A&P General Knowledge Master Multiple Choice Exam


1. The correct way to connect a test voltmeter in a circuit is:

a) between the source voltage and the load.
b) in series with a unit.
c) in parallel with a unit.
2. (Refer to Figure 18.) The control valve switch must be placed in the neutral position when the landing gears are down to:



a) remove the ground from the green light.
b) permit the test circuit to operate.
c) prevent the warning horn from sounding when the throttles are closed.
3. (Refer to Figure 45.) What type weld is shown at G?



a) Butt.
b) Joint.
c) Lap.
4. A lead-acid battery with 12 cells connected in series (no-load voltage = 2.1 volts per cell) furnishes 10 amperes to a load of 2-ohms resistance. The internal resistance of the battery in this instance is:

a) 5.0 ohms
b) 2.52 ohms
c) 0.52 ohms
5. A circuit has an applied voltage of 30 volts and a load consisting of a 10-ohm resistor in series with a 20­ohm resistor. What is the voltage drop across the 10-ohm resistor?

a) 30volts.
b) 20volts.
c) 10volts.
6. What is the allowable manufacturing tolerance for a bushing where the outside dimensions shown on the blueprint are:
1.0625 +.0025 -.0003?

a) 1.0650.
b) 1.0647.
c) 0.0028.
7. (1) A measurement should not be scaled from an aircraft print because the paper shrinks or stretches when the print is made.
(2) When a detail drawing is made, it is carefully and accurately drawn to scale, and is dimensioned.
Regarding the above statements:

a) neither No.1 nor No.2 is true.
b) only No.2 is true.
c) both No.1 and No.2 are true.
8. Which requires the most electrical power? (Note: 1 horsepower =746 watts)

a) Four 30-watt lamps arranged in a 12-volt parallel circuit.
b) A 24-volt anticollision light circuit consisting of two light assemblies which require 3 amperes each during operation.
c) A 1/5-horsepower, 24-volt motor which is 75 percent efficient.
9. (Refer to Figure 6.) If resistor R5 is disconnected at the junction of R4 and R3 as shown, what will the ohmmeter read?



a) 3 ohms.
b) 2.76 ohms.
c) 12 ohms.
10. (Refer to Figure 49.) The measurement reading on the micrometer is:



a) 0.2758.
b) 0.2792.
c) 0.2702.
11. Which tool is used to find the center of a shaft or other cylindrical work?

a) Combination set.
b) Dial indicator.
c) Micrometer caliper.
12. Which of the following hose materials are compat­ible with phosphate-ester base hydraulic fluids?
1. Butyl.
2. Teflon.
3. Buna-N.
4. Neoprene.

a) 1 and 2.
b) 2 and 4.
c) 1 and 3.
13. A part which is being prepared for dye penetrant inspection should be cleaned with:

a) water-base solvents only.
b) the penetrant developer.
c) a volatile petroleum-base solvent.
14. The empty weight of an airplane is determined by:

a) subtracting the tare weight from the scale reading and adding the weight of each weighing point.
b) multiplying the measured distance from each weigh­ing point to the datum times the sum of scale reading less the tare weight.
c) adding the net weight of each weighing point and multiplying the measured distance to the datum.
15. (Refer to Figure 23.) If an open occurs at R1, the light:



a) cannot be turned on.
b) will not be affected.
c) cannot be turned off.
16. Scratches or nicks on the straight portion of alumi­num alloy tubing may be repaired if they are no deeper than:

a) 10 percent of the wall thickness.
b) 20 percent of the wall thickness.
c) 1/32 inch or 20 percent of wall thickness, whichever is less.
17. The pattern for an inclusion is a magnetic particle buildup forming:

a) a single line.
b) parallel lines.
c) a fernlike pattern.
18. (Refer to Figure 36.) The vertical distance between the top of the plate and the bottom of the lowest 15/64-inch hole is:



a) 2.250.
b) 2.242.
c) 2.367.
19. The voltage drop in a conductor of known resis­tance is dependent on:

a) the amperage of the circuit.
b) the voltage of the circuit.
c) only the resistance of the conductor and does not change with a change in either voltage or amperage.
20. (Refer to Figure 34.) What is the dimension of the chamfer?



a) 0.3125 + .005 -0.
b) 1/16 X 37°.
c) 0.0625 X 45°.
21. If it is necessary to accurately measure the diam­eter of a hole approximately 1/4 inch in diameter, the mechanic should use a:

a) small-hole gauge and determine the size of the hole by taking a micrometer reading of the ball end of the gauge.
b) telescoping gauge and determine the size of the hole by taking a micrometer reading of the adjustable end of the telescoping gauge.
c) 0 to 1-inch inside micrometer and read the measure­ment directly from the micrometer.
22. For sketching purposes, almost all objects are composed of one or some combination of six basic shapes; these include the:

a) triangle, circle, cube, cylinder, cone, and sphere.
b) angle, arc, line, plane, square, and circle.
c) triangle, plane, arc, line, square, and polygon.
23. (Refer to Figure 44.) Identify the weld caused by an excessive amount of acetylene.



a) 3.
b) 4.
c) 1.
24. 0.002KV equals

a) 0.2 volt.
b) 2.0 volts.
c) 20 volts.
25. A hydraulic system schematic drawing typically indicates the:

a) amount of pressure in the pressure and return lines, and in system components.
b) direction of fluid flow through the system.
c) specific location of the individual components within the aircraft.
26. Unless otherwise specified or required, aircraft bolts should be installed so that the bolthead is:

a) downward, or in a forward direction.
b) downward, or in a rearward direction.
c) upward, or in a forward direction.
27. The useful load of an aircraft consists of the:

a) crew, usable fuel, oil, and fixed equipment.
b) crew, passengers, usable fuel, oil, cargo, and fixed equipment.
c) crew, usable fuel, passengers, and cargo.
28. An aircraft with an empty weight of 2,100 pounds and an empty weight CG +32.5 was altered as follows:
1. two 18-pound passenger seats located at +73 were removed;
2. structural modifications were made at +77 increasing weight by 17 pounds;
3. a seat and safety belt weighing 25 pounds were installed at +74.5; and
4. radio equipment weighing 35 pounds was installed at +95.
What is the new empty weight CG?

a) +34.65.
b) +34.01.
c) +33.68.
29. Improper loading of a helicopter which results in exceeding either the fore or aft CG limits is hazardous due to the:

a) Coriolis effect being translated to the fuselage.
b) reduction or loss of effective cyclic pitch control.
c) reduction or loss of effective collective pitch control.
30. If dye penetrant inspection indications are not sharp and clear, the most probable cause is that the part:

a) was not correctly degaussed before the developer was applied.
b) was not thoroughly washed before developer was applied.
c) has no appreciable damage.
31. In the four-digit aluminum index system number 2024, the first digit indicates:

a) the number of major alloying elements used in the metal.
b) the percent of alloying metal added.
c) the major alloying element.
32. Which coupling nut should be selected for use with 1/2-inch aluminum oil lines which are to be assembled using flared tube ends and standard AN nuts, sleeves, and fittings?

a) AN-818-8.
b) AN-818-16.
c) AN-818-5.
33. The maximum weight of an aircraft is the:

a) empty weight plus crew, maximum fuel, cargo, and baggage.
b) empty weight plus crew, passengers, and fixed equip­ment.
c) empty weight plus useful load.
34. The amount of electricity a capacitor can store is directly proportional to the:

a) distance between the plates and inversely proportional to the plate area.
b) plate area and is not affected by the distance between the plates.
c) plate area and inversely proportional to the distance between the plates.
35. Which statement regarding the hydrometer reading of a lead-acid storage battery electrolyte is true?

a) A specific gravity correction should be added to the hydrometer reading if the electrolyte temperature is below 59°F.
b) The hydrometer reading does not require a tempera­ture correction if the electrolyte temperature is 80°F.
c) The hydrometer reading will give a true indication of the capacity of the battery regardless of the electrolyte temperature.
36. Forward biasing of a solid state device will cause the device to:

a) conduct via zener breakdown.
b) turn off.
c) conduct.
37. Repeatedly applying mechanical force to most metals such as rolling, hammering, bending, or twisting commonly results in a condition known as:

a) stress corrosion cracking.
b) tempering or drawing.
c) cold working, strain, or work hardening.
38. A drawing in which the subassemblies or parts are shown as brought together on the aircraft is called:

a) a detail drawing.
b) a sectional drawing.
c) an installation drawing.
39. If electrolyte from a lead-acid battery is spilled in the battery compartment, which procedure should be followed?

a) Apply boric acid solution to the affected area followed by a water rinse.
b) Rinse the affected area thoroughly with clean water.
c) Apply sodium bicarbonate solution to the affected area followed by a water rinse.
40. (Refer to Figure 16.) The TCO relay will operate if 24-volts dc is applied to the bus and the fuel tank selector is in the:



a) Ieft-hand tank position.
b) right-hand tank position.
c) crossfeed position.
41. When dealing with weight and balance of an aircraft, the term "maximum weight" is interpreted to mean the maximum:

a) weight of the useful load.
b) authorized weight of the aircraft and its contents.
c) weight of the empty aircraft.
42. Which heat-treating operation would be performed when the surface of the metal is changed chemically by introducing a high carbide or nitride content?

a) Tempering.
b) Case hardening.
c) Normalizing.
43. A certain amount of slack must be left in a flexible hose during installation because, when under pressure, it:

a) contracts in length and expands in diameter.
b) expands in length and contracts in diameter.
c) expands in length and diameter.
44. (Refer to Figure 18.) When the landing gears are up and the throttles are retarded, the warning horn will not sound if an open occurs in wire:



a) No.9.
b) No.4.
c) No.2.
45. In the theory of weight and balance, what is the name of the distance from the fulcrum to an object?

a) Lever arm.
b) Fulcrum arm.
c) Balance arm.
46. In nickel-cadmium batteries, a rise in cell tem­perature:

a) causes a decrease in internal resistance.
b) increases cell voltage.
c) causes an increase in internal resistance.
47. (Refer to General figure 2.)
What is the total capacitance of a circuit containing three capacitors with capacitances of
.02 microfarad, .05 microfarad, and .10 microfarad, respectively?



a) .0125 µF.
b) 0.125 pF.
c) 0.170 µF.
48. When checking an item with the magnetic particle inspection method, circular and longitudinal magnetiza­tion should be used to:

a) ensure uniform current flow.
b) reveal all possible defects.
c) evenly magnetize the entire part.
49. (Refer to Figure 9.) How many instruments (voltme­ters and ammeters) are installed correctly?



a) Two.
b) 0ne.
c) Three.
50. A cabin entry light of 10 watts and a dome light of 20 watts are connected in parallel to a 30-volt source. If the voltage across the 10-watt light is measured, it will be:

a) half the voltage across the 20-watt light.
b) equal to the voltage across the 20-watt light.
c) one-third of the input voltage.
51. (Refer to Figure 7.) If resistor R3 is disconnected at terminal D, what will the ohmmeter read?



a) 10 ohms.
b) Infinite resistance.
c) 20 ohms.
52. An aircraft had an empty weight of 2,886 pounds with a moment of 101,673.78 before several alterations were made. The alterations included:
1. removing two passenger seats (15 pounds each) at +71;
2. installing a cabinet (97 pounds) at +71;
3. installing a seat and safety belt (20 pounds) at +71; and
4. installing radio equipment (30 pounds) at +94.

The alterations caused the newempty weight CG to move:

a) 2.03 inches aft of the original empty weight CG.
b) 1.62 inches aft of the original empty weight CG.
c) 2.03 inches forward of the original empty weight CG.
53. (Refer to Figure 32.) What is the next step required for a working sketch of the illustration?



a) Darken the object outlines.
b) Sketch extension and dimension lines.
c) Add notes, dimensions, title, and date.
54. Which statement concerning Bernoulli's principle is true?

a) Ther pressure of a fluid decreases at points where the velocity of the fluid increases.
b) The pressure of a fluid increases at points where the velocity of the fluid increases.
c) It applies only to gasses and vaporized liquids.
55. (Refer to Figure 21.) Which symbol represents a variable resistor?



a) 1.
b) 2.
c) 3.
56. (Refer to Figure 23.) If R2 sticks in the up position, the light will:



a) not illuminate.
b) be very dim.
c) be on full bright.
57. Which requires the most electrical power during operation?

a) Four 30-watt lamps in a 12-volt parallel circuit.
b) Two lights requiring 3 amperes each in a 24-volt parallel system.
c) A 12-volt motor requiring 8 amperes.
58. Why is steel tempered after being hardened?

a) To increase its strength and decrease its internal stresses.
b) To increase its hardness and ductility.
c) To relieve its internal stresses and reduce its brittleness.
59. What is the total capacitance of a certain circuit containing three capacitors with capacitances of 0.25 microfarad, 0.03 microfarad, and 0.12 microfarad, respectively?
(Note: CT C1 + C2 + C3)

a) 0.04 uF
b) 0.04 pF
c) 0.4 uF
60. Holes and a few projecting globules are found in a weld. What action should be taken?

a) Reweld the defective portions.
b) Grind the rough surface smooth, inspect, and reweld all gaps/holes.
c) Remove all the old weld, and reweld the joint.
61. (Refer to Figure 39.) Determine the minimum wire size of a single cable in a bundle carrying a continuous current of 20 amperes 10 feet from the bus to the equip­ment in a 28-volt system with an allowable 1-volt drop.



a) No. 12.
b) No.16.
c) No.14.
62. What type of corrosion attacks grain boundaries of aluminum alloys which are improperly or inadequately heat treated?

a) Fretting.
b) Intergranular.
c) Filiform.
63. Which statement is applicable when using a sketch for making a part?

a) The sketch may be used only if supplemented with three-view orthographic projection drawings.
b) The sketch need not show all necessary construction details.
c) The sketch must show all information to manufacture the part.
64. The servicing and charging of nickel-cadmium and lead-acid batteries together in the same service area is likely to result in:

a) normal battery service life.
b) contamination of both types of batteries.
c) increased explosion and or fire hazard.
65. Which statement regarding aircraft bolts is correct?

a) When tightening castellated nuts on drilled bolts, if the cotter pin holes do not line up, it is permissible to overtighten the nut to permit alignment of the next slot with the cotter pin hole.
b) Alloy steel bolts smaller than 1 1/4 - inch diameter should not be used in primary structure.
c) In general, bolt grip lengths should equal the material thickness.
66. Datum is forward of the main gear center point ...................................30.24 inches
Actual distance between tail gear and main gear center points .............360.26 inches
Net weight at right main gear ........................................................................ 9,980 pounds
Net weight at left main gear .......................................................................... 9,770 pounds
Net weight at tail gear ....................................................................................1,970 pounds

These items were in the aircraft when weighed:
1. Lavatory water tank full (34 pounds at +352).
2. Hydraulic fluid (22 pounds at -8).
3. Removable ballast (146 pounds at +380).

What is the empty weight CG of the aircraft described above?

a) 62.92 inches.
b) 60.31 inches.
c) 58.54 inches.
67. (Refer to Figure 10.) What is the measured voltage of the series-parallel circuit between terminals A and B?



a) 3.0 volts.
b) 4.5 volts.
c) 1 .5 volts.
68. (Refer to Figure 16.) When electrical power is applied to the bus, which relays are energized?



a) TCC and TCO.
b) PCO and PCC.
c) PCC and TCC.
69. Which of these will cause the resistance of a conductor to decrease?

a) Decrease the length or the cross-sectional area.
b) Increase the length or decrease the cross-sectional area.
c) Decrease the length or increase the cross-sectional area.
70. (Refer to figure 4.) How much power is being furnished to the circuit?



a) 575 watts.
b) 2645 watts.
c) 2875 watts.
71. A line used to show an edge which is not visible is a:

a) phantom line.
b) break line.
c) hidden line.
72. What is descriptive of the annealing process of steel during and after it has been annealed?

a) Slow cooling; low strength.
b) Rapid cooling; high strength.
c) Slow cooling; increased resistance to wear.
73. Since sketches, by their nature, are drawn without the use of drafting instruments, the layout process is usually made easier by the use of:

a) graph paper.
b) plain white paper.
c) ruled note paper.
74. What should be the first step of the procedure in sketching an aircraft wing skin repair?

a) Draw heavy guidelines.
b) Lay out the repair.
c) Block in the views.
75. The potential difference between two conductors which are insulated from each other is measured in:

a) coulombs.
b) amperes.
c) volts.
76. How much power must a 24-volt generator furnish to a system which contains the following loads?
UNIT RATING
One motor (75 percent efficient) ......................... 1/5 hp
Three position lights ................................ 20 watts each
One heating element ........................................... 5 amp
One anticollision light .......................................... 3 amp

(Note: 1 horsepower =746 watts)

a) 385 watts.
b) 450 watts.
c) 402 watts.
77. Refer to Figure 16.) What will be the effect if the PCO relay fails to operate when the left-hand tank is selected:



a) The fuel tank crossfeed valve open light will illuminate.
b) The fuel pressure crossfeed valve will not open.
c) The fuel pressure crossfeed valve open light will not illunimate.
78. Which of the following materials may be inspected using the magnetic particle inspection method?
1. Magnesium alloys.
2. Aluminum alloys.
3. Iron alloys.
4. Copper alloys.
5. Zinc alloys.

a) 1, 2, 3.
b) 3.
c) 1, 2, 4, 5.
79. What is the color of an AN steel flared-tube fitting?

a) Blue.
b) Red.
c) Black.
80. What type of line is normally used in a mechanical drawing or blueprint to represent an edge or object not visible to the viewer?

a) Medium solid line.
b) Medium-weight dashed line.
c) Alternate short and long light dashes.
81. One purpose for schematic diagrams is to show the:

a) functional location of components within a system.
b) physical location of components within a system.
c) size and shape of components within a system.
82. The Society of Automotive Engineers (SAE) and the American Iron and Steel Institute use a numerical index system to identify the composition of various steels. In the number "4130" designating chromium molybdenum steel, the first digit indicates the:

a) percentage of the basic element in the alloy.
b) percentage of carbon in the alloy in hundredths of a percent.
c) basic alloying element.
83. What may result it water is added to a nickel­cadmium battery when it is not tully charged?

a) Excessive spewing is likely to occur during the Charg­ing cycle.
b) No adverse effects since water may be added anytime.
c) Excessive electrolyte dilution.
84. (Refer to Figure 45.) What type weld is shown at A?



a) Butt.
b) Fillet.
c) Lap.
85. When different rated capacitors are connected in parallel in a circuit, the total capacitance is:
(Note: CT =C1 + C2 + Ca ...)

a) equal to the sum of all the capacitances.
b) less than the capacitance of the lowest rated capacitor.
c) equal to the capacitance of the highest rated capacitor.
86. Which of the following can provide the empty weight of an aircraft if the aircraft's weight and balance records become lost, destroyed, or otherwise inaccurate?

a) Reweighing the aircraft.
b) The applicable flight manual or pilot's operating handbook.
c) The applicable Aircraft Specification or Type Certifi­cate Data Sheet.
87. When making a rearward weight and balance check to determine that the CG will not exceed the rearward limit during extreme conditions, the items of useful load which should be computed at their minimum weights are those located forward of the:

a) datum.
b) forward CG limit.
c) rearward CG limit.
88. As weighed, the total empty weight of an aircraft is 5,862 pounds with a moment of 885,957. However, when the aircraft was weighed, 20 pounds of alcohol were on board at +84, and 23 pounds of hydraulic fluid are in a tank located at + 101. What is the empty weight CG of the aircraft?

a) 150.700.
b) 151.700.
c) 151.365.
89. The measurements showing the ideal or "perfect" sizes of parts on drawings are called:

a) tolerances.
b) allowances.
c) dimensions.
90. How is the locking feature of the fiber-type locknut obtained?

a) By the use of an unthreaded fiber locking insert.
b) By making the threads in the fiber insert slightly smaller than those in the load carrying section.
c) By a fiber insert held firmly in place at the base of the load carrying section.
91. A 3/8 inch aircraft high pressure flexible hose as compared to 3/8 inch metal tubing used in the same system will:

a) have about the same OD.
b) have equivalent flow characteristics.
c) usually have interchangeable applications.
92. In an N-P-N transistor application, the solid state device is turned on when the:

a) emitter is positive with respect to the base.
b) base is positive with respect to the emitter.
c) base is negative with respect to the emitter.
93. (1) According to 14 CFR Part 91, repairs to an aircraft skin should have a detailed dimensional sketch included in the permanent records.
(2) On occasion, a mechanic may need to make a Simple sketch of a proposed repair to an aircraft, a new design, or a modification.
Regarding the above statements:

a) only No.2 is true.
b) only No.1 is true.
c) both No.1 and No.2 are true.
94. A bolt with an X inside a triangle on the head is classified as an:

a) NAS close tolerance bolt.
b) NAS standard aircraft bolt.
c) AN corrosion-resistant steel bolt.
95. Alclad is a metal consisting of:

a) pure aluminum surface layers on an aluminum alloy core.
b) aluminum alloy surface layers and a pure aluminum core.
c) a homogeneous mixture of pure aluminum and alumi­num alloy.
96. Which of the following statements is/are generally true regarding the charging of several aircraft batteries together?
1. Batteries of different voltages (but similar capacities) can be connected in series with each other across the charger, and charged using the constant current method.
2.Batteries of different ampere-hour capacity and same voltage can be connected in parallel with each other across the charger, and charged using the constant voltage method.
3. Batteries of the same voltage and same ampere-hour capacity must be connected in series with each other across the charger, and charged using the constant current method.

a) 1 and 2.
b) 2 and 3.
c) 3.
97. When flaring aluminum tubing for use with AN fittings, the flare angle must be:

a) 45°.
b) 35°.
c) 37°.
98. Which condition indicates a part has cooled too quickly after being welded?

a) Discoloration of the base metal.
b) Gas pockets, porosity, and slag inclusions.
c) Cracking adjacent to the weld.
99. Normalizing is a process of heat treating:

a) aluminum alloys only.
b) both aluminum alloys and iron-base metals.
c) iron-base metals only.
100. If three resistors of 3 ohms, 5 ohms, and 22 ohms are connected in series in a 28-volt circuit, how much current will flow through the 3-ohm resistor?

a) 0.93 ampere.
b) 9.3 amperes.
c) 1.05 amperes.
101. The maximum weight as used in weight and bal­ance control of a given aircraft can normally be found:

a) in the Aircraft Specification or Type Certificate Data Sheet.
b) by adding the empty weight and payload.
c) by adding the weight of full fuel, pilot, passengers, and maximum allowable baggage to the empty weight.
102. (Refer to Figure 8.) With an ohmmeter connected into the circuit as shown, what will the ohmmeter read?



a) lnfinite resistance.
b) 20 ohms.
c) 10 ohms.
103. How can the state-of-charge of a nickel-cadmium battery be determined?

a) by the level ot the electrolyte.
b) by a measured discharge.
c) by measuring the specific gravity of the electrolyte.
104. When computing weight and balance, an airplane is considered to be in balance when:

a) the movement of the passengers will not cause the moment arms to fall outside the CG range.
b) the average moment arm of the loaded airplane falls within its CG range.
c) all moment arms of the plane fall within CG range.
105. (Refer to Figure 48.) What does the micrometer read?



a) 0.3004.
b) 0.31 08.
c) 0.2974.
106. The presence of any small amounts of potassium carbonate deposits on the top of nickel-cadmium battery cells in service is an indication of:

a) plate sulfation.
b) excessive gassing.
c) normal operation.
107. A fiber-type, self-locking nut must never be used on an aircraft if the bolt is:

a) subject to rotation.
b) under shear loading.
c) under tension loading.
108. In most aircraft hydraulic systems, two-piece tube connectors conSisting of a sleeve and a nut are used when a tubing flare is required. The use of this type connector eliminates:

a) wrench damage to the tubing during the tightening process.
b) the flaring operation prior to assembly.
c) the possibility of reducing the flare thickness by wiping or ironing during the tightening process.
109. The useful load of an aircraft is the:

a) difference between the maximum gross weight and empty weight.
b) difference between the net weight and total weight.
c) sum of the empty weight and the maximum gross weight.
110. Which is correct in reference to electrical resis­tance?

a) Two electrical devices will have the same combined resistance if they are connected in series as they will have if connected in parallel.
b) If one of three bulbs in a parallel lighting circuit is removed, the total resistance of the circuitwill become greater.
c) An electrical device that has a high resistance will use more power than one with a low resistance with the same applied voltage.
111. Which statement relating to the residual magnetiz­ing inspection method is true?

a) It is used in practically all circular and longitudinal magnetizing procedures.
b) It may be used with steels which have been heat treated for stressed applications.
c) Subsurface discontinuities are made readily apparent.
112. A 12-volt electric motor has 1,000 watts input and 1 horsepower output. Maintaining the same efficiency, how much input power will a 24-volt, l-horsepower elec­tric motor require?
(Note: 1 horsepower =746 watts)

a) 2,000 watts.
b) 500 watts.
c) 1000 watts.
113. (Refer to Figure 40.) Determine the proper tension for a 3/16-inch cable (7 x 19 extra flex) if the temperature is 87°F.



a) 140 pounds.
b) 135 pounds.
c) 125 pounds.
114. Working drawings may be divided into three classes. They are:

a) title drawings, installation drawings, and assembly drawings.
b) detail drawings, assembly drawings, and installation drawings.
c) detail drawings, orthographic projection drawings, and pictorial drawings
115. What determines whether the value of the moment is preceded by a plus (+) or a minus (-) sign in aircraft weight and balance?

a) The location of the weight in reference to the datum.
b) The location of the datum in reference to the aircraft CG.
c) The result of a weight being added or removed and its location relative to the datum.
116. What should be clearly indicated on the aircraft weighing form?

a) Weighing points.
b) Weight of unusable fuel.
c) Minimum allowable gross weight.
117. What tool is generally used to set a divider to an exact dimension?

a) Machinist scale.
b) Dial indicator.
c) Surface gauge.
118. Aircraft bolts with a cross or asterisk marked on the bolthead are:

a) standard steel bolts.
b) made of aluminum alloy.
c) close tolerance bolts.
119. One way a part may be demagnetized after mag­netic particle inspection is by:

a) slowly moving the part out of an ac magnetic field of sufficient strength.
b) subjecting the part to high voltage, low amperage ac.
c) slowly moving the part into an ac magnetic field of sufficient strength.
120. What nondestructive testing method requires little or no part preparation, is used to detect surface or near­surface defects in most metals, and may also be used to separate metals or alloys and their heat-treat conditions?

a) Ultrasonic inspection.
b) Magnetic particle inspection.
c) Eddy current inspection.
121. (Refer to Figure 31.) What are the proper proce­dural steps for sketching repairs and alterations?



a) 4, 2, 3, 1.
b) 3, 1, 4, 2.
c) 1, 3, 4, 2.
122. Which heat-treating process of metal produces a hard, wear-resistant surface over a strong, tough core?

a) Annealing.
b) Tempering.
c) Case hardening.
123. (Refer to Figure 35.) Identify the extension line.



a) 4.
b) 1.
c) 3.
124. (Refer to Figure 30.) Identify the bottom view of the object.



a) 2.
b) 3.
c) 1.
125. Select a characteristic of a good gas weld.

a) The depth of penetration shall be sufficient to ensure fusion of the filler rod.
b) The weld should taper off smoothly into the base metal.
c) The height of the weld bead should be 1/8 inch above the base metal.
126. An aircraft as loaded weighs 4,954 pounds at a CG of +30.5 inches. The CG range is +32.0 inches to +42.1 inches. Find the minimum weight of the ballast necessary to bring the CG within the CG range. The ballast arm is +162 inches.

a) 57.16 pounds.
b) 30.58 pounds.
c) 61.98 pounds.
127. A 48-volt source is required to furnish 192 watts to a parallel circuit consisting of three resistors of equal value. What is the value of each resistor?

a) 12 ohms.
b) 36 ohms.
c) 4 ohms
128. An aircraft with an empty weight of 1,800 pounds and an empty weight CG of +31.5 was altered as follows:
1. two 15-pound passenger seats located at +72 were removed;
2. structural modifications increasing the weight 14 pounds were made at +76;
3. a seat and safety belt weighing 20 pounds were installed at +73.5; and
4. radio equipment weighing 30 pounds was installed at +30.

What is the new empty weight CG?

a) +32.69.
b) +31.61.
c) +30.61.
129. Aircraft bolts are usually manufactured with a:

a) class 1 fit for the threads.
b) class 2 fit for the threads.
c) class 3 fit for the threads.
130. An increase in which of the following factors will cause an increase in the inductive reactance of a circuit?

a) Resistance and voltage.
b) Inductance and frequency.
c) Resistance and capacitive reactance.
131. What type of diagram is used to explain a principle of operation, rather than show the parts as they actually appear?

a) A pictorial diagram.
b) A block diagram.
c) A schematic diagram.
132. The method used to rapidly charge a nickel-cadmium battery utilizes:

a) constant voltage and varying current.
b) constant current and constant voltage.
c) constant current and varying voltage.
133. (Refer to Figure 39.) Determine the maximum length of a No. 12 single cable that can be used between a 28-volt bus and a component utilizing 20 amperes continuous load in free air with a maximum acceptable 1­volt drop.



a) 26.5 feet.
b) 22.5 feet.
c) 12.5 feet.
134. (Refer to Figure 26.) Which of the logic gate output conditions is correct with respect to the given inputs?



a) 1.
b) 3.
c) 2.
135. (Refer to Figure 12.) Find the total resistance of the circuit.



a) 21.2 ohms.
b) 2.6 ohms.
c) 16 ohms.
136. Which of these nondestructive testing methods is suitable for the inspection of most metals, plastics, and ceramics for surface and subsurface defects?

a) Ultrasonic inspection.
b) Magnetic particle inspection.
c) Eddy current inspection.
137. A specific measured distance from the datum or some other point identified by the manufacturer, to a point in or on the aircraft is called a:

a) zone number.
b) reference number.
c) station number.
138. (Refer to Figure 46.) The measurement reading on the illustrated micrometer is:



a) 0.2901.
b) 0.2851.
c) 0.2911.
139. Nickel-cadmium batteries which are stored for a long period of time will show a low liquid level because:

a) electrolyte becomes absorbed into the plates.
b) electrolyte evaporates through the vents.
c) of current leakage from individual cells.
140. When referring to an electrical circuit diagram, what paint is considered to be at zero voltage?

a) The circuit breaker.
b) The switch.
c) The ground reference.
141. A 14-ohm resistor is to be installed in a series circuit carrying .05 ampere. How much power will the resistor be required to dissipate?

a) Less than .035 watt.
b) At least .70 milliwatt.
c) At least 35 milliwatts.
142. Unless otherwise specified, torque values for tight­ening aircraft nuts and bolts relate to:

a) clean, lightly oiled threads.
b) either dry or lightly oiled threads.
c) clean, dry threads.
143. The following alteration was performed on an aircraft: A model 8 engine weighing 175 pounds was replaced by a model 0 engine weighing 185 pounds at a -62.00-inch station. The ai rcraft weight and balance records show the previous empty weight to be 998 pounds and an empty weight CG of 13.48 inches. What is the new empty weightCG?

a) 12.73 inches.
b) 14.25 inches.
c) 13.96 inches.
144. Zone numbers on aircraft blueprints are used to:

a) indicate different sections of the aircraft.
b) locate parts, sections, and views on large drawings.
c) Iocate parts in the aircraft.
145. In an ac circuit, the effective voltage is:

a) Iess than the maximum instantaneous voltage.
b) equal to the maximum instantaneous voltage.
c) greater than the maximum instantaneous voltage.
146. To obtain useful weight data for purposes of deter­mining the CG, it is necessary that an aircraft be weighed:

a) with no more than minimum fuel (1/12-gallon per METO horsepower) in all fuel tanks.
b) in a level flight attitude.
c) with all items of useful load installed.
147. On a fillet weld, the penetration requirement in­cludes what percentage(s) of the base metal thickness?

a) 25 to 50 percent.
b) 60 to 80 percent.
c) 100 percent.
148. One characteristic of a good weld is that no oxide should be formed on the base metal at a distance from the weld of more than:

a) 1/2 inch.
b) 1/4 inch.
c) 1 inch.
149. Magnetic particle inspection is used primarily to detect:

a) distortion.
b) flaws on or near the surface
c) deep subsurface flaws
150. What defects will be detected by magnetizing a part using continuous longitudinal magnetization with a cable?

a) Defects parallel to the long axis of the part.
b) Defects perpendicular to the long axis of the part.
c) Defects parallel to the concentric circles of magnetic force within the part.
151. (Refer to Figure 42.) Which of the bolthead code markings shown identifies an AN corrosion resistant steel bolt?



a) 2.
b) 3.
c) 1.
152. A mechanic has completed a bonded honeycomb repair using the potted compound repair technique. What nondestructive testing method is used to determine the soundness of the repair after the repair has cured?

a) Ultrasonic test.
b) Metallic ring test.
c) Eddy current test.
153. The working voltage of a capacitior in an ac circuit should be:

a) at least 50 percent greater than the highest applied voltage.
b) at least 20 percent greater than the highest applied voltage.
c) equal to the highest applied voltage.
154. Which material cannot be heat treated repeatedly without harmful effects?

a) Unclad aluminum alloy in sheet form.
b) 6061-T9 stainless steel.
c) Clad aluminum alloy.
155. (1) In nondestructive testing, a discontinuity may be defined as an interruption in the normal physical structure or configuration of a part.
(2) A discontinuity mayor may not affect the usefulness of a part.
Regarding the above statements:

a) both No. 1 and No.2 are true.
b) only No.1 is true.
c) only No.2 is true.
156. Find the empty weight CG location for the following tricycle-gear aircraft. Each main wheel weighs 753 pounds, nosewheel weighs 22 pounds, distance between nose­wheel and main wheels is 87.5 inches, nosewheellocation is +9.875 inches from datum, with 1 gallon of hydraulic fluid at -21.0 inches included in theweight scale.

a) +96.11 inches.
b) +95.61 inches.
c) +97.375 inches.
157. (Refer to Figure 16.) With power to the bus and the fuel selector switched to the right-hand tank, how many relays in the system are operating?



a) Two.
b) Four.
c) Three.
158. The reheating of a heat treated metal, such as with a welding torch:

a) has a cumulative enhancement effect on the original heat treatment.
b) has little or no effect on a metal's heat treated charac­teristics.
c) can significantly alter a metal's properties in the re­heated area.
159. When the specific torque value for nuts is not given, where can the recommended torque value be found?

a) AC 43.13-2A.
b) Technical Standard Order.
c) AC 43.13-1B.
160. (Refer to Figure 38.) An aircraft reciprocating engine has a 1 ,830 cubic-inch displacement and develops 1,250 brake-horsepower at 2,500 RPM. What is the brake mean effective pressure?



a) 205.
b) 225.
c) 217.
161. (Refer to Figure 45.) What type weld is shown at B?



a) Butt.
b) Fillet.
c) Double butt.
162. The end-ot-charge voltage ot a 19-cell nickel-cadmium battery, measured while still on charge:

a) depends upon its temperature and the method used for charging.
b) must be 1.2 to 1.3 volts per cell.
c) must be 1.4 volts per cell.
163. What tasks are completed prior to weighing an aircraft to determine its empty weight?

a) Remove all items on the aircraft equipment list; drain fuel, compute oil and hydraulic fluid weight.
b) Remove all items except those on the aircraft equip­ment list; drain fuel and hydraulic fluid.
c) Remove all items except those on the aircraft equip­ment list;drain fuel and fill hydraulic reservoir.
164. What type of diagram shows the wire size required for a particular installation?

a) A schematic diagram.
b) A block diagram.
c) A wiring diagram.
165. Which of the following describe the effects of annealing steel and aluminum alloys?
1 . decrease in internal stress.
2. softening of the metal.
3. improved corrosion resistance.

a) 2, 3.
b) 1, 3.
c) 1, 2.
166. (Refer to Figure 19.) Under which condition will a ground be provided forthe warning horn through both gear switches when the throttles are closed?

a) both gears up and the control valve out of neutral.
b) Left gear up and right gear down.
c) Right gear up and left gear down.
167. Which statement is true regarding an orthographic projection?

a) There are always at least two views.
b) It could have as many as eight views.
c) One-view, two-view, and three-view drawings are the most common.
168. (Refer to Figure 41.) Determine how much fuel would be required for a 30-minute reserve operating at 2,300 RPM.



a) 35.5 pounds.
b) 25.3 pounds.
c) 49.8 pounds.
169. (Refer to Figure 15.) When the landing gear is down, the green light will not come on if an open occurs in wire:



a) No.6.
b) No.17.
c) No.7.
170. (Refer to Figure 11.) Find the total current flowing in the wire between points C and D.



a) 2.4 amperes.
b) 6.0 amperes.
c) 3.0 amperes.
171. Two boxes which weigh 10 pounds and 5 pounds are placed in an airplane so that their distance aft from the CG are 4 feet and 2 feet respectively. How far forward of the CG should a third box, weighing 20 pounds, be placed so that the CG will not be changed?

a) 8 feet.
b) 2.5 feet.
c) 3 feet.
172. (Refer to Figure 22.) Which illustration is correct concerning bias application and current flow?



a) 1.
b) 3.
c) 2.
173. (Refer to Figure 38.) An aircraft reciprocating engine has a 2,800 cubic-inch displacement, develops 2,000 brake-horsepower, and indicates 270 brake mean effective pressure. What is the engine speed (RPM)?



a) 2,300.
b) 2,100.
c) 2,200.
174. (Refer to Figure 16.) Energize the circuit with the fuel tank selector switch selected to the left-hand posi­tion. Using the schematic, identify the switches that will change position.



a) 5, 9,10,11,12,13, 15.
b) 5, 6,11,12,13,15,16.
c) 3, 5, 6, 7,11,13.
175. What is the operating resistance of a 30-watt light bulb designed for a 28-volt system?

a) 0.93 ohm.
b) 1.07 ohms.
c) 26 ohms.
176. From the following sequences of steps, indicate the proper order you would use to make a single flare on a piece of tubing:
1. Place the tube in the proper size hole in the flaring block.
2. Project the end of the tube slightly from the top of the flaring tool, about the thickness of a dime.
3. Slip the fitting nut and sleeve on the tube.
4. Strike the plunger several light blows with a light­weight hammer or mallet and tu rn the plunger one-half turn after each blow.
5. Tighten the clamp bar securely to prevent slippage.
6. Center the plunger or flaring pin over the tube.

a) 3,1,6,2,5,4.
b) 1, 3, 5, 2, 4, 6.
c) 3,1,2,6,5,4.
177. (Refer to Figure 34.) What would be the minimum diameter of 4130 round stock required for the construction of the clevis that would produce a machined surface?



a) 55/64 inch.
b) 7/8 inch.
c) 1 inch.
178. (Refer to Figure 13.) Determine the total current flow in the circuit.



a) 0.8 ampere.
b) 0.2 ampere.
c) 1.4 amperes.
179. The basis for transformer operation in the use of alternating current is mutual:

a) inductance.
b) reactance.
c) capacitance.
180. (Refer to Figure 38.) An aircraft reciprocating engine has a 2,800 cubic-inch displacement and develops 2,000 brake-horsepower at 2,200 RPM. What is the brake mean effective pressure?



a) 257.5.
b) 275.0.
c) 242.5.
181. Which term means .001 ampere?

a) Microampere.
b) Milliampere.
c) Kiloampere.
182. (Refer to Figure 15.) With the landing gear re­tracted, the red indicator light will not come on if an open occurs in wire:



a) No.17.
b) No.7.
c) No. 19.
183. (Refer to Figure 44.) Select the illustration which depicts a cold weld.



a) 2.
b) 3.
c) 4.
184. (Refer to Figure 34.) Using the information, what size drill would be required to drill the clevis bolthole?



a) 21/64 inch.
b) 5/16 inch.
c) 1/2 inch.
185. Transfer of electrical energy from one conductor to another without the aid of electrical connections:

a) is called induction.
b) will cause excessive arcing and heat, and as a result is impractical.
c) is called airgap transfer.
186. (1) An aircraft part may be demagnetized by sub­jecting it to a magnetizing force from alternating current that is gradually reduced in strength.
(2) An aircraft part may be demagnetized by subjecting it to a magnetizing force from direct current that is alter­nately reversed in direction and gradually reduced in strength.
Regarding the above statements:

a) only No.1 is true.
b) both No.1 and No.2 are true.
c) only No.2 is true.
187. The opposition offered by a coil to the flow of alternating current is called (disregard resistance):

a) inductive reactance.
b) impedance.
c) reluctance.
188. An aircraft with an empty weight of 1,500 pounds and an empty weight CG of +28.4 was altered as follows:
1. two 12-pound seats located at +68.5 were removed;
2. structural modifications weighing +28 pounds were made at +73;
3. a seat and safety belt weighing 30 pounds were installed at +70.5; and
4. radio equipment weighing 25 pounds was installed at +85.

What is the new empty weight CG?

a) +30.30.
b) +23.51.
c) +31.35.
189. What type of measurement is used to designate the arm in weight and balance computation?

a) Weight.
b) Weight x distance.
c) Distance.
190. (Refer to Figure 17.) Which of the components is a potentiometer?



a) 3.
b) 11.
c) 5.
191. A bolt with a single raised dash on the head is classified as an:

a) AN corrosion-resistant steel bolt.
b) NAS close tolerance bolt.
c) NAS standard aircraft bolt.
192. (1) Bonded clamps are used for support when installing metal tubing.
(2) Unbonded clamps are used for support when install­ing wiring.
Regarding the above statements:

a) neither No. 1 nor No.2 is true.
b) both No.1 and No.2 are true.
c) only No. 1 is true.
193. (Refer to Figure 14.) The total resistance of the circuit is:



a) 17 ohms.
b) 35 ohms.
c) 25 ohms.
194. If a 40-pound generator applies + 1400 inch-pounds to a reference axis, the generator is located:

a) +25 from the axis.
b) +35 from the axis.
c) -35 from the axis.
195. A 1-horsepower, 24-volt dc electric motor that is 80 percent efficient requires 932.5 watts.
How much power will a 1-horsepower, 12-volt dc electric motor that is 75 percent efficient require?
(Note: 1 horsepower 746 watts)

a) 1 ,305.5 watts.
b) 932.5 watts.
c) 994.6 watts.
196. The testing medium that is generally used in magnetic particle inspection utilizes a ferromagnetic ma­terial that has:

a) high permeability and low retentivity
b) Iow permeability and high retentivity.
c) high permeability and high retentivity.
197. Which number represents the vernier scale gradu­ation of a micrometer?

a) 0.001.
b) 0.00001.
c) 0.0001.
198. Flexible lines must be installed with:

a) a slack of 5 to 8 percent of the length.
b) a slack of at least 10 to 12 percent of the length.
c) enough slack to allow maximum flexing during op­eration.
199. A particular component is attached to the aircraft structure by the use of an aircraft bolt and a castle tension nut combination. If the cotter pin hole does not align within the recommended torque range, the acceptable practice is to:

a) exceed the recommended torque range by no more than 10 percent.
b) tighten below the torque range.
c) change washers and try again.
200. (Refer to Figure 24.) Which statement concerning the depicted logic gate is true?



a) Any input being 1 will produce a 1 output.
b) AII inputs must be 1 to produce a 1 output.
c) Any input being 1 will produce a 0 output.
201. The maximum distance between end fittings to which a straight hose assembly is to be connected is SO inches. The minimum hose length to make such a connec­tion should be:

a) 52-1/2 inches.
b) 51-1/2 inches.
c) 54-1/2 inches.
202. (Refer to Figure 17.) The electrical symbol repre­sented at number 5 is a variable:



a) inductor.
b) resistor.
c) capacitor.
203. (Refer to Figure 20.) Troubleshooting an open circuit with a voltmeter as shown in this circuit will:



a) permit the battery voltage to appear on the voltmeter.
b) permit current to flow and illuminate the lamp.
c) create a low resistance path and the current flow will be greater than normal.
204. If the empty weight CG of an airplane lies within the empty weight CG limits:

a) it is necessary to calculate CG extremes.
b) minimum fuel should be used in both forward and rearward CG checks.
c) it is not necessary to calculate CG extremes.
205. (Refer to Figure 27.) In the isometric view of a typical aileron balance weight, identify the view indicated by the arrow.

a) 3.
b) 2.
c) 1.
206. Which tool is used to measure the clearance between a surface plate and a relatively narrow surface being checked for flatness?

a) Dial indicator.
b) Thickness gauge.
c) Depth gauge.
207. A gas or fluid line marked with the letters PHDAN:

a) is carrying a substance which may be dangerous to personnel.
b) is a high-pressure line. The letters mean Pressure High, Discharge at Nacelle.
c) is carrying a substance that cannot be made non­toxic.
208. Liquid penetrant inspection methods may be used on which of the following?
1. porous plastics.
2. ferrous metals.
3. nonferrous metals.
4. smooth unpainted wood.
5.nonporous plastics.

a) 2, 3, 5.
b) 1, 2, 3.
c) 2, 3, 4.
209. What unit is used to express electrical power?

a) Volt.
b) Watt.
c) Ampere.
210. How many of these factors are considered essen­tial knowledge for x-ray exposure?
1. Processing of the film.
2. Material thickness and density.
3. Exposure distance and angle.
4. Film characteristics.

a) Four.
b) Three.
c) One.
211. The drawings often used in illustrated parts manuals are:

a) exploded view drawings.
b) detail drawings.
c) block drawings.
212. Zero fuel weight is the:

a) dry weight plus the weight of full crew, passengers, and cargo.
b) maximum permissable weight of a loaded aircraft (passengers, crew, and cargo) without fuel.
c) basic operating weight without crew, fuel, and cargo.
213. The aluminum code number 1100 identifies what type of aluminum?

a) Aluminum alloy containing 11 percent copper.
b) 99 percent commercially pure aluminum.
c) Aluminum alloy containing zinc.
214. When inductors are connected in series in a circuit, the total inductance is:
(where the magnetic fields of each inductor do not affect the others) (Note: LT =L1 + L2 + La ...)

a) equal to the sum of the individual inductances.
b) less than the inductance of the lowest rated inductor.
c) equal to the inductance of the highest rated inductor.
215. A 24-volt source is required to furnish 48 watts to a parallel circuit consisting of two resistors of equal value. What is the value of each resistor? (Note: Rt = E2/P)

a) 24 ohms.
b) 6 ohms.
c) 12 ohms.
216. If the reference datum line is placed at the nose of an airplane rather than at the firewall or some other location aft of the nose:

a) measurement arms can be either positive or negative numbers depending on the manufacturer's preference.
b) all measurement arms will be in positive numbers.
c) all measurement arms will be in negative numbers.
217. (Refer to Figure 34.) What is the maximum diam­eter of the hole for the clevis pin?



a) 0.31255.
b) 0.3175.
c) 0.3130.
218. The material specifications for a certain aircraft require that a replacement oil line be fabricated from 3/4­inch 0.072 S052-0 aluminum alloy tubing. What is the inside dimension of this tubing?

a) 0.606 inch.
b) 0.750 inch.
c) 0.688 inch.
219. When calculating power in a reactive or inductive ac circuit, the true power is:

a) less than the apparent power in a reactive circuit and more than the apparent power in an inductive circuit.
b) lkess than the apparent power.
c) more than the apparent power.
220. The amount of fuel used for computing empty weight and corresponding CG is:

a) the amount of fuel necessary for 112 hour of operation.
b) unusable fuel.
c) empty fuel tanks.
221. When determining the empty weight of an aircraft, certificated under current airworthiness standards (14 CFR Part 23), the oil contained in the supply tank is considered:

a) the same as the fluid contained in the water injection reservoir.
b) a part of the empty weight.
c) a part of the useful load.
222. (Refer to Figure 47.) What is the measurement reading on the vernier caliper scale?



a) 1.436 inches.
b) 1 .411 inches.
c) 1.700 inches.
223. (Refer to Figure 15.) The No.7 wire is used to:



a) open the UP indicator light circuit when the landing gear is retracted.
b) close the UP indicator light circuit when the landing gear is retracted.
c) complete the PUSH-TO-TEST circuit.
224. The CG range in single-rotor helicopters is:

a) approximately the same as the CG range for air­planes.
b) more restricted than for airplanes.
c) much greater than for airplanes.
225. Under magnetic particle inspection, a part will be identified as having a fatigue crack under which condition?

a) The discontinuity is found in a highly stressed area of the part.
b) The discontinuity pattern is straight.
c) The discontinuity is found in a nonstressed area of the part.
226. What FAA-approved document gives the leveling means to be used when weighing an aircraft?

a) Manufacturer's maintenance manual.
b) AC 43.13-1B.
c) Type Certificate Data Sheet.
227. A 24-volt source is required to furnish 48 watts to a parallel circuit consisting of two resistors of equal value. What is the value of each resistor?

a) 24 ohms.
b) 6 ohms.
c) 12 ohms
228. (Reter to Figure 43.) Identity the clevis bolt illus­trated.



a) 2.
b) 3.
c) 1.
229. Generally speaking, bolt grip lengths should be:

a) equal to the thickness of the material which is fas­tened together.
b) one and one half times the thickness of the material which is fastened together.
c) equal to the thickness of the material which is fas­tened together, plus approximately one diameter.
230. Through which material will magnetic lines of force pass the most readily?

a) Iron.
b) Copper.
c) Aluminum.
231. In a balance computation of an aircraft from which an item located aft of the datum was removed, use:

a) (+)weight X (-)arm (-)moment.
b) (-)weight X (-)arm (+)moment.
c) (-)weight X (+)arm (-)moment.
232. (Refer to Figure 11.) Find the voltage across the 8 ohm resistor:



a) 20.4 volts.
b) 8 volts.
c) 24 volts.
233. Which is correct concerning a parallel circuit?

a) Total resistance will be smaller than the smallest resistor.
b) Total resistance will decrease when one of the resis­tances is removed.
c) Total voltage drop is the same as the total resistance.
234. Hydraulic tubing, which is damaged in a localized area to such an extent that repair is necessary, may be repaired:

a) only by replacing the entire tubing using the same size and material as the original.
b) by cutting out the damaged area and utilizing a swaged tube fitting to join the tube ends.
c) by cutting out the damaged section and soldering in a replacement section of tubing.
235. (1) A detail drawing is a description of a single part.
(2) An assembly drawing is a description of an object made up of two or more parts.
Regarding the above statements:

a) neither No.1 nor NO.2 is true.
b) only No.1 is true.
c) both No.1 and No.2 are true.
236. (Refer to Figure 29.) Identify the left side viewofthe object shown.



a) 1.
b) 2.
c) 3.
237. When computing the maximum forward loaded CG of an aircraft, minimum weights, arms, and moments should be used for items of useful load that are located aft of the:

a) forward CG limit.
b) datum.
c) rearward CG limit.
238. (Refer to Figure 36.) The diameter of the holes in the finished object is:



a) 3/4 inch.
b) 31/64 inch.
c) 1/2 inch.
239. Excessive stress on fluid or pneumatic metal tubing caused by expansion and contraction due to temperature changes can best be avoided by:

a) not subjecting the aircraft to sudden changes in tem­perature.
b) using short, straight sections of tubing between fixed parts of the aircraft.
c) providing bends in the tubing.
240. In magnetic particle inspection, a flaw that is per­pendicular to the magnetic field flux lines generally causes:

a) a minimal disruption in the magnetic field.
b) a large disruption in the magnetic field.
c) no disruption in the magnetic field.
241. Typical application for zener diodes is as:

a) half-wave rectifiers.
b) voltage regulators.
c) full-wave rectifiers.
242. (Refer to Figure 40.) Determine the proper tension for a 1/8-inch cable (7 x 19) if the temperature is 80°F.



a) 80 pounds.
b) 75 pounds.
c) 70 pounds.
243. When installing bonded clamps to support metal tubing,

a) paint removal from tube is not recommended as it will inhibit corrosion.
b) remove paint or anodizing from tube at clamp location.
c) paint clamp and tube after camp installation to prevent corrosion.
244. (Refer to figure 5.) What is the impedance ac-series circuit consisting of an inductor with a reactance of 10 ohms, a capacitor with a reactance of 4 ohms, and a resistor with a resistance of 8 ohms?



a) 10 ohms.
b) 22 ohms.
c) 5.29 ohms.
245. A thermal switch, as used in an electric motor, is designed to:

a) open the circuit in order to allow cooling of the motor.
b) close the integral fan circuit to allow cooling of the motor.
c) reroute the circuit to ground.
246. The purpose of providing a space underneath the plates in a lead acid batter's cell container is to:

a) prevent sediment buildup from contacting the plates and causing a short circuit.
b) ensure that the electrolyte quantity ratio to the number of plates and plate area is adequate.
c) allow for convection of the electrolyte in order to provide for cooling of the plates.
247. In a metal tubing installation:

a) a tube may be pulled in line if the nut will start on the threaded coupling.
b) tension is undesirable because pressurization will cause it to expand and shift.
c) rigid straight line runs are preferable.
248. metal tubing fluid lines are sized by wall thickness and:

a) outside diameter in 1/16 inch increments.
b) outside diamter in 1/32 inch increments.
c) inside diameter in 1/16 inch increments.
249. Why is it considered good practice to normalize a part after welding?

a) To relieve internal stresses developed within the base metal.
b) To increase the hardness of the weld.
c) To remove the surface scale formed during welding.
250. Diodes are used in electrical power circuits primarily as:

a) switches.
b) rectifiers.
c) relays.
251. What two types of indicating mediums are available for magnetic particle inspection?

a) Wet and dry process materials.
b) High retentivity and low permeability material.
c) Iron and ferric oxides.
252. What aluminum alloy designations indicate that the metal has received no hardening or tempering treatment?

a) 6061-0.
b) 3003-F.
c) 5052-H36.
253. When reading a blueprint, a dimension is given as:

a) The maximum acceptable size is 4.390 inches.
b) The minimum acceptable size is 4.385 inches.
c) The minimum acceptable size is 4.382 inches.
254. What determines the amount of current which will flow through a battery while it is being charged by a constant voltage source?

a) The state-ot-charge of the battery.
b) The ampere-hour capacity of the battery.
c) The total plate area ot the battery.
255. (Refer to Figure 39.) Determine the cable size of a 40-foot length of single cable in free air, with a continuous rating, running from a bus to the equipment in a 28-volt system with a 15-ampere load and a 1-volt drop.



a) No.18.
b) No.11.
c) No. 10.
256. (Refer to Figure 1.) When different rated capacitors are connected in series in a circuit, the total capacitance is:



a) equal to the sum of all the capacitances.
b) less than the capacitance of the lowest rated capacitor.
c) greater than the capacitance of the highest rated capacitor.
257. The term that describes the combined resistive forces in an ac circuit is:

a) reactance.
b) impedance.
c) resistance.
258. Which condition is an indication of improperly torqued cell link connections of a nickel-cadmium battery?

a) Toxic and corrosive deposits of potassium carbonate crystals.
b) Heat or burn marks on the hardware.
c) Light spewing at the cell caps.
259. (1) Private aircraft are required by regulations to be weighed periodically.
(2) Private aircraft are required to be weighed after making any alteration.
Regarding the above statements:

a) only No. 1 is true.
b) only No.2 is true.
c) neither No.1 nor No.2 is true.
260. What tool is generally used to calibrate a microme­ter or check its accuracy?

a) Dial indicator.
b) Machinist scale.
c) Gauge block.
261. (Refer to Figure 25.) In a functional and operating circuit, the depicted logic gate's output will be 0:



a) when all inputs are 1.
b) when one or more inputs are 0.
c) only when all inputs are 0.
262. (Refer to Figure 39.) Determine the maximum length of a No. 16 cable to be installed from a bus to the equipment in a 28-volt system with a 25-ampere intermit­tent load and a 1-volt drop.



a) 10 feet.
b) 8 feet.
c) 12 feet.
263. The core material of Alclad 2024-T4 is:

a) heat-treated aluminum alloy, and the surface material is commercially pure aluminum.
b) strain-hardened aluminum alloy, and the surface material is commercially pure aluminum.
c) commercially pure aluminum, and the surface mate­rial is heat-treated aluminum alloy.
264. (Refer to Figure 28.) Identify the bottom view of the object shown.



a) 3.
b) 1.
c) 2.
265. (Refer to Figure 19.) When the throttles are re­tarded with only the right gear down, the warning horn will not sound if an open occurs in wire:



a) No.13.
b) No.6.
c) No.5.
266. (Refer to Figure 41.) Determine the fuel consump­tion with the engine operating at cruise, 2,350 RPM.



a) 51.2 pounds per hour.
b) 55.3 pounds per hour.
c) 49.2 pounds per hour.
267. When a charging current is applied to a nickel­cadmium battery, the cells emit gas only:

a) toward the end of the charging cycle.
b) when the electrolyte level is low.
c) if they are defective.
d) if they are defective.
268. Identify the correct statement.

a) Tools used on certificated aircraft must be an approved type.
b) Dividers do not provide a reading when used as a measuring device.
c) An outside micrometer is limited to measuring diameters.
269. Which tubings have the characteristics (high strength, abrasion resistance) necessary for use in a high­pressure (3,000 PSI) hydraulic system for operation of landing gear and flaps?

a) Corrosion-resistant steel annealed or 1/4H.
b) 1100-1/2H or 3003-1/2H aluminum alloy.
c) 2024-T or 5052-0 aluminum alloy.
270. What is an advantage of a double flare on aluminum tubing?

a) It is more resistant to the shearing effect of torque.
b) It is less resistant to the shearing effect of torque.
c) Ease of construction.
271. What material symbol is frequently used in draw­ings to represent all metals?

a) Cast iron.
b) Aluminum.
c) Steel.
272. (Refer to Figure 3.) When more than two inductors of different inductances are connected in parallel in a circuit, the total inductance is:



a) equal to the inductance of the highest rated inductor.
b) equal to the sum of the individual inductances.
c) less than the inductance of the lowest rated inductor.
273. Which type crack can be detected by magnetic particle inspection using either circular or longitudinal magnetization?

a) Transverse.
b) Longitudinal.
c) 45°.
274. (Refer to Figure 33.) Which material section-line symbol indicates cast iron?



a) 2.
b) 3.
c) 1.
275. To detect a minute crack using dye penetrant inspection usually requires:

a) a longer-than-normal penetrating time.
b) that the developer be applied to a flat surface.
c) the surface to be highly polished.
276. What is generally used in the construction of aircraft engine firewalls?

a) Stainless steel.
b) Magnesium-titanium alloy steel.
c) Chrome-molybdenum alloy steel.
277. A fully charged lead-acid battery will not freeze until extremely low temperatures are reached because:

a) most of the acid is in the solution.
b) increased internal resistance generates sufficient heat
c) the acid is in the plates, thereby increasing the specific gravity of the solution.
278. Which statement about Military Standard (MS) flareless fittings is correct?

a) During installation, MS flareless fittings are normally tightened by turning the nut a specified amount after the sleeve and fitting sealing surface have made contact, rather than being torqued.
b) MS flareless fittings must be tightened to a specific torque.
c) MS flareless fittings should not be lubricated prior to assembly.
279. Select the correct statement in reference to flare fittings.

a) AN fittings can easily be identified by the shoulder between the end of the threads and the flare cone.
b) AC fittings are generally replacing the older AN fittings.
c) AC and AN fittings are identical except for material composition and identifying colors.
280. How is a clevis bolt used with a fork - end cable terminal secured?

a) With a shear nut tightened to a snug fit, but with no strain imposed on the fork and safetied with a cotter pin.
b) With a shear nut and cotter pin ora thin self-locking nut tightened enough to prevent rotation of the bolt in the fork.
c) With a castle nut tightened until slight binding occurs between the fork and the fitting to which it is being attached.
281. The term "cold flow" is generally associated with:

a) vaporizing fuel.
b) rubber hose.
c) welding and sheet metal.
282. Unless otherwise specified, any values given for current or voltage in an ac circuit are assumed to be:

a) effective values.
b) instantaneous values.
c) maximum values.
283. When an empty aircraft is weighed, the combined net weight at the main gears is 3,540 pounds with an arm of 195.5 inches. At the nose gear, the net weight is 2,322 pounds with an arm of 83.5 inches.The datum line is forward of the nose of the aircraft. What is the empty CG of the aircraft?

a) 151.1.
b) 146.5.
c) 155.2.
284. How many amperes will a 28-volt generator be required to supply to a circuit containing five lamps in parallel,
three of which have a resistance of 6 ohms each and two of which have a resistance of 5 ohms each?

a) 1.11 amperes.
b) 25.23 amperes.
c) 1 ampere.
285. Which of the following methods may be suitable to use to detect cracks open to the surface in aluminum forgings and castings?
1. Dye penetrant inspection.
2. Magnetic par:ticle inspection.
3. Metallic ring (coin tap) inspection.
4. Eddy current inspection.
5. Ultrasonic inspection.
6. Visual inspection.

a) 1, 2, 3, 4, 5, 6.
b) 1, 2, 4, 5, 6.
c) 1, 4, 5, 6.
286. (Referto Figure 19.) When the landing gears are up and the throttles are retarded, the warning horn will not sound if an open occurs in wire:



a) No.5.
b) No.6.
c) No.7.
287. What happens to the current in a voltage step-up transformer with a ratio of 1 to 4?

a) The current does not change.
b) The current is stepped down by a 1 to 4 ratio.
c) The current is stepped up by a 1 to 4 ratio.
288. Flexible hose used in aircraft systems is classified in size according to the:

a) inside diameter.
b) wall thickness.
c) outside diameter.
289. (1) Schematic diagrams indicate the location of individual components in the aircraft.
(2) Schematic diagrams indicate the location of compo­nents with respect to each other within the system.
Regarding the above statements:

a) only No.1 is true.
b) both No.1 and No.2 are true.
c) only No.2 is true.
290. In performing a dye penetrant inspection, the developer:

a) acts as a blotter to produce a visible indication.
b) seeps into a surface crack to indicate the presence of a defect.
c) thoroughly cleans the surface prior to inspection.
291. Which statement is true regarding helicopter weight and balance?

a) The moment of tail-mounted components is subject to constant change.
b) Regardless of internal or external loading, lateral axis cg control is ordinarily not a factor in maintaining helicopter weight and balance.
c) Weight and balance procedures for airplanes gener­ally also apply to helicopters.
292. Where is an AN clevis bolt used in an airplane?

a) For tension and shear load conditions.
b) Only for shear load applications.
c) Where external tension loads are applied.
293. Which statement is correct when made in reference to a parallel circuit?

a) The current in amperes can be found by dividing the EMF in volts by the sum of the resistors in ohms.
b) The current is equal in all portions of the circuit.
c) The total current is equal to the sum of the currents through the individual branches of the circuit.
294. Which tool can be used to measure the alignment of a rotor shaft or the plane of rotation of a disk?

a) Protractor.
b) Dial indicator.
c) Shaft gauge.
295. In the reading of aircraft blueprints, the term "toler­ance," used in association with aircraft parts or compo­nents:

a) is the tightest permissible fit for proper construction and operation of mating parts.
b) represents the limit of galvanic compatibility between different adjoining material types in aircraft parts.
c) is the difference between extreme permissible dimen­sions that a part may have and still be acceptable.
296. In a P-N-P transistor application, the solid state device is turned on when the:

a) emitter is negative with respect to the base.
b) base is negative with respect to the emitter.
c) base is positive with respect to the emitter.
297. The electrolyte of a nickel-cadmium battery is the lowest when the battery is:

a) being charged.
b) under load condition.
c) in a discharged condition.
298. What method of magnetic particle inspection is used most often to inspect aircraft parts for invisible cracks and other defects?

a) Inductance.
b) Continuous.
c) Residual.
299. A scratch or nick in aluminum alloy tubing can be repaired by burnishing provided the scratch or nick does not:

a) exceed 20 percent of the wall thickness of the tube.
b) exceed 10 percent of the tube diameter.
c) appear in the heel of a bend in the tube.
300. Circular magnetization of a part can be used to detect which defects?

a) Defects perpendicular to the long axis of the part.
b) Defects parallel to the long axis of the part.
c) Defects perpendicular to the concentric circles of magnetic force within the part.
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