P Post-test 1 (Aircraft Construction, Repair, and Modification)

1. What may be used as a lubricant on oxygen system tapered pipe thread connections?

A. Silicone dielectric compound.

B. Glycerine.

C. Teflon tape.

D. All of the above

C. Teflon tape

2. Which characteristics apply to aircraft hydraulic systems?

1. Minimum maintenance requirements.

2. Lightweight.

3. About 80 percent operating efficiency (20 percent loss due to fluid friction).

4. Simple to inspect.

A. 1, 2, 3, 4.

B. 1, 3, 4.

C. 1, 2, 4.

D. None of the above

C. 1, 2, 4

3. In some fire-extinguishing systems, evidence that the system has been intentionally discharged is indicated by the absence of a

A. red disk on the side of the fuselage.

B. green disk on the side of the fuselage.

C. yellow disk on the side of the fuselage.

D. None of the above

C. yellow disk on the side of the fuselage

4. When a piece of aluminum alloy is to be bent using a minimum radius for the type and thickness of material,

A. the piece should be bent slowly to eliminate cracking.

B. the layout should be made so that the bend will be 90 degrees to the grain of the sheet.

C. less pressure than usual should be applied with the movable (upper) clamping bar.

D. All of the above

B. the layout should be made so that the bend will be 90 degrees to the grain of the sheet

5. The purpose of a rectifier in an electrical system is to change

A. the frequency of alternating current.

B. direct current to alternating current.

C. alternating current to direct current.

D. All of the above

C. alternating current to direct current

6. What is descriptive of the annealing process of steel during and after it has been annealed?

A. Rapid cooling; high strength.

B. Slow cooling; low strength.

C. Slow cooling; increased resistance to wear.

D. All of the above

B. Slow cooling; low strength

7. What may be used to clean deicer boots?

A. Unleaded gasoline or Jet A fuel.

B. Naphtha.

C. Soap and water.

D. All of the above

C. Soap and water

8. Oil canning of the sides of aluminum or steel electrical junction boxes is considered to be

A. normal operation in vibration prone areas.

B. a shorting hazard.

C. acceptable operation.

D. All of the above

B. a shorting hazard

9. Caustic cleaning products used on aluminum structures have the effect of producing

A. passive oxidation.

B. improved corrosion resistance.

C. corrosion.

D. None of the above

C. corrosion

10. A pressurization controller uses

A. bleed air pressure, outside air temperature, and cabin rate of climb.

B. barometric pressure, cabin altitude, and cabin rate of change.

C. cabin rate of climb, bleed air volume, and cabin pressure.

D. All of the above

B. barometric pressure, cabin altitude, and cabin rate of change

11. Most variable displacement hydraulic pumps of current design

A. must be driven at a nearly constant speed in order to be practical for use.

B. are not practical for use with a closed-center hydraulic system.

C. contain a built-in means of system pressure regulation.

D. None of the above

C. contain a built-in means of system pressure regulation

12. In performing a dye penetrant inspection, the developer

A. seeps into a surface crack to indicate the presence of a defect.

B. acts as a blotter to produce a visible indication.

C. thoroughly cleans the surface prior to inspection.

D. None of the above

B. acts as a blotter to produce a visible indication

13. What should be checked when a shock strut bottoms during a landing?

A. Air pressure.

B. Packing seals for correct installation.

C. Fluid level.

D. All of the above

C. Fluid level

14. Finishing tape (surface tape) is used for what purpose?

A. To help prevent 'ripple formation' in covering fabric.

B. To provide additional wear resistance over the edges of fabric forming structures.

C. To provide additional anti-tear resistance under reinforcement tape.

D. None of the above

B. To provide additional wear resistance over the edges of fabric forming structures

15. The operation of an angle-of-attack indicating system is based on detection of differential pressure at a point where the airstream flows in a direction

A. not parallel to the true angle of attack of the aircraft.

B. parallel to the angle of attack of the aircraft.

C. parallel to the longitudinal axis of the aircraft.

D. All of the above

A. not parallel to the true angle of attack of the aircraft

16. Which of the following causes of aircraft magnetic compass inaccuracies may be compensated for by mechanics?

A. Deviation.

B. Magnetic compass current.

C. Variation.

D. None of the above

A. Deviation

17. A hydraulic system operational check during ground runup of an aircraft indicates that the wing flaps cannot be lowered using the main hydraulic system, but can be lowered by using the emergency hand pump. Which is the most likely cause?

A. The flap selector valve has a severe internal leak.

B. The pressure accumulator is not supplying pressure to the system.

C. The fluid level in the reservoir is low.

D. None of the above

C. The fluid level in the reservoir is low

18. The shop head of a rivet should be

A. one and one-half times the diameter of the rivet shank.

B. one-half times the diameter of the rivet shank.

C. one and one-half times the diameter of the manufactured head of the rivet.

D. None of the above

A. one and one-half times the diameter of the rivet shank

19. Which part(s) of a semi-monocoque fuselage prevent(s) tension and compression from bending the fuselage?

A. The fuselage covering.

B. Longerons and stringers.

C. Bulkheads and skin.

D. None of the above

B. Longerons and stringers

20. MS20426AD-6-5 indicates a countersunk rivet which has

A. a shank length of 5/16 inch (excluding head).

B. a shank length of 5/32 inch (excluding head).

C. an overall length of 5/16 inch.

D. All of the above

C. an overall length of 5/16 inch

21. Using a hand pump, pressure of 100 PSI has been built up in a hydraulic system. The hand pump piston is 1 inch in diameter. A 1/2-inch line connects the hand pump to an actuating cylinder 2 inches in diameter. What is the pressure in the line between the hand pump and the actuator?

A. 100 PSI.

B. 150 PSI.

C. 200 PSI.

D. None of the above

A. 100 PSI

22. Why are centrifugal-type boost pumps used in fuel systems of aircraft operating at high altitude?

A. Because they are positive displacement pumps.

B. To supply fuel under pressure to engine-driven pumps.

C. To permit cooling air to circulate around the motor.

D. All of the above

B. To supply fuel under pressure to engine-driven pumps

23. How do deicer boots help remove ice accumulations?

A. By preventing the formation of ice.

B. By breaking up ice formations.

C. By allowing only a thin layer of ice to build up.

D. All of the above

B. By breaking up ice formations

24. What is used to flush a system normally serviced with MIL-H-5606 hydraulic fluid?

A. Methyl ethyl ketone or kerosene.

B. Naphtha or varsol.

C. Lacquer thinner or trichlorethylene.

D. All of the above

B. Naphtha or varsol

25. Mild steel rivets are used for riveting

A. nickel-steel parts.

B. magnesium parts.

C. steel parts.

D. All of the above

C. steel parts

26. The purpose of a diaphragm in a vane-type fuel pump is to

A. equalize fuel pressure at all speeds.

B. vary fuel pressure according to throttle setting.

C. compensate fuel pressures to altitude changes.

D. All of the above

C. compensate fuel pressures to altitude changes

27. One purpose of a jet pump in a pressurization and air-conditioning system is to

A. produce a high pressure for operation of the out-flow valve.

B. provide for augmentation of airflow in some areas of the aircraft.

C. assist in the circulation of freon.

D. None of the above

B. provide for augmentation of airflow in some areas of the aircraft

28. What should be the included angle of a twist drill for soft metals?

A. 118 degrees.

B. 90 degrees.

C. 65 degrees.

D. None of the above

B. 90 degrees

29. When dope-proofing the parts of the aircraft structure that come in contact with doped fabric, which of the following provide an acceptable protective coating?

1. Aluminum foil.

2. Resin impregnated cloth tape.

3. Any one-part type metal primer.

4. Cellulose tape.

A. 1 and 2.

B. 3 and 4.

C. 1 and 4.

D. All of the above

C. 1 and 4

30. A flexible sealing element subject to motion is a

A. compound.

B. packing.

C. gasket.

D. All of the above

B. packing

31. Which statement is true regarding paint system compatibility?

A. Old-type zinc chromate primer may not be used directly for touchup of bare metal surfaces.

B. Acrylic nitrocellulose lacquers may be used over old nitrocellulose finishes.

C. Old wash primer coats may be overcoated directly with epoxy finishes.

D. None of the above

B. Acrylic nitrocellulose lacquers may be used over old nitrocellulose finishes

32. 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 inch.

C. 1/4 inch.

D. None of the above

A. 1/2 inch

33. The nominal rating of electrical switches refers to continuous

A. current rating with the contacts open.

B. voltage rating with the contacts closed.

C. current rating with the contacts closed.

D. None of the above

C. current rating with the contacts closed

34. The probe of a capacitance-type fuel level gauge is essentially a

A. float-actuated variable capacitor.

B. capacitor with fuel and air acting as one plate.

C. capacitor with fuel and air acting as a dielectric.

D. None of the above

C. capacitor with fuel and air acting as a dielectric

35. What is the purpose of a float-operated transmitter installed in a fuel tank?

A. It sends an electric signal to the fuel quantity indicator.

B. It senses the total amount of fuel density.

C. It senses the dielectric qualities of fuel and air in the tank.

D. All of the above

A. It sends an electric signal to the fuel quantity indicator

36. Where would you find precise information to perform a symmetry alignment check for a particular aircraft?

A. Aircraft Specification or Type Certificate Data Sheet.

B. Manufacturer's service bulletins.

C. Aircraft service or maintenance manual.

D. All of the above

C. Aircraft service or maintenance manual

37. Chatter in a hydraulic system is caused by

A. excessive system pressure.

B. insufficient system pressure.

C. air in the system.

D. All of the above

C. air in the system

38. When an airplane's primary flight control surfaces are set for a particular phase of flight, such as landing or takeoff, the corresponding control-surface indicating system will show

A. flap/slat position.

B. speed break position.

C. trim position.

D. All of the above

C. trim position

39. Before applying a protective coating to any unpainted clean aluminum, you should

A. wipe the surface with avgas or kerosene.

B. remove any conversion coating film.

C. avoid touching the surface with bare hands.

D. None of the above

C. avoid touching the surface with bare hands

40. The best safeguards against heat buildup in aircraft tires are

A. proper tire inflation, minimum braking, and ground rolls into the wind.

B. short ground rolls, slow taxi speeds, minimum braking, and proper tire inflation.

C. minimum braking, proper tire inflation, and long ground rolls.

D. None of the above

B. short ground rolls, slow taxi speeds, minimum braking, and proper tire inflation

41. What component of a pressurization system prevents the cabin altitude from becoming higher than airplane altitude?

A. Cabin rate-of-descent control.

B. Negative pressure relief valve.

C. Positive pressure relief valve.

D. None of the above

B. Negative pressure relief valve

42. When an aircraft's oxygen system has developed a leak, the lines and fittings should be

A. removed and replaced.

B. inspected using a special oxygen system dye penetrant.

C. bubble tested with a special soap solution manufactured specifically for this purpose.

D. All of the above

C. bubble tested with a special soap solution manufactured specifically for this purpose

43. The side clearances of piston rings are measured with a

A. micrometer caliper gauge.

B. thickness gauge.

C. dial gauge.

D. None of the above

B. thickness gauge

44. When fabricating parts from Alclad 2024-T3 aluminum sheet stock,

A. bends should be made with a small radius to develop maximum strength.

B. all bends must be 90 degrees to the grain.

C. all scratches, kinks, tool marks, nicks, etc., must be held to a minimum.

D. All of the above

C. all scratches, kinks, tool marks, nicks, etc., must be held to a minimum

45. When approved, splices may be used to repair manufactured harnesses or installed wiring. The maximum number of splices permitted between any two connectors is

A. one.

B. two.

C. three.

D. All of the above

A. one

46. One advantage of electrical and electronic fuel quantity indicating systems is that the indicator

A. can be located any distance from the tank(s).

B. has no movable devices.

C. always measures volume instead of mass.

D. None of the above

A. can be located any distance from the tank(s)

47. Which rivet is used for riveting magnesium alloy structures?

A. Mild steel.

B. 5056 aluminum.

C. Monel.

D. None of the above

B. 5056 aluminum

48. In gas welding, the amount of heat applied to the material being welded is controlled by the

A. amount of gas pressure used.

B. size of the tip opening.

C. distance the tip is held from the work.

D. All of the above

B. size of the tip opening

49. The pneumatic (reed) type stall warning system installed in some light aircraft is activated by

A. static air pressure.

B. positive air pressure.

C. negative air pressure.

D. None of the above

C. negative air pressure

50. Composite fabric material is considered to be the strongest in what direction?

A. Fill.

B. Warp.

C. Bias.

D. None of the above

B. Warp