BLOCK 8 FINAL EXAM REVIEW AIM UPDATED ACTUAL QUESTIONS AND CORRECT ANSWERS

BLOCK 8 FINAL EXAM REVIEW AIM UPDATED ACTUAL
QUESTIONS AND CORRECT ANSWERS

Question:
1. Instructions concerning the type of fluid and amount of air pressure to be put in a shock strut are found
Answer:
On an information plate on the shock strut

Question:
2. The internal resistance of a fluid which tends to prevent it from flowing is called
Answer:
Viscosity

Question:
3. The fusible plugs installed in some aircraft wheels will
Answer:
melt at a specified elevated temperature

Question:
4. Quick disconnect couplings in hydraulic systems provide a means of
Answer:
quickly connecting and disconnecting hydraulic lines without loss of fluid or entrance of air into the
system.

Question:
5. Overinflated aircraft tires may cause damage to the
Answer:
wheel flange

Question:
6. Hot compressor bleed air operates the conditioned air system on some turbine aircraft, how is cold air
supplied?
Answer:
by the air cycle machine turbine.

Question:
7. Excessive wear in the shoulder area of an aircraft tire is an indication of
Answer:
underinflation

Question:
8. Nose gear centering cams are used in many retractable landing gear systems. The primary purpose of the
centering device is to
Answer:
center the nosewheel before it enters the wheel well.

,Question:
9. Pneumatic systems utilize
Answer:
relief valves

Question:
10. A flexible hydraulic hose identified as MIL-H-8788 will have a stripe running the length of the hose.
This stripe
Answer:
is used to ensure that the hose is installed without excessive twisting.

Question:
11. What is the purpose of using backup rings with O rings in hydraulic systems above 1,500 PSI?
Answer:
Prevent high pressure from extruding the seal between the moving and stationary part.

Question:
12. Why do tires and wheel manufacturers often recommend that the tires on split rim wheels be deflated
before removing the wheel from the axle?
Answer:
As a safety precaution in case the bolts that hold the wheel halves together have been damaged or
weakened.

Question:
13. A sleeve, spacer, or bumper ring is incorporated in a landing gear oleo shock strut to
Answer:
limit the extrusion stroke

Question:
14. 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
Answer:
1, 2, 4

Question:
15. When hydraulic system pressure control and relief units fail to function properly, how are most
systems protected against overpressure?
Answer:
A shear section on the main hydraulic pump drive shaft.

, Question:
16. Which of the following is adversely affected by atmospheric humidity is left unprotected?
1. MIL-H-5606 hydraulic fluid
2. Skydrol hydraulic fluid
3. None of the above
Answer:
2.

Question:
17. What is the main purpose of a pressurized reservoir in a hydraulic system?
Answer:
Prevent hydraulic pump cavitation.

Question:
18. How can it be determined that a vapor cycle cooling system is charged with the proper amount of
Freon?
Answer:
Air bubbles in the sight glass disappear.

Question:
19. The correct inflation pressure for an aircraft tire can be obtained from
Answer:
the aircraft service manual.

Question:
20. Phosphate ester base hydraulic fluid is very susceptible to contamination from
Answer:
water in the atmosphere

Question:
21. Debooster valves are used in brake systems primarily to
Answer:
reduce the pressure and release the brakes rapidly.

Question:
22. Which seal/material is used with phosphate ester base hydraulic fluids?
Answer:
Butyl rubber

Question:
23. Many brake types can be adapted to operate mechanically or hydraulically. Which type is not adaptable
to mechanical operation?
Answer:
Expander tube type

Question:
24. Where is the landing gear safety switch usually located?