2A651: Aircraft Jet Engine Maintenance! Trivia Quiz

1. If you must torque a sequence of three or more bolts,

Use maximum torque.

Use a staggered sequence.

Torque from left to right.

Overtorque,lossen,and retorque.

2. Carrying a hand tool in your pocket is potentially hazardous because it could cause

Electrical shock.

Torn clothing.

Injury to you.

Damage to the tool.

3. Which factor is not considered for borescope operator certification?

Age.

Rank.

Maturity.

Experience.

4. What should you use for cleaning measuring tools?

WD-40.

Trychlorethlene.

Turbo-super-carb.

Dry-cleaning solvent.

5. Light is transmitted to the tip of a borescope by

The fiber optics.

An optical illusion bundle.

A grounded extension cord.

A directly magnified light source.

6. What would you use to hold your tools when you cannot locate your toolbox within arm's reach?

Ziplock bag.

Toolbag.

FOD bag.

Parts bag.

7. What type of rule should you use for measuring an inside diameter?

Slide caliper.

6-inch steel.

Narrow.

Hook.

8. The type of borescope that uses miniature TV camera images is a

Videoimagescope.

Riged borescope.

Flexible scope.

Fibrescope

9. Why should dust caps be installed over tub ends rather inside them?

Provides a tighter fit.

Prevents nicking of inner tube surface.

Avoids possibility of leaving caps installed.

Provides less contact with corrosive lubricants.

10. What is the purpose of a borescope inspection on an engine?

Replace a teardown inspection.

Visually inspect internal cavities.

Detect major damage inside the engine.

Determine how much maintenance is required during a periodic inspection.

11. When installing a self-taping screw, the hole must be

Slightly smaller than the screw.

The same size as the screw shank.

Slightly deeper than the length of the shank.

Slightly shallower than the lenght

12. To prevent damage to the soft metal surfaces and a lock washer is required,what should you use?

Plain washer underneath the lock washer.

Soft lock washer.

Special washer.

Crush washer.

13. When lockwiring,how many twists per inch are required to produce the proper stiffness?

6 to 8.

8 to 10.

10 to 12.

12 to 14.

14. What type of washer is used to prevent corrosion of dissimlar metals?

Plain.

Lock.

Star.

Tab.

15. What are the type(s) of view(s) available with the rigid borescope?

Direct.

Axisymetrical.

Direct and lateral.

60 degrees up and 180 degrees down.

16. Copper tubing is not used on jet engines because it

Is expensive.

Is too flexible.

Has a high-fatigue factor.

Has extremely high tensile strength.

17. Proper bolt length allows a minimum of how many threads protruding the nut?

1.

2.

3.

4.

18. You adjust a micrometer by turning the

Barrel.

Spindle.

Frame.

Thimble.

19. Which nuts should never be used in areas where the temprature exceeds 250 F

Plain nuts.

Wing nuts.

Metallic self-locking nuts.

Nonmetallic self-locking nuts.

20. For a straight piece of tubing to remain serviceable, a dent must be less than what percentage of the tubing diameter?

20.

25.

30

35r

21. The vernier scale on a micrometer is used to read measurements in

Hundredths of an inch.

Thousandths of an inch.

Ten-thousandths of an inch.

Hundred thousandths of an inch.

22. The Fluke 8025A multimeter control that is used to set the meter to check for AC and DC is the

Function selector.

Range-mode pushbutton switch.

Touch-hold pushbutton switch.

Volts,ohms,diode test input jack.

23. When operating a borescope,what part of the borescope illuminates the interior of the area you are inspecting?

Light guid tube.

Control unit.

Distal tip light guides.

Bending section lever.

24. The grip length of a bolt should be a few thousandths of an inch shorter than the material it is holding to

Allow for the installation of a washer.

Keep the nut from backing loose.

Allow for expansion of the metal.

Avoid bottoming out the nut.

25. You can identify the various systems lines used to transfer fluids and gases on the jet engines by

Their international orange color.

The different colors of the tubing or hoses.

The specifications embossed on the tubing or hoses.

The coded bands of colored tape placed around the tubing or hoses.

26. To avoid rust,Measuring tools should never be stored where the relative humidity exceeds what percentage?

10.

20.

40.

50.

27. The lenght of a torque extension is determined by the distance between the center of the square drive and the center of the

Lock.

Grip.

Shaft index line.

Broached opening.

28. Micrometers are generally used to make measurements to an accuracy of

One sixteenth of an inch.

One one-hundredth of an inch.

One one-thousandth of an inch.

One ten-thousandth of an inch.

29. The longest calibrated movement between the spindle and anvil of an outside micrometer is

1 inch.

2 inches.

3 inches.

4 inches.

30. What is the maximum voltage that can be measured if the range button is set at 30 on Fluke 8025A multimeter?

28.

30.

32.

34.

31. How is a screw length measured?

Thread length of the treads.

Base of the head to the bottom of the threads

Length of the shank plus the threaded portion.

Top of the head to the bottom of the screw threads.

32. What feature is common to all dial indicators?

Construction of indicator.

Construction of indicating hand.

Ability to amplify movement greatly.

Ability to amplify movement slightly.

33. What type of bolt is used primarily in high-tension applications?

Clevis.

Hex head.

Special purpose.

Internal wrenching.

34. What type of hoses should you never use oil as an aid to installing?

Hydraulic.

Pneumatic.

Self-sealing.

High-pressure.

35. What numerical value is given to a fitting used on tubing that measures 3/8 inch?

2.

4.

6.

8.

36. Where is the contact point on a dial indicator located?

On the dial face.

At the end of the anvil.

At the end of the thimble.

At the end of a pivoted lever.

37. How many range settings does the Fluke 8025A multimeter have?

2.

3.

4.

5.

38. What type of pin is used in joints that carry shear loads and where the absence of clearance is essential?

Tapered.

Flathead.

Cotter.

Shear.