2A651 CDC 3
Unit Review Exercise practice test for 2a651 cdc 3
- 1.
1. (401) What is the composition of JP–8 fuel?
- A.
Gasoline and kerosene.
- B.
Diesel fuel and AV GAS.
- C.
Diesel fuel and kerosene.
- D.
Gasoline and diesel fuel.
Correct Answer
A. Gasoline and kerosene. -
- 2.
2. (401) At room temperature, how many times longer will it take water to settle out of JP–8 than out of gasoline?
- A.
Two.
- B.
Three.
- C.
Four.
- D.
Five.
Correct Answer
C. Four. -
- 3.
3. (402) The main fuel control allows the engine to safely accelerate, reducing the possibility of
- A.
Flameout.
- B.
Turbine seizure.
- C.
Overtemperature.
- D.
Compressor shift.
Correct Answer
A. Flameout. -
- 4.
4. (402) The purpose of a fuel/oil cooler in a fuel system is to
- A.
Heat the fuel and cool the oil.
- B.
Cool the fuel and cool the oil.
- C.
Heat the fuel and heat the oil.
- D.
Cool the fuel and heat the oil.
Correct Answer
A. Heat the fuel and cool the oil. -
- 5.
5. (403) What type of fuel control uses items such as thermocouples, relays, amplifiers, and solenoids to help control a jet engine?
- A.
Pneumatic.
- B.
Fuel injection.
- C.
Hydromechanical.
- D.
Electrohydromechanical.
Correct Answer
D. Electrohydromechanical. -
- 6.
6. (403) On fuel controls that require setting during an engine trim, calibration and/or adjustment screws must be
- A.
Replaced.
- B.
Die marked.
- C.
Safety sealed and/or lockwired.
- D.
Apply a thread locking compound.
Correct Answer
C. Safety sealed and/or lockwired. -
- 7.
7. (404) When in the primary mode, what controls the operation of the F100-PW–220 engine?
- A.
MEC.
- B.
PMG.
- C.
DEEC.
- D.
DEEC.
Correct Answer
C. DEEC. -
- 8.
8. (404) On an F100-PW–220 engine, the MFC is capable of operating in how many modes?
- A.
One.
- B.
Two.
- C.
Three.
- D.
Three.
Correct Answer
B. Two. -
- 9.
9. (404) Which F100-PW–220 engine fuel system component controls pressurization of the core engine fuel system?
- A.
N2 sensor.
- B.
P&D valve.
- C.
Fuel nozzle.
- D.
Fan inlet Tt2.5 sensor.
Correct Answer
B. P&D valve. -
- 10.
10. (404) Which stage of compressor air drives the augmenter fuel pump on an F100-PW–220 engine?
- A.
7th.
- B.
10th.
- C.
13th.
- D.
14th.
Correct Answer
C. 13th. -
- 11.
11. (404) On the F100-PW–220 engine, which component controls the augmentor fuel control?
- A.
Fuel pump.
- B.
Fuel pump controller.
- C.
Signature elimination probe.
- D.
DEEC.
Correct Answer
D. DEEC. -
- 12.
12. (404) Core engine fuel flow sequence on an F100-PW–220 engine starts at the main fuel pump and then goes through the
- A.
Main fuel control, fuel/oil cooler, pressurizing and dump valve, and fuel nozzles.
- B.
Fuel/oil cooler, pressurizing and dump valve, main fuel control, and fuel nozzles.
- C.
C. augmentor fuel pump, augmentor fuel control, fuel/oil cooler, pressurizing and dump valve, and fuel nozzles.
- D.
D. augmenter fuel control augmentor fuel pump, fuel/oil cooler, pressurizing and dump valve, and fuel nozzles.
Correct Answer
A. Main fuel control, fuel/oil cooler, pressurizing and dump valve, and fuel nozzles. -
- 13.
13. (405) Operational control of the F108-CF–100 engine is achieved by the use of the power lever, fuel shut-off lever, and
- A.
Fuel pump.
- B.
Oil/fuel heat exchanger.
- C.
Air/fuel heat exchanger.
- D.
PMC.
Correct Answer
D. PMC. -
- 14.
14. (405) The F108 engine fuel pump contains a low-pressure stage (centrifugal boost stage) and a high-pressure
- A.
Gear stage.
- B.
Gerotor stage.
- C.
Axial boost stage.
- D.
Sliding vane stage.
Correct Answer
A. Gear stage. -
- 15.
15. (405) On an F108-CF–100 engine, the fuel injectors contain
- A.
Only primary fuel flow passages.
- B.
Only secondary fuel flow passages.
- C.
Both primary and secondary fuel flow passages.
- D.
Primary, secondary, and auxiliary fuel flow passages.
Correct Answer
C. Both primary and secondary fuel flow passages. -
- 16.
16. (406) What supplies the AE2100D3 FADEC with power until engine RPM is sufficient for the alternator stator to take control?
- A.
Airplane 28 VDC power supply.
- B.
NIU.
- C.
MIL-STD–1553B data bus.
- D.
Mission computer.
Correct Answer
A. Airplane 28 VDC power supply. -
- 17.
17. (406) What component is controlled by the AE2100D3 FADEC through the ENGINE START switch for normal engine shutdown or by the fire control handle for emergency shutdown?
- A.
Servo valve.
- B.
Fuel check valve.
- C.
Electric shutoff valve.
- D.
Latching shutoff valve.
Correct Answer
D. Latching shutoff valve. -
- 18.
18. (407) On the T56 engine, how many and what type of fuel pumps are contained in the fuel pump and filter assembly?
- A.
3 gear; 1 boost.
- B.
2 gear; 2 boost.
- C.
2 gear; 1 boost.
- D.
1 gear; 2 boost.
Correct Answer
C. 2 gear; 1 boost. -
- 19.
19. (407) What T56 engine controls the rotary movement of the fuel control metering valve?
- A.
Temperature.
- B.
Engine speed.
- C.
Throttle position.
- D.
Compressor inlet pressure.
Correct Answer
D. Compressor inlet pressure. -
- 20.
20. (407) On the T56 engine, what compares the desired throttle setting from the coordinator with the actual TIT signal from the thermocouples
- A.
TD valve.
- B.
Speed-sensitive control.
- C.
TD potentiometers.
- D.
TD amplifier.
Correct Answer
D. TD amplifier. -
- 21.
21. (407) Which T56 engine component sends the fuel to the fuel manifold?
- A.
TD valve.
- B.
Main fuel pump.
- C.
TD amplifier.
- D.
Fuel control.
Correct Answer
A. TD valve. -
- 22.
22. (407) When the null orifice on the T56 engine TD valve is set at zero, how much fuel will the valve bypass?
- A.
0%.
- B.
10%.
- C.
20%.
- D.
30%.
Correct Answer
C. 20%. -
- 23.
23. (407) In addition to the visual inspection the T–56 engine fuel nozzle also requires what type of inspection?
- A.
Nondestructive.
- B.
Spray pattern.
- C.
Pre-torque.
- D.
Ultrasonic.
Correct Answer
B. Spray pattern. -
- 24.
24. (408) Which type of oil cooler operates on the same principle as a radiator in an automobile?
- A.
Air.
- B.
Fuel.
- C.
Hydraulic.
- D.
Pneumatic.
Correct Answer
A. Air. -
- 25.
25. (408) When an engine is not operating, static preload for a carbon oil seal is provided by
- A.
Air pressure.
- B.
Oil pressure.
- C.
Spring pressure.
- D.
Hydraulic pressure.
Correct Answer
C. Spring pressure. -
- 26.
26. (409) The F100-PW–100 engine oil pressure varies with N2 speed, engine inlet oil temperature, and
- A.
Oil jet pressure.
- B.
Fan turbine speed.
- C.
Oil nozzle condition.
- D.
Number of oil jets used.
Correct Answer
C. Oil nozzle condition. -
- 27.
27. (409) What term is used to indicate that air is being mixed with the oil in the oil pump to create pockets of air?
- A.
Aeration.
- B.
Induction.
- C.
Convection.
- D.
Compression.
Correct Answer
A. Aeration. -
- 28.
28. (409) In an engine oil tank, which device separates the air from the oil?
- A.
Aerator.
- B.
Deaerator.
- C.
Check valve.
- D.
Bypass valve.
Correct Answer
B. Deaerator. -
- 29.
29. (409) Which type of oil system stores the oil in a tank fitted to the side of the engine?
- A.
Wet sump.
- B.
Dry sump.
- C.
Hot tank.
- D.
Cold tank.
Correct Answer
B. Dry sump. -
- 30.
30. (409) Which type of oil system design places the oil cooler in the pressure subsystem?
- A.
Wet tank.
- B.
Dry tank.
- C.
Hot tank.
- D.
Cold tank.
Correct Answer
C. Hot tank. -
- 31.
31. (410) On an F100 engine, the breather pressurizing valve is internally mounted in the
- A.
Oil tank.
- B.
Gearbox.
- C.
Gearbox.
- D.
Gearbox.
Correct Answer
B. Gearbox. -
- 32.
32. (410) On an F100-PW–220 engine, the air/oil coolers are mounted on the fan duct and use
- A.
Secondary fan airflow as a coolant.
- B.
Secondary fan airflow as an oil heater.
- C.
Primary core engine airflow as a coolant.
- D.
Primary core engine airflow as an oil heater.
Correct Answer
A. Secondary fan airflow as a coolant. -
- 33.
33. (410) On an F100-PW–220 engine, what component permits oil to bypass the oil filter during cold weather starts?
- A.
Oil relief valve.
- B.
Filter bypass valve.
- C.
Filter poppet valve.
- D.
Oil pressure transmitter tap.
Correct Answer
B. Filter bypass valve. -
- 34.
34. (411) What is used to check the oil level in a F108-CF–100 engine?
- A.
Sight gauge on the oil tank.
- B.
Flight station oil level gauge.
- C.
Filler cap with a graduated gauge.
- D.
Graduated marking on the outside of the tank.
Correct Answer
C. Filler cap with a graduated gauge. -
- 35.
35. (412) Approximately how many GPM does the AE2100D3 PUAD lube and scavenge pump provide at engine PTO?
- A.
3.
- B.
5.
- C.
7.
- D.
9.
Correct Answer
B. 5. -
- 36.
36. (412) What AE2100D3 component drives the PGB lube and scavenge pump?
- A.
Alternator stator.
- B.
PGB.
- C.
PUAD.
- D.
GMAD.
Correct Answer
D. GMAD. -
- 37.
37. (413) Which type of oil pump is used on the T56 engine?
- A.
Gear.
- B.
Float.
- C.
Gerotor.
- D.
Centrifugal.
Correct Answer
A. Gear. -
- 38.
38. (413) The amount of ram air passing through the oil cooler core is regulated by the
- A.
Thermostat.
- B.
Flap actuator.
- C.
Size of the core.
- D.
Regulating valve.
Correct Answer
B. Flap actuator. -
- 39.
39. (413) Bleed air flowing through which component increases airflow through the cooler?
- A.
Flap actuator.
- B.
Oil cooler flap.
- C.
Augmentation valve.
- D.
Augmentation ejector.
Correct Answer
D. Augmentation ejector. -
- 40.
40. (413) The valve that allows fluid to flow in only one direction is the
- A.
Check.
- B.
Relief.
- C.
Bypass.
- D.
Pressurizing.
Correct Answer
A. Check. -
- 41.
41. (413) In the power unit oil system, the dual-port oil jet mounted on the front side of the compressor air inlet housing is used to lubricate the
- A.
Mid and center sleeve bearings.
- B.
Torquemeter and compressor front bearings.
- C.
Torquemeter and compressor front bearings.
- D.
Torquemeter and compressor front bearings.
Correct Answer
A. Mid and center sleeve bearings. -
- 42.
42. (413) The power section and RGB oil systems are joined together at the
- A.
Fuel heater and strainer.
- B.
External scavenge oil filter.
- C.
External scavenge oil pump.
- D.
Scavenge element of the main pump.
Correct Answer
B. External scavenge oil filter. -
- 43.
43. (413) Which RGB component prevents oil in the oil tank from draining into the RGB rear case?
- A.
Shutoff valve.
- B.
Oil pump and filter.
- C.
Oil pump check valve.
- D.
Oil pump bypass valve.
Correct Answer
C. Oil pump check valve. -
- 44.
44. (413) How many scavenge oil pumps are located in the RGB?
- A.
1.
- B.
2.
- C.
3.
- D.
4.
Correct Answer
B. 2. -
- 45.
45. (414) The journeyman must be aware of which hazardous property of modern jet engine oil?
- A.
Toxicity.
- B.
Viscosity.
- C.
Alkalinity.
- D.
Corrosiveness.
Correct Answer
D. Corrosiveness. -
- 46.
46. (415) The primary benefit of identifying an impending failure through the OAP is
- A.
Improved safety.
- B.
Increased component life.
- C.
Reduced maintenance cost.
- D.
Increased equipment availability.
Correct Answer
A. Improved safety. -
- 47.
47. (415) Who is responsible for ensuring that the OAP operates properly?
- A.
Project monitor.
- B.
Logistics commander
- C.
Propulsion flight chief.
- D.
Laboratory supervisor.
Correct Answer
A. Project monitor. -
- 48.
48. (415) What are microscopic metallic particles in the oil system called?
- A.
Wear metals.
- B.
Friction metals.
- C.
Precious metals.
- D.
Transformation metals.
Correct Answer
A. Wear metals. -
- 49.
49. (415) Oil sampling intervals should not vary by more than
- A.
5 percent.
- B.
10 percent.
- C.
15 percent.
- D.
20 percent.
Correct Answer
B. 10 percent. -
- 50.
50. (415) The SEM/EDX analysis process differs from conventional oil analysis in which major aspect?
- A.
SEM/EDX samples must be sent off-site for analysis.
- B.
SEM/EDX particles must be oil free for analysis to take place.
- C.
SEM/EDX provides results concerning equipment and components condition.
- D.
SEM/EDX samples can only be obtained in an intermediate maintenance shop.
Correct Answer
B. SEM/EDX particles must be oil free for analysis to take place. -
Quiz Review Timeline +
Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.
-
Current Version
-
Jan 31, 2013Quiz Edited by
ProProfs Editorial Team -
Nov 17, 2011Quiz Created by
Spalliero
- ACA Quizzes
- ACCA Quizzes
- ACE Quizzes
- BCBA Quizzes
- CCP Quizzes
- CDCs Quizzes
- CEH Quizzes
- CISA Quizzes
- CISCO Quizzes
- CISSP Quizzes
- CompTIA Quizzes
- CPA Quizzes
- CPAT Quizzes
- CPFA Quizzes
- CPP Quizzes
- CPT Quizzes
- CSA Quizzes
- CSET Quizzes
- CST Quizzes
- CSWIP Quizzes
- FTCE Quizzes
- HIPAA Quizzes
- IAHCSMM Quizzes
- ISTQB Quizzes
- LEED Ga Quizzes
- MBLEx Quizzes
- TEAS Quizzes
Back to top