Ground Operation & Servicing

Question 1

1. During starting of a turbine powerplant using a compressed air starter, a hung start occurred. Select the proper procedure.

a. Advance power lever to increase RPM.
b. Re-engage the starter.
c. Shut the engine down.

Answer 1

c.

Question 2

2. A hung start in a jet engine is often caused by

a. malfunctions in the ignition system.
b. the starter cutting off too soon.
c. an excessively rich fuel/air mixture.

Answer 2

b.

Question 3

3. Which statement below reflects a typical requirement when towing some aircraft?

a. Discharge all hydraulic pressure to prevent accidental operation of the nosewheel steering mechanism.
b. Tailwheel aircraft must be towed backwards.
c. If the aircraft has a steerable nosewheel, the torque-link lock should be set to full swivel.

Answer 3

c.

Question 4

4. Which statement(s) is/are true regarding tiedown of small aircraft?
   (1) Manila (hemp) rope has a tendency to stretch when it gets wet.
   (2) Nylon or dacron rope is preferred to manila rope.
   (3) The aircraft should be headed downwind in order to eliminate or minimize wing lift.
   (4) Leave the nosewheel or tailwheel unlocked.

a. 1, 2, 3, and 4
b. 1 and 2
c. 2

Answer 4

c.

Question 5

5. When approaching the front of an idling jet engine, the hazard area extends forward of the engine approximately

a. 10 feet
b. 15 feet
c. 25 feet

Answer 5

c.

Question 6

6. Which of the following is the most satisfactory extinguishing agent for use on a carburetor or intake fire?

a. Dry chemical.
b. A fine, water mist.
c. Carbon dioxide.

Answer 6

c.

Question 7

8. If a radial engine has been shut down for more than 30 minutes, the propeller should be rotated through at least two revolutions to

a. check for hydraulic lock.
b. check for leaks.
c. prime the engine.

Answer 7

a.

Question 8

9. The priming of a fuel injected horizontally opposed engine is accomplished by placing the fuel control lever in the

a. IDLE-CUTOFF position.
b. AUTO-RICH position.
c. FULL-RICH position.

Answer 8

c.

Question 9

10. The most important condition to be monitored during start after fuel flow begins in a turbine engine is the

a. EGT, TIT, or ITT.
b. RPM.
c. oil pressure.

Answer 9

a.

Question 10

11. Which of the following conditions has the most potential for causing engine damage when starting or attempting to start a turbine engine?

a. Hung start.
b. Cold start.
c. Hot start.

Answer 10

c.

Question 11

12. How is a flooded engine, equipped with a float-type carburetor, cleared of excessive fuel?

a. Crank the engine with the starter or by hand, with the mixture control in cutoff, ignition switch off, and the throttle fully open, until the fuel charge has been cleared.
b. Turn off the fuel and the ignition. Discontinue the starting attempt until the excess fuel has cleared.
c. Crank the engine with the starter or by hand, with the mixture control in cutoff, ignition switch on, and the throttle fully open, until the excess fuel has cleared or until the engine starts.

Answer 11

a.

Question 12

14. Generally, when an induction fire occurs during starting of a reciprocating engine, the first course of action should be to

a. discharge carbon dioxide from a fire extinguisher into the air intake of the engine.
b. continue cranking and start the engine if possible.
c. close the throttle.

Answer 12

b.

Question 13

15. When starting and ground operating an aircraft’s engine, the aircraft should be positioned to head into the wind primarily

a. to aid in achieving and maintaining the proper air flow into the engine induction system.
b. for engine cooling purposes.
c. to help cancel out engine torque effect.

Answer 13

b.

Question 14

16. When approaching the rear of an idling turbojet or turbofan engine, the hazard area extends aft of the engine approximately

a. 200 feet
b. 100 feet
c. 50 feet

Answer 14

b.

Question 15

17. If a hot start occurs during starting of a turbine powerplant, what is the likely cause?

a. The starting unit overheated.
b. The ambient air temperature was too high (over 100 degrees F).
c. The fuel/air mixture was excessively rich.

Answer 15

c.

Question 16

18. What effect, if any, will aviation gasoline mixed with jet fuel have on a turbine engine?

a. No appreciable effect.
b. The tetraethyl lead in the gasoline forms deposits on the turbine blades.
c. The tetraethyl lead in the gasoline forms deposits on the compressor blades.

Answer 16

b.

Question 17

19. (1) Jet fuel is of higher viscosity than aviation gasoline and therefore holds contaminants better.
    (2) Viscosity has no relation to contamination of fuel.
    Regarding the above statements,

a. only No. 1 is true.
b. both No. 1 and No. 2 are true
c. neither No. 1 nor No. 2 is true

Answer 17

a.

Question 18

20. When towing a large aircraft

a. a person should be in the cockpit to watch for obstructions.
b. persons should be stationed at the nose, each wingtip, and the empennage at all times.
c. a person should be in the cockpit to operate the brakes.

Answer 18

c.

Question 19

21. Weathervaning tendency is greatest when taxiing

a. both nosewheel and tailwheel-type airplanes in a quartering tailwind.
b. a tailwheel-type airplane in a direct crosswind.
c. a nosewheel-type airplane in a quartering headwind.

Answer 19

b.

Question 20

22. When taxiing an airplane with a quartering tailwind, the elevators and

a. upwind aileron should be held in the up position.
b. upwind aileron should be held in the down position.
c. both ailerons should be kept in the neutral position.

Answer 20

b.

Question 21

23. When taxiing (or towing) an aircraft, a flashing red light from the control tower means

a. stop and wait for a green light.
b. move clear of the runway/taxiway immediately.
c. return to starting point.

Answer 21

b.

Question 22

24. A person should approach or leave a helicopter in the pilot’s field of vision whenever the engine is running in order to avoid

a. the tail rotor
b. the main rotor
c. blowing dust or debris caused by rotor downwash.

Answer 22

a.

Question 23

25. When taxiing (or towing) an aircraft, a flashing white light from the control tower means

a. move clear of the runway/taxiway immediately.
b. OK to proceed but use extreme caution.
c. return to starting point.

Answer 23

c.

Question 24

26. When taxiing (or towing) an aircraft, an alternating red and green light from the control tower means

a. move clear of the runway/taxiway immediately.
b. OK to proceed but use extreme caution.
c. return to starting point.

Answer 24

b.

Question 25

27. When stopping a nosewheel-type airplane after taxiing (or towing), the nosewheel should be left a. unlocked and pointed straight ahead. b. turned at a small angle towards uphill if the parking area is not perfectly flat. c. pointed straight ahead

Answer 25

c.

Question 26

28. When first starting to move an aircraft while taxiing, it is important to a. test the brakes. b. closely monitor the instruments. c. notify the control tower.

Answer 26

a.

Question 27

29. The color of 100LL fuel is a. blue b. colorless or straw c. red

Answer 27

a.

Question 28

30. How are aviation fuels, which possess greater antiknock qualities than 100 octane, classified? a. According to the milliliters of lead. b. By reference to normal heptane. c. By performance numbers.

Answer 28

c.

Question 29

31. Why is ethylene dibromide added to aviation gasoline? a. To remove zinc silicate deposits from the spark plugs. b. To scavenge lead oxide from the cylinder combustion chambers. c. To increase the antiknock rating of the fuel.

Answer 29

b.

Question 30

32. Both gasoline and kerosene have certain advantages for use as turbine fuel. Which statement is true in reference to the advantages of each? a. Kerosene has a higher heat energy/value per unit weight than gasoline. b. Gasoline has a higher heat energy/value per unit volume than kerosene. c. Kerosene has a higher heat energy/value per unit volume than gasoline.

Answer 30

c.

Question 31

33. What must accompany fuel vaporization? a. An absorption of heat. b. A decrease in vapor pressure. c. A reduction in volume.

Answer 31

a.

Question 32

34. Characteristics of detonation are a. cylinder pressure remains the same, excessive cylinder head temperature, and a decrease in engine power. b. rapid rise in cylinder pressure, excessive cylinder head temperature, and a decrease in engine power. c. rapid rise in cylinder pressure, cylinder head temperature normal, and a decrease in engine power.

Answer 32

b.

Question 33

35. A fuel that vaporizes too readily may cause a. hard starting. b. detonation. c. vapor lock.

Answer 33

c.

Question 34

36. Jet fuel number identifiers are a. performance numbers to designate the volatility of the fuel. b. performance numbers and are relative to the fuel's performance in the aircraft engine. c. type numbers and have no relation to the fuel's performance in the aircraft engine.

Answer 34

c.

Question 35

37. The main differences between grades 100 and 100LL fuel are a. volatility and lead content. b. volatility, lead content, and color. c. lead content and color.

Answer 35

c.

Question 36

38. Characteristics of aviation gasoline are a. high heat value, high volatility. b. high heat value, low volatility. c. low heat value, low volatility.

Answer 36

a.

Question 37

39. Tetraethyl lead is added to aviation gasoline to a. retard the formation of corrosives. b. improve the gasoline's performance in the engine. c. dissolve the moisture in the gasoline.

Answer 37

b.

Question 38

40. A fuel that does not vaporize readily enough can cause a. vapor lock. b. detonation. c. hard starting.

Answer 38

c.