AP GN Ground Operation and Servicing

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

Shut off the fuel.
Re-engage the starter.
Shut the engine down.

A hung start in a jet engine is often caused by

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

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

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

Which statement is true regarding tiedown of small aircraft?

The aircraft should be headed downwind in order to eliminate or minimize wing lift.
Leave the nosewheel or tailwheel unlocked.
Nylon or dacrron rope is preferred to manila rope.

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

10 feet.
15 feet.
25 feet.

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

Dry chemical.
A fine, water mist.
Carbon dioxide.

Refer to Figure 50. Identify the signal to engage rotor on a rotorcraft.

1
3
2

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

check for hydraulic lock.
check for leaks.
prime the engine.

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

IDLE-CUTOFF position
AUTO-RICH position
FULL-RICH position

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

EGT, TIT, or ITT
RPM
oil pressure.

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

Hung start.
Cold start.
Hot start.

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

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.
Turn off the fuel and the ignition. Discontinue the starting attempt until the excess fuel has cleared.
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.

Refer to Figure 51. Which marshalling signal should be given if a taxiing aircraft is in imminent danger of striking an object?

1 or 3
2
3

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

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

If a fire develops in an engine during the starting procedure, you should

discontinue the start attempt and allow the fireguard to extinguish the fire.
continue cranking to start the engine and extinguish the fire.
continue cranking and allow the fireguard to extinguish the fire.

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

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

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

200 feet.
100 feet.
50 feet.

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

The starting unit overheated.
The ambient air temperature was too high (over 10 degrees F).
The fuel/air mixture was excessively rich.

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

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

(1) Jet fuel is of higher viscosity than aviation gasoline and therefore holds contaminants more readily.

(2) Viscosity has no relation to contamination of fuel.

Regarding the above statements,

only 1 is true.
both 1 and 2 are true.
neither 1 nor 2 is true.

When towing a large aircraft

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

Weathervaning tendency is greatest when taxiing

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

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

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

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

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

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

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

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

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

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

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

When stopping a nosewheel-type airplane after taxiing, the nosewheel should be left

unlocked and pointed straight ahead.
turned at a small angle towards uphill if the parking area is not perfectly flat.
pointed straight ahead.

When first starting to move an aircraft while taxiing, it is important to

test the brakes.
closely monitor the instruments.
notify the control tower.

The color of 100LL fuel is

blue.
colorless or straw.
red.

How are aviation fuels, which possess greater antiknock qualities than 100 octane, classified?

According to the milliliters of lead.
By reference to normal heptane.
By performance numbers.

Why is ethylene dibromide added to aviation gasoline?

To remove zinc silicate deposits from the spark plugs.
To scavenge lead oxide from the cylinder combustion chambers.
To increase the antiknock rating of the fuel.

Both gasoline and kerosene have certain advantages for use as turbine fuel. Which statement is true in reference to the advantages of each?

Kerosene has a higher heat energy value per unit weight than gasoline.
Gasoline has a higher heat energy value per unit volume than kerosene.
Kerosene has a higher heat energy/value per unit volume than gasoline.

What must accompany fuel vaporization?

An absorption of heat.
A decrease in vapor pressure.
A reduction in volume.

Characteristics of detonation are

cylinder pressure remains the same, excessive cylinder head temperature, and a decrease in engine power.
rapid rise in cylinder pressure, excessive cylinder head temperature, and a decrease in engine power.
rapid rise in cylinder pressure, cylinder head temperature normal, and a decrease in engine power.

A fuel that vaporizes too readily may cause

hard starting.
detonation.
vapor lock.

Jet fuel number identifiers are

performance numbers to designate the volatility of the fuel.
performance numbers and are relative to the fuel’s performance in the aircraft engine.
type numbers and have no relation to the fuel’s performance in the aircraft engine.

The main differences between grades, 100 and 100LL, fuel are

volatility and lead content.
volatility, lead content, and color.
lead content and color.

Characteristics of aviation gasoline are

high heat value, high volatility.
high heat value, low volatility.
low heat value, low volatility.

Tetraethyl lead is added to aviation gasoline to

retard the formation of corrosives.
improve the gasoline’s performance in the engine.
dissolve the moisture in the gasoline.

A fuel that does not vaporize readily enough can cause

vapor lock.
detonation.
hard starting.

AP GN Ground Operation and Servicing

Jon K

Quiz Summary

Information

Results

Results

Categories

1. Question

2. Question

3. Question

4. Question

5. Question

6. Question

7. Question

8. Question

9. Question

10. Question

11. Question

12. Question

13. Question

14. Question

15. Question

16. Question

17. Question

18. Question

19. Question

20. Question

21. Question

22. Question

23. Question

24. Question

25. Question

26. Question

27. Question

28. Question

29. Question

30. Question

31. Question

32. Question

33. Question

34. Question

35. Question

36. Question

37. Question

38. Question

39. Question

40. Question

41. Question

Responses