Ground ops Flashcards
(Refer to Figure 50.) Identify the signal to engage rotor on a rotorcraft
3
During starting of a turbine powerplant using a compressed air starter, a hung start occurred. Select the proper procedure
Shut the engine down
Characteristics of a detonation are
Rapid rise in cylinder pressure, excessive cylinder had temperature, and a decrease in engine power
if a hot start occurs during starting of a turbine powerplant, what is the likely cause?
The fuel/air mixture was exceedingly rich
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
When first starting to move an aircraft while taxiing, it is important to
Test the brakes
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
How are aviation fuels, which passes greater antiknock qualities than 100 octane, classified?
By performance numbers
When stopping a nose wheel type airplane after taxiing (or towing) the nose wheel should be left
Pointed straight ahead
If an engine fire develops during the starting procedures the first step you should take in the extinguishing the fire is
Continue cranking to start the engine & blow out the fire.
Why is the ethylene dibromide added to aviation gasoline?
To scavenge lead oxide from the cylinder combustion chambers.
The most important condition to be monitored during start after fuel flow begins in a turbine engine is the
EGT, TIT, or ITT
The color of 100LL fuel is
Blue
Jet fuel number identifiers are
Type numbers and have no relation to the fuel’s performance in the aircraft engine
When starting and ground operating an aircraft’s engine. the aircraft should be positioned to head into the wind primarily
For engine cooling putpose
When taxiing (or towing) an aircraft, an alternating red and green light from the control tower means
OK to proceed but use extreme caution
Tetraethyl lead is added to aviation gasoline to
Improve the gasoline’s performance in the engine.
Which of the following conditions has the most potential for causing engine damage when starting or attempting to start a turbine engine?
Hot start
When taxiing an airplane with a quartering tailwind, the elevators and
Upwind aileron should be held in the down position
A hung start in a jet engine is often caused by
The starter cutting off too soon.
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 cut-off, ignition switch off, and the throttle fully open, until the fuel charge has been cleared
Weathervaning tendency is greatest when taxiing
A tailwheel-type airplane in a direct crosswind
1) Jet fuel is higher viscosity than aviation gasoline and therefore holds contaminants better.
2) Viscosity has no relation to contamination of fuel.
Regarding the above statements,
Only no.1 is true
The priming of a fuel injected horizontally opposed engine is accomplished by placing the fuel control lever in the
FULL-RICH position
What must accompany fuel vaporization?
An absorption of heat
A fuel that vaporizes too readily may cause
Vapor lock
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 volume than gasoline.
When taxiing (or towing) an aircraft, a flashing red light from the control tower means
Moves clear of the runaway/taxiway immediately
When approaching the rear of an idling turbojet or turbofan engine, the hazard area extends aft of the engine approximately
100 feet
Which of the following is the most satisfactory extinguishing agent for use on a carburetor or intake fire?
Carbon dioxide
Which statement below reflects a typical requirement when towing some aircraft?
If the aircraft has a steerable nose wheel, the torque-link lock should be set to full swivel
(Refer to Figure 51.) Which marshaling signal should be given if a taxiing aircraft is in imminent danger of striking an object?
3
What affect, if any, will aviation gasoline mixed with jet fuel have on a turbine engine?
The tetraethyl lead in the gasoline forms deposits on the turbine blades
The main differences between grades 100 and 100LL
Lead content and color
When approaching the front of an idling ket engine, the hazard area extends forward of the engine approximately
25
Which statement(s) is/are true regarding tie down 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 nose wheel or tail wheel unlocked?
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