2A651 Edition 2 Vol.3 Ure
- 1.(401) What is the composition of JP–8 fuel?
- A.
Gasoline and kerosene.
- B.
Gasoline and diesel fuel.
- C.
Diesel fuel and kerosene.
- D.
Diesel fuel and aviation gasoline.
- 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
- 3.(401) Jet aircraft operating at moderately high altitudes increase the fuel system’s susceptibility to an icing condition, further aggravated by the
- A.
Lower viscosity of jet fuels.
- B.
Higher viscosity of jet fuels.
- C.
Lower viscosity of free water.
- D.
Higher viscosity of free water.
- 4.(402) The main fuel control allows the jet engine to safely accelerate, reducing the possibility of
- A.
Flameout.
- B.
Turbine seizure.
- C.
Compressor shift.
- D.
Overtemperature.
- 5.(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.
- 6.(402) During a visual inspection, how can you tell when a fuel filter is clogged?
- A.
A green flag pops out of the filter
- B.
Fuel pressure from the fuel pump is low.
- C.
A differential pressure indicator is actuated
- D.
There is no way to tell without disassembling the filter.
- 7.(403) On a dual-spool, axial-flow engine, what controls thrust production of the engine?
- A.
Regulating engine RPM.
- B.
Regulating compressor discharge pressure.
- C.
Controlling turbine exhaust pressure.
- D.
Controlling turbine inlet temperature.
- 8.(403) During jet engine deceleration, a hydromechanical fuel control schedules fuel flow as a function of
- A.
RPM.
- B.
Inlet temperature.
- C.
Burner pressure.
- D.
Inlet pressure.
- 9.(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.
- 10.(403) Which term describes a jet engine fuel metering device that is really two fuel controls in one component?
- A.
Unified.
- B.
Combined.
- C.
Bimechanical.
- D.
Electrosecondary.
- 11.(403) Calibration and/or adjustment screws that require setting during an engine trim procedure must be
- A.
Replaced.
- B.
Die marked.
- C.
Safety sealed and/or lockwired.
- D.
Applied a thread locking compound.
- 12.(404) When in the primary mode, what controls the operation of the F100-PW–220 engine?
- A.
MEC.
- B.
PMG.
- C.
TSFC.
- D.
DEEC.
- 13.(404) On an F100-PW–220 engine, the DEEC is cooled by
- A.
Oil
- B.
Fuel
- C.
Ram air
- D.
Hydraulic fluid
- 14.(404) On an F100-PW–220 engine, how many modes is the MFC capable of operating in?
- A.
One
- B.
Two
- C.
Three
- D.
Four
- 15.(404) Which F100-PW–220 engine fuel system component controls pressurization of the core engine fuel system?
- A.
Fuel nozzle.
- B.
P&D valve.
- C.
N2 sensor.
- D.
Tt 2.5 sensor.
- 16.(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
- 17.(404) Core engine fuel flow sequence on an F100-PW–220 engine starts at the main fuel pump and then goes through the
- A.
AFP, AFC, fuel/oil cooler, P&D, and fuel nozzles.
- B.
MFC, fuel/oil cooler, P&D, and fuel nozzles.
- C.
AFC, AFP, fuel/oil cooler, P&D, and fuel nozzles.
- D.
Fuel/oil cooler, P&D, MFC, and fuel nozzles.
- 18.(405) 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.
- 19.(405) On a T56 engine, what controls the rotary movement of the fuel control metering valve?
- A.
Temperature.
- B.
Engine speed.
- C.
Throttle position.
- D.
Compressor inlet pressure.
- 20.(405) Which T56 engine component receives 120 percent of the engine fuel requirement?
- A.
TD valve
- B.
Fuel control.
- C.
TD control.
- D.
Fuel nozzle.
- 21.(405) In addition to the visual inspection, what other type of inspection does the T–56 engine fuel nozzle require?
- A.
Nondestructive.
- B.
Spray pattern.
- C.
Pre-torque.
- D.
Ultrasonic.
- 22.(405) In what position must the TD valve switches be placed in order to make the T56 engine fuel trimming system inoperative?
- A.
OFF.
- B.
NULL.
- C.
AUTO.
- D.
LOCKED.
- 23.(405) 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.
- 24.(405) Which T56 engine component sends the fuel to the fuel manifold?
- A.
TD valve.
- B.
Main fuel pump.
- C.
TD amplifier.
- D.
Fuel control.
- 25.(405) On the T56 engine, the manifold pressure switch opens to deenergize the fuel enrichment relay when fuel pressure, in psi, in the manifold reaches
- A.
30 psi.
- B.
40 psi.
- C.
50 psi.
- D.
60 psi.
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