2A651H Vol. 2
.
- 1.
"An unbalanced force on a body produces or tends to produce acceleration in the direction of the force and that the acceleration, if any, is directly proportional to the force and inversely proportional to the mass of the body." This statement is?
- A.
Bernoulli's Principle
- B.
Newton's First Law of Motion
- C.
Newton's Second Law of Motion
- D.
Newton's Third Law of Motion
Correct Answer
C. Newton's Second Law of Motion -
- 2.
Newton's Third Law of Motion explains why an operating jet engine produces
- A.
Forward thrust
- B.
Forward acceleration
- C.
Increased acceleration
- D.
Decreased acceleration
Correct Answer
A. Forward thrust -
- 3.
Which law may you sum up with the words action and reaction?
- A.
Bernoulli's Principle
- B.
Newton's First Law of Motion
- C.
Newton's Second Law of Motion
- D.
Newton's Third Law of Motion
Correct Answer
D. Newton's Third Law of Motion -
- 4.
The temperature of compressed air in a jet engine must be raised to
- A.
Increase energy
- B.
Decrease energy
- C.
Increase volume
- D.
Decrease volume
Correct Answer
A. Increase energy -
- 5.
Which section of a jet engine keeps the compressor rotating?
- A.
Turbine
- B.
Exhaust
- C.
Diffuser
- D.
Combustion
Correct Answer
A. Turbine -
- 6.
Through which section of a jet engine is energy expended into the atmosphere, resulting in thrust?
- A.
Turbine
- B.
Exhaust
- C.
Diffuser
- D.
Combustion
Correct Answer
B. Exhaust -
- 7.
Which type of horsepower is the power developed within the combustion chambers without reference to friction losses within the engine?
- A.
Brake
- B.
Indicated
- C.
Frictional
- D.
Equivalent shaft
Correct Answer
B. Indicated -
- 8.
Which instrument is used to measure atmospheric pressure?
- A.
Barometer
- B.
Thermometer
- C.
Psychrometer
- D.
Potentiometer
Correct Answer
A. Barometer -
- 9.
The standard atmospheric pressure in pounds per square inch (psi) is equal to
- A.
13.5 psi
- B.
14.7 psi
- C.
29.92 psi
- D.
40.55 psi
Correct Answer
B. 14.7 psi -
- 10.
The actual amount of the water vapor in a mixture of air and water is the definition of
- A.
Pressure altitude
- B.
Relative humidity
- C.
Absolute humidity
- D.
Atmospheric pressure
Correct Answer
C. Absolute humidity -
- 11.
The ratio of the amount of water vapor actually present in the atmosphere to the amount that would be present if the air were saturated at the prevailing temperature and pressure is the definition of
- A.
Pressure altitude
- B.
Relative humidity
- C.
Absolute humidity
- D.
Atmospheric pressure
Correct Answer
B. Relative humidity -
- 12.
The major sections of a turboprop engine are the power unit, torquemeter assembly, and
- A.
Turbine assembly
- B.
Compressor assembly
- C.
Combustion assembly
- D.
Reduction Gearbox (RGB) assembly
Correct Answer
D. Reduction Gearbox (RGB) assembly -
- 13.
What is the overall reduction ratio of the reduction gearbox's (RGB) main reduction gear train?
- A.
3.125 to 1
- B.
4.333 to 1
- C.
13.54 to 1
- D.
13,820 to 1
Correct Answer
C. 13.54 to 1 -
- 14.
The four sections of the T56 engine power unit are the compressor, combustion, turbine, and
- A.
Torquemeter
- B.
Safety coupling
- C.
Reduction gearbox (RGB)
- D.
Accessory drive housing assembly
Correct Answer
D. Accessory drive housing assembly -
- 15.
Which compressor section assembly disperses compressor discharge air and directs it to the combustion chambers (liners)?
- A.
Diffuser
- B.
Compressor rotor
- C.
Compressor housing
- D.
Compressor air inlet housing
Correct Answer
A. Diffuser -
- 16.
During flight range operation, what maintains the T56 engine at a constant engine speed of 13,820 revolutions per minute (RPM)?
- A.
Fuel control
- B.
Electrical system
- C.
Hydraulic control system
- D.
Propeller governing system
Correct Answer
D. Propeller governing system -
- 17.
Which two gears make up the first stage of reduction in the reduction gearbox (RGB)?
- A.
Sun and Planetary
- B.
Ring and ring coupling
- C.
Accessory drive and starter
- D.
Pinion input and main drive
Correct Answer
D. Pinion input and main drive -
- 18.
What is the total gear reduction ratio of the reduction gearbox (RGB)?
- A.
3.125:1
- B.
4.333:1
- C.
12.85:1
- D.
13.54:1
Correct Answer
D. 13.54:1 -
- 19.
What is not a propeller brake position?
- A.
Locked
- B.
Applied
- C.
Engaged
- D.
Released
Correct Answer
C. Engaged -
- 20.
When the engine is running above 23% revolutions per minute (RPM), the propeller brake is held in the position by the
- A.
Release spring
- B.
Starter gear and helical splines
- C.
Outer member and accessory drive gear
- D.
Reduction gearbox (RGB) system oil pressure
Correct Answer
D. Reduction gearbox (RGB) system oil pressure -
- 21.
Which position is the propeller brake in when the aircraft is on the ground and the engine is stopped?
- A.
Locked
- B.
Applied
- C.
Engaged
- D.
Released
Correct Answer
B. Applied -
- 22.
When the engine is operating at a throttle setting of Flight Idle or above, what preset limit of inch-pounds of torque must be exceeded in order for the negative torque signal (NTS) system to actuate the actuator rod?
- A.
-1,020 + 400
- B.
-1,140 + 500
- C.
-1,260 + 600
- D.
-1,380 + 700
Correct Answer
C. -1,260 + 600 -
- 23.
When the engine is operating below Flight Idle, the negative torque signal (NTS) system is
- A.
Mechanically locked in
- B.
Electronically locked in
- C.
Mechanically locked out
- D.
Electronically locked out
Correct Answer
C. Mechanically locked out -
- 24.
Torque is transferred from the power unit to the safety coupling on the reduction gearbox (RGB) by the
- A.
Torque Shaft
- B.
Reference Shaft
- C.
Torquemeter Housing
- D.
Compressor Extension Shaft
Correct Answer
A. Torque Shaft -
- 25.
The amount of twisting deflection is determined by the
- A.
Torque Shaft
- B.
Reference Shaft
- C.
Safety Coupling
- D.
Pinion Input Gear
Correct Answer
B. Reference Shaft -
- 26.
The torquemeter exciter wheels are in phase when
- A.
The shaft power output is transmitted from the power unit
- B.
Negative or positive torque is transmitted to the torque indicator
- C.
The rectangular teeth on the exciter wheels are aligned at zero torque
- D.
There is a change in the torque transmitted to the torque shaft exciter wheel
Correct Answer
C. The rectangular teeth on the exciter wheels are aligned at zero torque -
- 27.
For the safety coupling to disconnect the power unit from the reduction gearbox (RGB), torque must reach between
- A.
1,200 and 4,200 inch-pounds
- B.
4,200 and 7,200 inch-pounds
- C.
-1,200 and -4,200 inch-pounds
- D.
-4,200 and -7,200 inch-pounds
Correct Answer
D. -4,200 and -7,200 inch-pounds -
- 28.
Which shaft delivers the speed of the power unit to the accessory housing?
- A.
Torque
- B.
Reference
- C.
Pinion input
- D.
Compressor extension
Correct Answer
D. Compressor extension -
- 29.
After air is drawn into the guide vanes of a centrifugal compressor, it is subjected to
- A.
Radial and Tangential forces
- B.
Rotational and Tangential forces
- C.
Rotational and Centrifugal forces
- D.
Tangential and Centrifugal forces
Correct Answer
C. Rotational and Centrifugal forces -
- 30.
During operations, of the dual-spool compressor, the revolutions per minute (RPM) of the N2 (aft) compressor rotor is determined by the
- A.
Starter
- B.
Fuel Control
- C.
Low-Pressure Turbine
- D.
Changes in altitude and air temperature
Correct Answer
B. Fuel Control -
- 31.
The cheapest type of compressor to manufacture is the
- A.
Axial-flow, because of its size
- B.
Centrifugal, because of its size.
- C.
Axial-flow, because of its simplicity
- D.
Centrifugal, because of its simplicity
Correct Answer
D. Centrifugal, because of its simplicity -
- 32.
The stationary (stator) vane blades on the T56 compressor are used to
- A.
Increase velocity
- B.
Increase pressure
- C.
Decrease pressure
- D.
Prolong compressor life
Correct Answer
B. Increase pressure -
- 33.
The stoichiometric ratio or the perfect mixture used for the combustion chamber burning process is an air-to-fuel ratio of
- A.
10:1
- B.
10:5
- C.
15:1
- D.
15:5
Correct Answer
C. 15:1 -
- 34.
Combustion section design has helped prevent igniter plug fouling by
- A.
Gold plating on the plug
- B.
Ceramic coating on the plug
- C.
Directing air around the plug electrodes
- D.
Distributing heat evenly on the plug electrodes
Correct Answer
C. Directing air around the plug electrodes -
- 35.
The entire weight of the T56 turbine section is supported by the
- A.
Diffuser inner casing
- B.
Diffuser outer casing
- C.
Combustion section one-piece outer case
- D.
Combustion section one-piece inner casing
Correct Answer
C. Combustion section one-piece outer case -
- 36.
In the T56 engine, turbine rotor torque is transferred to the compressor rotor torque by the
- A.
Turbine coupling shaft
- B.
Torquemeter outer shaft
- C.
Compressor extension shaft
- D.
Turbine to compressor tie bolt
Correct Answer
A. Turbine coupling shaft -
- 37.
In a gas turbine engine, which type of turbine is normally used?
- A.
Reaction
- B.
Pulsation
- C.
Impulse-reaction
- D.
Pulsation-reaction
Correct Answer
C. Impulse-reaction -
- 38.
The fir tree method of turbine bucket attachment is
- A.
Turbine buckets fitted solidly into the rim of the rotor disk
- B.
Rivets placed in holes through the base of the turbine bucket
- C.
A close-fitting shroud ring around the outer perimeter of the disk
- D.
A series of grooves or notches broached in the rim of the turbine rotor disk
Correct Answer
D. A series of grooves or notches broached in the rim of the turbine rotor disk -
- 39.
A turbine stage consists of a row of
- A.
Rotating vanes followed by a row of rotor blades
- B.
Rotating buckets followed by a row of rotor blades
- C.
Stationary vanes followed by a row of rotor blades
- D.
Stationary buckets followed by a row of rotor blades
Correct Answer
C. Stationary vanes followed by a row of rotor blades -
- 40.
The purpose of the guide vane support is to direct airflow
- A.
Out of the turbine section
- B.
Into the combustion section
- C.
Onto the turbine rotor blades
- D.
Toward the compressor stator blades
Correct Answer
C. Onto the turbine rotor blades -
- 41.
What are used to retain the turbine buckets in the first-stage wheel of the T56-A-15 engine?
- A.
Cotter pins
- B.
Curvic splines
- C.
Cover plate seals
- D.
Anti-rotation pins
Correct Answer
C. Cover plate seals -
- 42.
Which switch energizes the starter control valve to the OPEN position?
- A.
Ground start
- B.
Speed-sensitive
- C.
Fuel enrichment
- D.
Secondary fuel pump pressure
Correct Answer
A. Ground start -
- 43.
Which component functions as an on-off control for the air supply that is sent to the starter?
- A.
Air turbine
- B.
Ground start switch
- C.
Starter control valve
- D.
Secondary fuel pump pressure switch
Correct Answer
C. Starter control valve -
- 44.
The percent of revolutions per minute (RPM) the speed-sensitive control lets electrical current flow to the fuel and ignition system is
- A.
16% rpm
- B.
30% rpm
- C.
65% rpm
- D.
94% rpm
Correct Answer
A. 16% rpm -
- 45.
At what percent of engine revolutions per minute (RPM) is the ignition system turned off?
- A.
16% rpm
- B.
30% rpm
- C.
65% rpm
- D.
94% rpm
Correct Answer
C. 65% rpm -
- 46.
Which tester is used to accomplish the checkout procedures for the T56 engine ignition system?
- A.
Fuel nozzle
- B.
Thermocouple
- C.
Temperature datum
- D.
Electrical components
Correct Answer
D. Electrical components -
- 47.
Which type of oil pump is used on the T56 engine?
- A.
Gear
- B.
Float
- C.
Gerotor
- D.
Centrifugal
Correct Answer
A. Gear -
- 48.
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 -
- 49.
Bleed air flowing through which component increases airflow through the cooler?
- A.
Oil cooler flap
- B.
Oil cooler ejector
- C.
Augmentation valve
- D.
Augmentation manifold
Correct Answer
B. Oil cooler ejector -
- 50.
Which type of valve is normally incorporated in an oil filter assembly?
- A.
Check
- B.
Relief
- C.
Bypass
- D.
Pressurizing
Correct Answer
C. Bypass -
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Jul 06, 2016Quiz Edited by
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Jun 20, 2016Quiz Created by
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