Volume Four
Settings
- 1.which 54H60-91 propeller subassembly transmits engine torque to the propeller blades?
- A.
Barrel
- B.
Control
- C.
Low pitch stop
- D.
Pitchlock regulator
- 2.On the 54H60-91 propeller, which component delivers the actual propeller blade angle from the blade to the control assembly?
- A.
Microadjusting ring
- B.
Beta feedback shaft
- C.
Blade segment gear
- D.
Blade bushing
- 3.On the 54H60-91 propeller, which is a function of the pitchlock regulator?
- A.
Stops the dome piston from increasing blade angle above 23.3 degrees
- B.
Prevents the blades from decreasing pitch if hydraulic pressure is lost
- C.
Prevents the cam bearing rollers from bottoming out in the track slopes
- D.
Prevents the propeller from going into the beta range when the throttle is positioned in alpha range
- 4.On the 54H60-91 propeller, which pitchlock component mechanically holds the stationary and rotating pitchlock ratchets apart during reversing and unfeathering operations?
- A.
Pitchlock control cam
- B.
Pitchlock ratchet piston
- C.
Externally threaded ring
- D.
Externally splined spacer ring
- 5.On the 54H60-91 propeller, which component is used in place of a shim plate on the No. 1 blade?
- A.
Beveled thrust washer
- B.
Stationary ratchet
- C.
Beta segment gear
- D.
Blade barrel shim
- 6.On the 54H60-91 propeller, which dome assembly part allows the rotating cam to turn while the stationary cam remains in a fixed position?
- A.
Roller shaft
- B.
Track slopes
- C.
Ball bearings
- D.
Roller bearings
- 7.On the 54H60-91 propeller, what function is a task of the low pitch stop assembly?
- A.
Prevents the propeller from going into the beta range when the throttle is positioned in the alpha range
- B.
Limits cam travel and prevents the propeller from exceeding feather and reverse blade angles
- C.
Prevents the blades from decreasing pitch if an overspeed condition occurs
- D.
Transmits engine torque to the blades
- 8.On the 54H60-91 propeller, which component provides a means for balancing the propeller?
- A.
Deicer contact ring holder
- B.
Hub mounting bulkhead
- C.
Front spinner
- D.
Afterbody
- 9.On the 54H60-91 propeller, hydraulic fluid is directed from the pump housing to the barrel assembly through what component?
- A.
Valve housing
- B.
Low pitch stop
- C.
Transfer bearing
- D.
Pitchlock regulator
- 10.On the 54H60-91 propeller, what is the function of the differential gear train assembly?
- A.
Drives the main and standby pressure pumps
- B.
Controls operation of the pilot valve and serves as an electrical ground
- C.
Drives the rotating sleeve when the throttle is positioned in the beta range
- D.
Transmits blade angle movement to the valve housing and drives the propeller governor flyweights
- 11.On the 54H60-91 propeller, during normal propeller operation, the outpu of which pumps is used?
- A.
Main pressure and main scavenge
- B.
Standby pressure and main scavenge
- C.
Auxiliary pressure and main pressure
- D.
Auxiliary pressure and auxiliary scavenge
- 12.On the 54H60-91 propeller, which pump assists the main pressure pump when large blade angle movements are required?
- A.
Main scavenge
- B.
Standby pressure
- C.
Auxiliary pressure
- D.
Auxiliary scavenge
- 13.On the 54H60-91 propeller, which cam disarms the NTS system linkage when the throttle is positioned in the beta range?
- A.
Manual feather
- B.
Beta follow-up
- C.
Speed set
- D.
Beta set
- 14.On the 54H60-91 propeller, which valve, contained in the valve housing, controls the flow of hydraulic fluid to and from the dome assembly?
- A.
Standby
- B.
Feather
- C.
Backup
- D.
Pilot
- 15.The 54H60-91 propeller governor speeder spring tension positions the pilot valve to maintain what percent rpm in the beta range?
- A.
99 to 103%
- B.
104 to 108%
- C.
109 to 113%
- D.
114 to 118%
- 16.On the 54H60-91 propeller, when the throttle is moved to the GROUND IDLE position, what degree setting does the coordinator pointer indicate on the protractor?
- A.
0 degrees
- B.
18 degrees
- C.
34 degrees
- D.
90 degrees
- 17.What switch, located in the control quadrant, activates the 54H-60-91 propeller governor speed bias servo assembly as the throttle is moved into the flight idle gate?
- A.
Beta indicator
- B.
Landing gear warning
- C.
Low speed ground idle
- D.
Synchrophaser disarming
- 18.The condition lever GND STOP position is only effective on the ground because the circuits made in this position are completed through what switches?
- A.
Landing gear touchdown
- B.
Low speed ground idle
- C.
Landing gear warning
- D.
Air start
- 19.What component in the T56 engine coordinator provides reference signals to the electronic TD amplifier that are proportional to the desired TIT?
- A.
Feather shaft
- B.
Potentiometer
- C.
65 degrees microswitch
- D.
66 degrees microswitch
- 20.On the 54H60-91 propeller, the output of what pump is sufficient to supply hydraulic pressure for normal propeller operation?
- A.
Auxiliary pressure
- B.
Standby pressure
- C.
Backup pressure
- D.
Main pressure
- 21.On the 54H60-91 propeller, if the main filter becomes clogged, which valve opens to assure continued flow?
- A.
Check
- B.
Bypass
- C.
Low pressure relief
- D.
High pressure relief
- 22.On the 54H60-91 propeller, which valve sets and maintains a pressure differential of about 100 psi between system pressure and the increase- or decrese-pitch pressure?
- A.
Check
- B.
Bypass
- C.
Low-pressure relief
- D.
High-pressure relief
- 23.On the 54H60-91 propeller, when the backup valve is opened, the hydraulic pressure routed t the governor pilot valve is used for which operation?
- A.
Pitchlock
- B.
Standby
- C.
Reverse
- D.
Airstart
- 24.On the 54H60-91 propeller, which pump is used to feather or unfeather the propeller during static propeller operation?
- A.
Main
- B.
Backup
- C.
Standby
- D.
Auxiliary
- 25.On the 54H60-91 propeller, which type of valve opens to allow the output of the standby pump to continue with the output of the main pump?
- A.
Check
- B.
Bypass
- C.
Low pressure relief
- D.
High pressure relief
- 26.The purpose of the 54H60-91 propeller pitchlock assembly is to prevent
- A.
The loss of oil pressure
- B.
An engine overspeed due to a loss of power
- C.
The flow of hydraulic fluid to the pilot valve
- D.
An engine overspeed due to a loss of hydraulic pressure
- 27.On the 54H60-91 propeller, what prevents engagement of the stationary and rotatin ratchets at blade angles below 25 degrees and above 55 degrees?
- A.
An overspeed of 103.5%
- B.
The pitchlock control cam
- C.
A loss of hydraulic pressure
- D.
Increase- or decrease pitch pressure
- 28.On the 54H60-91 propeller, between the blade angles of 25 degrees and 55 degrees, what will keep the rotating and stationary ratchets disengaged?
- A.
An overspeed of 103.5%
- B.
The pitchlock control cam
- C.
A loss of hydraulic pressure
- D.
Increase- or decrease pitch pressure
- 29.On the 54H60-91 propeller, the function of the low pitch stop is to prevent the
- A.
Propeller barrel from decreasing blade angle below 23.3 degrees +/- .5 degrees
- B.
Dome piston from decreasing blade angle below 23.3 degrees +/- .5 degrees
- C.
Propeller barrel from decreasing blade angle below 34 degrees +/- .5 degrees
- D.
Dome piston from decreasing blade angle below 34 degrees +/- .5 degrees
- 30.On the 54H60-91 propeller, what forces the stop levers on the low pitch stop to move outward?
- A.
Wedge
- B.
Servo valve
- C.
Dome piston
- D.
Hydraulic pressure
- 31.On the 54H60-91 propeller, when pressure builds to between 240 and 280 psi, which valve is unseated and allows the stop levers to retract?
- A.
Low pressure relief
- B.
Governor pilot
- C.
Backup
- D.
Servo
- 32.What is coordinated by the throttle in the controllable pitch range?
- A.
Blade pitch and engine fuel flow
- B.
Blade pitch and temperature limiting
- C.
Engine fuel flow and constant speed governing
- D.
Temperature limiting and constant speed governing
- 33.On the 54H60-91 propeller, during beta range operation, what moves the pilot valve?
- A.
Throttle
- B.
Hydraulic pressure
- C.
Cams and mechanical linkage
- D.
Flyweights and speeder spring
- 34.On the 54H60-91 propeller, during beta range operation, the rotation of which cam moves the mechanical linkage to center the governor pilot valve?
- A.
Beta set
- B.
Speed set
- C.
Backup valve
- D.
Beta follow-up
- 35.On the 54H60-91 propeller, during alpha range operation, which cam changes speeder spring tension so the governor pilot valve can maintain 100 percent rpm?
- A.
Beta set
- B.
Speed set
- C.
Backup valve
- D.
Beta follow-up
- 36.On the 54H60-91 propeller, during an underspeed condition, what moves the pilot valve?
- A.
Decreased hydraulic pressure
- B.
Increased hydraulic pressure
- C.
Speeder spring
- D.
Flyweights
- 37.On the 54H60-91 propeller, when feathering the propeller, what acts on the mechanical linkage to open the feather actuating valve?
- A.
Throttle
- B.
Beta shaft
- C.
Pilot valve
- D.
Manual feather cam
- 38.On the 54H60-91 propeller, duing feathering operation, the feather valve is positioned to meter hydraulic fluid to the
- A.
Aft end of the dome piston
- B.
Forward end of the dome piston
- C.
Decrease-pitch side of the pilot valve
- D.
Increase-pitch side of the pilot valve
- 39.On the 54H60-91 propeller, which valve is a backup in case the feather valve fails during feathering operation?
- A.
Pilot
- B.
Feather solenoid
- C.
Feather actuating
- D.
Standby pump check
- 40.As the 54H60-91 propeller feathers, the output of which pump decreases (drops off)?
- A.
Auxiliary pressure
- B.
Auxiliary scavenge
- C.
Main scavenge
- D.
Feather
- 41.On the 54H60-91 propeller, during feather operation, between approximately what psi are the pressure cutout switch contacts opened?
- A.
0 to 200
- B.
300 to 500
- C.
600 to 800
- D.
900 to 1,100
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