Volume 4. Propellers And Small Gas Turbines
There is a seemingly endless list of crucial components within an aircraft, and today we’ll be testing you on two of them – propellers and small gas turbines! Think you know your stuff? Find out today!
- 1.
Which 54H60-91 propeller subassembly transmits engine torque to the propeller blades?
- A.
Barrel
- B.
Control
- C.
Low pitch stop
- D.
Pitchlock requlator
Correct Answer
A. Barrel -
- 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
Correct Answer
B. Beta feedback shaft -
- 3.
On the 54H60-91 propeller, which is a function of the the pitchlock regulator?
- A.
Stops the dome piston from increasing blade angle above 23.3
- B.
Prevents the blades from decreasing pitch if hydraulic pressure is lost
- C.
Prevents 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
Correct Answer
B. Prevents the blades from decreasing pitch if hydraulic pressure is lost -
- 4.
On the 54H60-91 propeller, which pitchlock component mechanically holds the stationary and rotating pitchlock ratchets apart during reversing adn unfeatherin operations?
- A.
Pitchlock control cam
- B.
Pitchlock ratchet piston
- C.
Externally threaded ring
- D.
Externally splined spacer ring
Correct Answer
A. Pitchlock control cam -
- 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
Correct Answer
C. Beta segment gear -
- 6.
On the 54H60-91 propeller, which dome assembly part allow the rotating cam to turn while the stationary cam remains in a fixed postion?
- A.
Roller shaft
- B.
Track slopes
- C.
Ball bearings
- D.
Roller bearings
Correct Answer
C. Ball bearings -
- 7.
On the 54H60-91 propeller, what function is a task of the low pitch stop assembly?
- A.
Prevents the popeller from goin in to 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 balde angles
- C.
Prevents the blades from decreasing pitch if an overspeed condition occurs
- D.
Transmits engine torque to the blades
Correct Answer
A. Prevents the popeller from goin in to the beta range when the throttle is positioned in the alpha range -
- 8.
On the 54H60-91 propeller, which component provides a means for balancing the propeller?
- A.
Deicer cnotact ring holder
- B.
Hub mounting bulkhead
- C.
Front spinner
- D.
Afterbody
Correct Answer
B. Hub mounting bulkhead -
- 9.
On the 54H60-91 propeller, hydraulic fluid is directed from the directed from the pump housing to the barrel assembly through what component?
- A.
Valve housing
- B.
Low pich stop
- C.
Transfer bearing
- D.
Pitchlock regulator
Correct Answer
C. Transfer bearing -
- 10.
On the 54H60-91 popeller, 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 rotation sleeve when the throttle is positioned in the beta range
- D.
Transmits blade angle movement to the valve housin and drives the propeller governor flyweights
Correct Answer
D. Transmits blade angle movement to the valve housin and drives the propeller governor flyweights -
- 11.
On the 54H60-91 propeller, during normal porpeller operation, the output 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
Correct Answer
A. Main pressure and main scavenge -
- 12.
On the 54H60-91 propeller, which cam disarms the NTS system linkage when the throttle is positioned in teh beta range?
- A.
Manual feather
- B.
Beta follow up
- C.
Speed set
- D.
Beta set
Correct Answer
A. Manual feather -
- 13.
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
Correct Answer
D. Pilot -
- 14.
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%
Correct Answer
C. 109 to 113% -
- 15.
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*
- B.
18*
- C.
34*
- D.
90*
Correct Answer
B. 18* -
- 16.
Which switch, located in the control quadrant, activates the 54h-60-91 propeller governor speed bias servo assebly as the throttle is moved into the blight idle gate?
- A.
Beta indicator
- B.
Landing gear warning
- C.
Low speed ground idle
- D.
Synchrophaser disarming
Correct Answer
D. Synchrophaser disarming -
- 17.
The condition lever GND STOP position is only effective on the ground because the circuits made in this position are completed throw what switches?
- A.
Landing gear touchdown
- B.
Low speed ground idle
- C.
Landing gear warning
- D.
Air start
Correct Answer
A. Landing gear touchdown -
- 18.
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.
Potentiomether
- C.
65* microswitch
- D.
66* microswitch
Correct Answer
B. Potentiomether -
- 19.
On the 54H60-91 propeller, the output of what pump is sufficient to supply hydraulic pressure for nomal propeller operation?
- A.
Auxiliary pressure
- B.
Standby pressure
- C.
Backkup pressure
- D.
Main pressure
Correct Answer
D. Main pressure -
- 20.
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
Correct Answer
B. Bypass -
- 21.
On the 54H60-91 propeller, which valve sets and maintains a pressure differential of about 100 psi between system pressure and the increase- or decrease-pitch pressure?
- A.
Check
- B.
Bypass
- C.
Low-pressure relief
- D.
High-pressure relief
Correct Answer
C. Low-pressure relief -
- 22.
On the 54H60-91 propeller, when the backup valve is opened, the hydraulic pressure routed to the governoor pilot valve is used for which operation?
- A.
Pitchlock
- B.
Standby
- C.
Reverse
- D.
Airstart
Correct Answer
C. Reverse -
- 23.
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
Correct Answer
D. Auxiliary -
- 24.
On the 54H60-91 propeller, which type of valve opens to allow the output of the standby pump to combine with the output of the main pump?
- A.
Check
- B.
Bypass
- C.
Low pressure relief
- D.
High pressure relief
Correct Answer
A. Check -
- 25.
The purpose fo the 54H60-91 propeller pitchlock assembly is to prevent
- A.
The loss of oil pressure
- B.
An engine overspedd due to a loss of power
- C.
The flow of hydraulic fluid to the pilot valve
- D.
An engine ovespeed due to a loss fo hydraulic pressure
Correct Answer
D. An engine ovespeed due to a loss fo hydraulic pressure -
- 26.
On the 54H60-91 propeller, what prevents engagement of the stationary and rotating retchets at blade angles below 25* and above 55*?
- A.
An overspeed of 103.5%
- B.
The pitchlock control cam
- C.
A loss fo hydrulic pressure
- D.
Increase- or decrease pitch pressure
Correct Answer
B. The pitchlock control cam -
- 27.
On the 54H60-91 propeller, between the blade angles of 25* and 55*, what will keep the rotation and stationary ratchets disengaged?
- A.
An overspeed of 103.5%
- B.
The pitchlock control cam
- C.
A loss fo hydrulic pressure
- D.
Increase- or decrease pitch pressure
Correct Answer
D. Increase- or decrease pitch pressure -
- 28.
On the 54H60-91 propeller, the funcition of the low pitch stop is to prevent the
- A.
Propeller barrel from decreasing blade angle below 23.3* +_ .5*
- B.
Dome piston from decresing blade angle below 23.3* +_ .5*
- C.
Propeller barrel from decreasing blade angle below 34* +_ .5*
- D.
Dome piston from dereasing blade angle below 34* +_ .5*
Correct Answer
B. Dome piston from decresing blade angle below 23.3* +_ .5* -
- 29.
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
Correct Answer
A. Wedge -
- 30.
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
Correct Answer
A. Blade pitch and engine fuel flow -
- 31.
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 balve
- D.
Beta follow-up
Correct Answer
D. Beta follow-up -
- 32.
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
Correct Answer
B. Speed set -
- 33.
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
Correct Answer
C. Speeder spring -
- 34.
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
Correct Answer
D. Manual feather cam -
- 35.
On the 54H60-91 propeller, during 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.
Decreased-pitch side of the pilot valve
- D.
Increased-pitch side of the pilot valve
Correct Answer
B. Forward end of the dome piston -
- 36.
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
Correct Answer
A. Pilot -
- 37.
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
Correct Answer
C. Main scavenge -
- 38.
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
Correct Answer
C. 600 to 800 -
- 39.
On the 54H60-91 propeller, which component is the primary electical ground for energizing the feather override holding coil?
- A.
Feather relay
- B.
Feather solenoid
- C.
Pressure cutout switch
- D.
PCBS
Correct Answer
C. Pressure cutout switch -
- 40.
When attempting to unfeather the 54H60-91 propeller in flight, where must the throttle be positioned?
- A.
Any throttle position
- B.
Above FLT IDLE
- C.
At TAKE OFF
- D.
At GND IDLE
Correct Answer
B. Above FLT IDLE -
- 41.
Which two cams, on the alpha shaft, control the 54H60-91 propeller unfeathering operation?
- A.
Manual feather and pressure cutout backup switch
- B.
Speed set and pressure cutout backup switch
- C.
Speed set and beta follow-up
- D.
Manual feather and beta set
Correct Answer
D. Manual feather and beta set -
- 42.
On the 54H60-91 propeller, what is the minimum psi required to release the feather latches and allow the piston to move forward?
- A.
200
- B.
400
- C.
600
- D.
800
Correct Answer
A. 200 -
- 43.
On the 54H60-91 propeller, after the NTS system actuator rod positins the mechanical linkage in the valve housing when a negative torque condition occurs, what component is shifted?
- A.
Speed set cam
- B.
Feather valve
- C.
Beta set cam
- D.
Pilot valve
Correct Answer
B. Feather valve -
- 44.
The fuel governing check switches are used to reset the propeller governor t what percentage of rpm in the alpha range?
- A.
100%
- B.
102%
- C.
104%
- D.
106%
Correct Answer
D. 106% -
- 45.
Where is the pickup portion of the pulse generator located?
- A.
No. 1 blade
- B.
Pump housing
- C.
Valve housing
- D.
Deicer contact ring holder assembly
Correct Answer
B. Pump housing -
- 46.
The pulse generator inputs to the synchrophaser unit are used only
- A.
To drive the feedback potentiometer
- B.
As a backup for throttle anticipation
- C.
When a master propeller is selected
- D.
To indicate actual rpm
Correct Answer
C. When a master propeller is selected -
- 47.
On the 54H60-91 propeller speed bias motor, when the control winding boltage is different from the reference-winding voltage, what results?
- A.
Throttle anticipation potentiometer speeds up or slows down the engine
- B.
Speed bias motor rotates, and increases or decreases blade angle
- C.
Speed bias sevo control locks the clutch and brake unit
- D.
Feedback potentiomether recenters the speed bias motor
Correct Answer
B. Speed bias motor rotates, and increases or decreases blade angle -
- 48.
The master synchrophaser board located int the synchrophaser unit contains a master channel and a slave channel. these channels are used by which propellers?
- A.
No. 1 and no. 2
- B.
No. 2 and no. 3
- C.
No. 3 and no. 4
- D.
All four propellers
Correct Answer
B. No. 2 and no. 3 -
- 49.
Which board in the synchrophaser unit receives input signals that are compared together, modified, and used to control the speed bias motors?
- A.
Double slave
- B.
Power supply
- C.
Power amplifier
- D.
Master synchrophaser
Correct Answer
C. Power amplifier -
- 50.
How much change in rpm does the compensating network in the synchrophaser unit allow the speed bias motor to correct?
- A.
2%
- B.
4%
- C.
6%
- D.
8%
Correct Answer
A. 2% -
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Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.
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Current Version
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Mar 20, 2022Quiz Edited by
ProProfs Editorial Team -
Jul 19, 2009Quiz Created by
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