Aeronautics Knowledge Test: The 54h60-117, Dowty R391 Propeller Systems And Gtcp 165 Engine
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- 1.Which 54h60-117 propeller propeller subassembly transmits engine torque to the propeller blades?
- A.
Barrel
- B.
Control
- C.
Low pitch stop
- D.
Pitchlock regulator
- 2.Which 54h60-117 propeller subassembly carries high centrifugal loads created by the propeller blades?
- A.
Dome
- B.
Barrel
- C.
Control
- D.
Front spinner
- 3.On the 54h60-117 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
- 4.On the 54h60-117 propeller, which pitchlock component mechanically holds the stationary and rotating pitchlock ratchets 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 54h60-117 propeller, what component is installed on the blade before the blade butt is formed during manufacture?
- A.
Slip rings
- B.
Microadjusting ring
- C.
Roller thrust bearing
- D.
Beveled thrust washer
- 6.On the 54h60-117 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 54h60-117 propeller, which dome assembly component limits cam travel and prevents the propeller from exceeding feather and reverse blade angles?
- A.
Rotating pitchlock ratchet
- B.
Low pitch stop
- C.
Stationary cam
- D.
Stop ring
- 8.On the 54h60-117 propeller propeller, what functions 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 angle angles
- C.
Prevents the blades from decreasing pitch if an overspeed condition occurs
- D.
Transmits engine torque to the blades
- 9.On the 54h60-117 propeller, which component's purpose is to provide electrical circuits between the brush block assembly and the deicing elements of the blade assemblies?
- A.
Control assembly
- B.
Front spinner section
- C.
Hub mounting bulkead
- D.
Deicer contact ring holder
- 10.On the 54h60-117 propeller, during normal propeller operation, the output of which pumps is used?
- A.
Main pressure and main scavenge
- B.
Standby pressure and main savenge
- C.
Auxiliary pressure and main scavenge
- D.
Auxiliary pressure and auxiliary scavenge
- 11.On the 54h60-117 propeller, which pump(s) is/are used during propeller static operation?
- A.
Main pressure
- B.
Main scavenge
- C.
Standby pressure and main scavenge
- D.
Auxiliary pressure and auxiliary scavenge
- 12.On the 54h60-117 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
- 13.On the 54h60-117 propeller, which cam schedules a desired blade angle in the beta range?
- A.
Beta set
- B.
Beta follow-up
- C.
Beta shaft rigging
- D.
Alpha shaft rigging
- 14.On the 54h60-117 propeller, which valve connects the main, standby, and auxiliary pressure pumps' output to the increase pitch lines during negative torque conditions?
- A.
High pressure relief
- B.
Feather actuating
- C.
Feather
- D.
Pilot
- 15.On the 54h60-117 propeller, which valve assists the feather solenoid valve with hydraulic positioning of the feather and pilot valves?
- A.
High pressure relief
- B.
Feather actuating
- C.
Standby
- D.
Backup
- 16.On the 54h60-117 propeller, what switch, located in the valve housing, is opened by a cam from 81 to 85 degress propeller blade angle?
- A.
Beta indicator
- B.
Pressure cutout
- C.
NTS
- D.
PCBS
- 17.The 54h60-117 propeller governor speeder spring tension positions the pilot valve to maintain what percent rpm in the beta range?
- A.
104 to 108%
- B.
114 to 118%
- C.
99 to 103%
- D.
109 to 113%
- 18.On the 54h60-117 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
- 19.On the 54h60-117 propeller, when the backup valve is opened, the hydraulic pressure routed to th governor pilot valve is used for which operation?
- A.
Pitchlock
- B.
Standby
- C.
Reverse
- D.
Airstart
- 20.On the 54h60-117 propeller, which pressure pump is used to feather or unfeather the propeller during static propeller operation?
- A.
Main
- B.
Backup
- C.
Standby
- D.
Auxiliary
- 21.On the 54h60-117 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
- 22.On the 54h60-117 propeller, when standby pump output is not required, where is it routed?
- A.
Atmospheric sump
- B.
Pressurized sump
- C.
Dome assembly
- D.
Pilot valve
- 23.What type of force used during pitchlock of the 54h60-117 propeller prevents the blades from decreasing pitch?
- A.
Spiral bending
- B.
Thrust bending
- C.
Centrifugal twisting moment
- D.
Aerodynamic twisting moment
- 24.The purpose of the 54h60-117 propeller pitchlock assembly is to prevent?
- A.
Loss of oil pressure
- B.
Flow of hydraulic fluid to the pilot valve
- C.
An engine overspeed due to a loss of power
- D.
Engine overspeed due to a loss of hydraulic pressure
- 25.What prevents engagement of the stationary and rotating ratchets on the 54h60-117 propeller when blade angle are below 25 and 55 degrees?
- A.
Loss of hydraulic pressure
- B.
The pitchlock control cam
- C.
An overspeed in excess of 103.5%
- D.
Increase- or decrease pitch pressure
- 26.What will keep the rotating and stationary ratchets disengaged on the 54h60-117 propeller when the blade angle are between 25 and 55 degress?
- A.
Loss of hydraulic pressure
- B.
The pitchlock control cam
- C.
An overspeed in excess of 103.5%
- D.
Increase- or decrease pitch pressure
- 27.On the 54h60-117 propeller, what forces the stop levers on the low pitch stop to move outward?
- A.
Hydraulic pressure
- B.
Movable wedge
- C.
Dome piston
- D.
Servo valve
- 28.When pressure builds to between 240 and 280 psi on the 54h60-117 propeller, which valve is unseated and allows the stop levers to retract
- A.
Servo
- B.
Backup
- C.
Governor pilot
- D.
Low pressure relief
- 29.What is coordinated by the throttle in the controllable pitch range?
- A.
propeller blade pitch and engine fuel flow
- B.
Propeller blade pitch and temperature limiting
- C.
Engine fuel flow and constant speed governing
- D.
Temperature limiting and constant speed governing
- 30.Constant speed can only occur when the throttle is positioned from?
- A.
Rvs to flt idle
- B.
Rvs to gnd idle
- C.
Gnd idle to flt idle
- D.
Flt idle to take off
- 31.On the 54h60-117 propeller, what is the beta range indication display on the coordination?
- A.
34 to 90 degrees
- B.
18 to 90 degrees
- C.
0 to 34 degrees
- D.
0 to 18 degrees
- 32.On the 54h60-117 propeller, during beta range operation, what moves the pilot valve?
- A.
Cams and mechanical linkage
- B.
Flyweights and speeder spring
- C.
Hydraulic pressure
- D.
Throttle
- 33.In the beta range of the 54h60-117 propeller, which cam increases the speeder spring tension?
- A.
Beta set
- B.
Speed set
- C.
Backup valve
- D.
Beta follow-up
- 34.During beta range operation on the 54h60-117 propeller, which cam's rotation moves the mechanical linkage to center the governor pilot valve?
- A.
Beta set
- B.
Speed set
- C.
Backup valve
- D.
Beta-follow-up
- 35.During alpha range operation on the 54h60-117 propeller, which cam changes speeder spring tension so the governor pilot valve can maintain 100 percent engine speed?
- A.
Beta set
- B.
Speed set
- C.
Backup valve
- D.
Beta follow-up
- 36.During an overspeed condition in the alpha range on the 54h60-117 propeller, the flyweights move the governor pilot valve to meter hydraulic fluid, which will?
- A.
Increase blade angle
- B.
Decrease blade angle
- C.
Engage the low pitch stop
- D.
Engage the pitchlock ratchets
- 37.Once an overspeed 54h60-117 propeller condition is corrected and the pilot valve is returned to the center position, what is the result?
- A.
Hydraulic fluid flow to the dome assembly is increased
- B.
Blades are moved to the feather position
- C.
Propeller starts to underspeed
- D.
System is back on-speed
- 38.During an underspeed condition on the 54h60-117 propeller, what moves the pilot valve?
- A.
Decreased hydraulic pressure
- B.
Increased hydraulic pressure
- C.
Speeder spring
- D.
Flyweights
- 39.When feathering the 54h60-117 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
- 40.During 54h60-117 propeller 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
- 41.Which valve is a backup in case the feather valve fails during feathering operation on the 54h60-117 propeller?
- A.
Pilot
- B.
Feather solenoid
- C.
Feather actuating
- D.
Standby pump check
- 42.During the 54h60-117 propeller feathering operation, which valve acts as a backup for the feather actuating valve?
- A.
Feather
- B.
Standby check
- C.
Feather solenoid
- D.
Standby pump check
- 43.During the 54h60-117 propeller feathering operation, which valve blocks off the standby pump output and causes hydraulic pressure to increase?
- A.
Feather
- B.
Standby check
- C.
Feather solenoid
- D.
Feather actuating
- 44.During feather operation on the 54h60-117 propeller, what range in pounds per square inch (psi) of fluid pressure opens the pressure cutout switch contacts?
- A.
0 to 200
- B.
300 to 500
- C.
600 to 800
- D.
900 to 1,100
- 45.Which component on the 54h60-117 propeller propeller is the primary electrical ground for energizing the feather override holding coil?
- A.
Feather relay
- B.
Feather solenoid
- C.
Pressure cutout switch
- D.
Pressure cutout backup switch (PCBS)
- 46.When attempting to unfeather the 54h60-117 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
- 47.Which two cams on the alpha shaft control the 54h60-117 propeller unfeathering operation?
- A.
Speed set and beta follow-up
- B.
Manual feather and beta set
- C.
Speed set and pressure cutout backup switch
- D.
Manual feather and pressure cutout backup switch
- 48.On the 54h60-117 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
- 49.On the 54h60-117 propeller, after the NTS system actuator rod positions the mechanical linkage in the valve housing when a negative torque condition occurs, what component is shifted?
- A.
Pilot valve
- B.
Beta set cam
- C.
Speed set cam
- D.
Feather actuating valve
- 50.Besides maintaining the optimum blade phase angle relationship between all propellers, synchrophasing also?
- A.
Keeps the propellers rotating at the same speed
- B.
Keeps the propellers rotating at different speeds
- C.
Prevents the pilot valve from shifting to increase blade angle
- D.
Prevents the pilot valve from shifting to decrease blade angle
- 51.Which switch has a spring-loaded guard to hold it in the normal position?
- A.
Propeller governor control
- B.
Synchrophaser disarming
- C.
Prop resynchrophase
- D.
Synchrophase master
- 52.What rpm in the alpha range are the fuel governing check switches used to reset the propeller governor?
- A.
100%
- B.
102%
- C.
104%
- D.
106%
- 53.On the 54h60-91 propeller speed bias motor, what results when the control winding voltage is different from the reference-winding voltage?
- A.
Throttle anticipation potentiometer speeds up or slows down the engine
- B.
Speed bias motor rotates, and increases or decreases blade angle
- C.
Feedback potentiometer recenters the speed bias motor
- D.
Speed bias servo control locks the clutch and brake unit
- 54.The master synchrophaser board located in the synchrophaser unit contains a master synchrophaser board located in the synchrophaser unit contains a master channel and a slave channel used by propellers?
- A.
No.1 and no.2
- B.
No.2 and no.3
- C.
No.3 and no.4
- D.
No. 1 through 4
- 55.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%
- 56.In the mechanical governing mode, what causes the pilot valve to move and set the 54h60-117 propeller speed?
- A.
Throttle movement
- B.
Speeder spring or flyweights
- C.
Beta set cam and beta follow-up cam
- D.
Speed set cam and manual feather cam
- 57.Which propeller governing modes add more functionality to basic mechanical governing mode?
- A.
Synchrophasing and beta range
- B.
Normal and synchrophasing
- C.
Beta and normal range
- D.
Alpha and beta range
- 58.For the 54h60-117 propeller to operate in the normal governing mode, the propeller governor control switch must be placed in the normal position and the throttle must be?
- A.
At or above FLT IDLE and the synchrophase master switch in the ENG 2 or ENG 3 position
- B.
At or above FLT IDLE and the synchrophase master switch in the OFF position
- C.
Below FLT IDLE and the prop resynchrophase switch in RESYNC/INDEX
- D.
Below FLT IDLE and the fuel governing switch in check
- 59.When an increase in rpm occurs during engine speed stabilization, how is an overspeed condition prevented?
- A.
Decrease speeder spring tension and position the pilot valve to increase blade angle
- B.
Increase speeder spring tnesion and position the pilot valve to decrease blade angle
- C.
Decrease flyweight rotation and position the pilot valve to increase blade angle
- D.
Increase flyweight rotation and position the pilot valve to decrease blade angle
- 60.How many slave channels are contained on the master synchrophaser board in the synchrophaser unit?
- A.
One
- B.
Two
- C.
Three
- D.
Four
- 61.If the slave propeller blades are in the correct phase angle position during the synchrophasing governing mode, the resultant phase error voltage is?
- A.
+1.5
- B.
+1
- C.
0
- D.
-1
- 62.In the event the r391 dowty propeller lost hydraulic pressure, the counterweights installed at the root of each propeller blade would drive the propeller blades toward what position?
- A.
Max reverse
- B.
Ground idle
- C.
Take off
- D.
Feather
- 63.which r391 dowty propeller component routes engine oil to and form the cylinder and piston?
- A.
Beta tube
- B.
Gbe valve
- C.
PUAD
- D.
GMAD
- 64.What r391 dowty propeller assembly part provides an aerodynamic faring over the aft section of the hub?
- A.
Backplate
- B.
Rear spinner
- C.
Front spinner
- D.
Afterbody assemblies
- 65.The pneumatic air bled from the small gas turbine engine cannot be used to?
- A.
Inflate aircraft tires
- B.
Remove snow and ice from aircraft surfaces
- C.
Supply pneumatic power to aircraft pneumatic starters
- D.
Provide pneumatic power for air-conditioning systems
- 66.When used for ground operation, the sgt engine can be installed on?
- A.
Pods
- B.
An h-frame
- C.
A two-wheel trailer
- D.
A four-wheel trailer
- 67.The "c" in the engine number GTCP 165 indicates that the engine?
- A.
Provides electrical power
- B.
Provides compressed air
- C.
Is gas powered
- D.
Is a turbine
- 68.The impeller wheel and two turbine wheels in the turbine section of the GTCP 165 engine are connected by?
- A.
Couplings on a common shaft
- B.
A gear reduction gearbox
- C.
Helical splines
- D.
Tie bolts
- 69.On a gtcp 165 engine, the accessory drive section aft housing contains the?
- A.
Fuel control unit
- B.
Oil pump assembly
- C.
Vane-axial fan assembly
- D.
Compressor front shaft bearing
- 70.On a gtcp 165 engine, which signals are used by the fuel control unit to control engine operation?
- A.
Engine speed and pneumatic thermostat(load control) air pressure
- B.
Ambinet inlet pressure and turbine exhaust pressure
- C.
Engine speed and turbine inlet temperature
- D.
Pt0 and pt7
- 71.On gtcp 165 engine shutdown, what valve closes to ensure fuel-flow is terminated?
- A.
Poppet
- B.
Scheduling
- C.
Fuel flow divider
- D.
Fuel shutoff solenoid
- 72.What type of sump design is the oil system on a gtcp 165 engine?
- A.
Wet
- B.
Dry
- C.
Hot
- D.
Cold
- 73.On a gtcp 165 engine, which component shuts the engine down if the oil pressure drops below the safe minimum operating limit?
- A.
Oil/air cooler
- B.
Oil filter assembly
- C.
Oil pressure switch
- D.
Oil pressure regulator valve
- 74.On a gtcp 165 engine oil system, air that leaks past various oil seals exits through the?
- A.
Vent system
- B.
Pressure system
- C.
Scavenge system
- D.
Auxiliary
- 75.During a normal start on a gtcp 165 engine, the igniter plug continues firing until engine rotation in rpm reaches?
- A.
75 %
- B.
80 %
- C.
95 %
- D.
100 %
- 76.During normal gtcp 165 engine shutdown, what circuit trips to stop the engine?
- A.
100 % circuit
- B.
110 % circuit
- C.
Load-control circuit
- D.
Speed-switch control circuit
- 77.The modulating and shutoff valve on a gtcp 165 engine will be fully open at what percent rpm?
- A.
60
- B.
70
- C.
80
- D.
90
- 78.On a gtcp 165 engine, air for the load control system is extracted from the?
- A.
Torus
- B.
Combustor
- C.
Turbine plenum
- D.
Compressor deswirl vanes
- 79.During load control system operation on a gtcp 165 engine, the pneumatic thermostat is used to?
- A.
Allow for stall-free engine acceleration
- B.
Prevent engine exhaust over-temperature
- C.
Measure the compressor exit air temperature
- D.
Measure the compressor inlet (ambinet) air temperature
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