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100 Cards in this Set
- Front
- Back
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Which 54H60-91 propeller subassembly transmits engine torque to the propeller blades?
a. barrel b. control c. low pitch stop d. pitchlock regulator |
a. barrel
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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 |
b. Beta feedback shaft
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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 |
b. prevents the blades from decreasing pitch if hydraulic pressure is lost
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On the 54H60-91 propeller, which pitchlock component mechanically holds the stationare 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 |
a. pitchlock control cam
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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 |
c. beta segment gear
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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 |
c. ball bearings
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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 the pitch if an overspeed condition occurs d. transmits engine toque to the blades |
a. Prevents the propeller from going into the beta range when the throttle is positioned in the alpha range
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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 |
b. Hub mounting bulkhead
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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 |
c. Transfer bearing
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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 |
d. Transmits blade angle movement to the valve housing and drives the propeller governor flyweights
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On the 54H60-91 propeller, during NORMAL propeller 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 |
a. Main pressure and main scavenge
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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 |
b. Standby pressure
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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 |
a. Manual feather
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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 |
d. pilot
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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 % |
c. 109 to 113 %
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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 deg b. 18 deg c. 34 deg d. 90 deg |
b. 18 deg
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What switch, located in the control quadrant, activates the 54H60-91 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 |
d. synchrophaser disarming
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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. |
a. landing gear touchdown
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What component in the T56 engine coordinator provides reference signals to the electronic TD amplifier that are proportional to the desired ***?
a. Feather shaft b. Potentiometer c. 65 deg microswitch d. 66 deg microswitch |
b. Potentiometer
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On the 54H60-91 propeller, the output of what pump is sufficient to supply hydraulic pressure for NORMAL propeller operation
a. auxiliary pressure b. standyby pressure c. backup pressure d. main pressure |
d. main pressure
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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 |
b. bypass
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On the 54H60-91 propeller, which valve sets and maintains a pressure differential of about 100 psi between system pressure and the increase of decrease pitch pressure
a. check b. bypass c. low-pressure relief d. high-pressure relief |
c. low-pressure relief
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On the 54H60-91 propeller, when the backup valve is opened , the hydraulic pressure routed to the governor pilot valve is used for which operation
a. pitchlock b. standby c. reverse d. airstart |
c. reverse
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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 |
d. Auxiliary
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On the 54H60-91 propeller, which type of valve opens to allow the output of the standby pump to combine with the out put of the main pump?
a. check b. bypass c. low pressure relief d. high pressure relief |
a. check
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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 hydaulic pressure |
d. an engine overspeed due to a loss of hydaulic pressure
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On the 54H60-91 propeller, what prevents engagement of the stationary and rotating ratchets at blade angles below 25 deg and 55 degree?
a. an overspeed of 103.5 % b. The pitchlock control cam c. a loss of hydraulic pressure d. increase or decrease pitch pressure |
b. The pitchlock control cam
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On the 54H60-91 propeller, between the blade angles of 25 deg and 55 deg, what will keep the rotating and stationary ratchets disengaged?
a. an over speed of 1-3.5 deg b. the pitchlock control cam c. a loss of hydraulic pressure d. increase- or decrease pitch pressure |
d. increase- or decrease pitch pressure
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On the 54H60-91 propeller, the function of the low pitch stop is to prevent the
a. propeller barrel from decreasing blade angel below 23.3 +/- 5 deg b. dome piston from decreasing blade angle below 23.3 +/-5 deg c. propeller barrel from decreasing blade angle below 34 +/- 5 deg d. dome piston from decreasing blade angle below 34 +/- 5 deg |
b. dome piston from decreasing blade angle below 23.3 +/-5 deg
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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 hydrualic pressure |
a. wedge
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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 |
d. servo
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What is coordinated by the throttle in the controllible 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 |
a. blade pitch and engine fuel flow
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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 |
c. cams and mechanical linkage
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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 |
d. beta follow-up
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On the 54H60-91 propeller, during alpha range operation, which cam changes speeder spring tension so the governor pilot valve can maintain 100 % rpm?
a. beta set b. speed set c. backup valve d. beta follow-up |
b. speed set
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On the 54H60-91 propeller, during an underspeed condtition, what moves the pilot valve?
a. Decreased hydraulic pressure b. increased hydraulic pressure c. speeder spring d. flyweights |
c. speeder spring
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On the 54H60-91 propeller, when feathering the propeller, what acts on the mechanical linkage to open the feather actuating valvle?
a. throttle b. beta shaft c pilot valve d. manual feather cam |
d. manual feather cam
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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. decrease-pitch side of the pilot valve d. increase-pitch side of the pilot valve |
b. forward end of the dome piston
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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 |
a. pilot
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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 |
c. main scavenge
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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 |
c. 600 to 800
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On the 54H60-91 propeller, which component is the PRIMARY electrical ground for energizing the feather override holding coil?
a. Feather relay b. Feather solenoid c. Pressure cutout switch d. PCBS |
c. Pressure cutout switch
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When attempting to unfeather the 54H-60-91 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 |
b. above FLT IDLE
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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 |
d. Manual feather and beta set
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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 |
a. 200
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On the 54H60-91 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. Speed set cam b. Feather valve c. Beta set cam d. Pilot valve |
b. feather valve
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Besides maintaining the optimum blade phase angle relationship between all propellers, what else does synchrophasing do?
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 |
a. Keeps the propellers rotating at the same speed
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The fuel governing check switches are used to reset the propeller governor to what percentage of rpm in the alpha range?
a. 100% b. 102% c. 104% d. 106% |
d. 106%
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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 |
b. pump housing
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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 |
c. when a master propeller is selected
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On the 54H60-91 propeller speed bias motor, when the control winding voltage 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 servo control locks the clutch and brake unit d. Feedback potentiometer recenters the speed bias motor |
b. Speed bias motor rotates, and increases or decreases blade angle
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The master synchrophaser board located in 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 |
b. No. 2 and No. 3
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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 |
c. power amplifier
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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% |
a. 2%
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On the 54H60-91 propeller, in the mechanical governing mode, what causes the pilot valve to move and set 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 |
b. speeder spring or flyweights
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Mechanical governing provides the foundation for what other propeller governing modes?
a. synchrophasing and beta range b. normal and synchrophasing c. normal and beta range d. alpha and beta range |
b. normal and synchrophasing
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Which is a function of NORMAL governing?
a. blade phase angles b. propeller reindexing c. throttle anticipation d. identical propeller speeds |
c. throttle anticipation
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For the 54H60-91 propeller to operate in the NORMAL governing mode, the propeller governor control switch must be placed in the NORMAL position and what other conditions must be met?
a. Throttle at or above FLT IDLE , and synchrophase master in ENG 2 or ENG 3 postition b. Throttle at or above FLT IDLE, and sychrophase master switch in OFF c. Throttle below FLT IDLE and prop resynchrophase switch in RESYNC/INDEX d. Throttle below FLT IDLE and fuel governing switch in CHECK |
b. Throttle at or above FLT IDLE, and sychrophase master switch in OFF
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During NORMAL governing operation, what stabilizes the propeller governor during rapid throttle movements?
a. tachometer generator b. feedback potentiometer c. speed stabilization circuit d. throttle anticipation circuit |
d. throttle anticipation circuit
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To reduce the noise and vibration levels, sychrophasing mode of governing maintains all the propellers at
a. identical speeds and the same blade phase angles b. different speeds and the same blade phase angles c. identical speeds and optimum blade phase angles d. different speeds and optimum blade phase angles |
c. identical speeds and optimum blade phase angles
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How many slave channels are contained on the master synchrophaser board in the synchrophaser unit?
a. One b. Two c. Three d. Four |
a. 1
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If the master propeller fails during synchrophaser governing, the slave propellers follow the master to
a. a 96% mechanical stop b. about a 2% speed change c. the mechanical governor setting d. the preset master propeller governing setting |
b. about a 2% speed change
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Which type of special inspection can be used to find minute cracks on a propeller blade?
a. Magnetic b. Purple dye c. Magna flux d. Spectrometric |
b. Purple dye
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When performing a loose blade inspection on the 54H60-91 propeller, fore-and-aft play should NOT exceed what limit?
a. 1/4 inch b. 1/2 inch c. 3/4 inch d. 1 inch |
c. 3/4 inch
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When performing the blade tracking inspection on the 54H60-91 propeller, the calculated difference in blade tracks should NOT exceed what limit?
a. 1/16 inch b. 3/16 inch c. 5/16 inch d. 7/16 inch |
d. 7/16 inch
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When you perform a static blade transition check and abnormal noises are detected, the 54H60-91 propeller must be returned to depot. What AFTO form must be documented and accompany the propeller back to depot?
a. 45 b. 95 c. 244 d. 781 |
b. 95
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On the 54H60-91 propeller, if a nick is found on the metal portion of the blade when performing a blade inspection, which tool is used to measure the depth of the damage?
a. Internal caliper b. Inside micrometer c. Blade checking indicator d. Ruler with 1/64" increments |
c. blade checking indicator
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The term "No. 320 grit" refers to which feature of sandpaper?
a. Type b. Strength c. Coarseness d. Flexibility |
c. Courseness
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On the 54H60-91 propeller, when performing blade repair if blade damage was due to propeller blade impact, you must remove all traces of the damage, and then, using emery cloth, remove an additional
a. 0.002 inch b. 0.004 inch c. 0.020 inch d. 0.040 inch |
a. 0.002 inch
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When the ambient temperature is greater than 65 degrees F and a patch is bonded to the blade fairing, what is the RECOMMENDED drying time before running the repaired propeller on the aircraft engine?
a. 24 hours b. 48 hours c. 5 days d. 7 days |
d. 7 days
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On the 54H60-91 propeller, when repairing a propeller blade heater, what is the MAXIMUM number of wires that can be spliced in any one heater?
a. 4 b. 6 c. 8 d. 10 |
c. 8
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On the 54H60-91 propeller, to avoid being crushed after removing the dome shell during dome piston seal replacement, you should keep your fingers away from the
a. dome shell b. cam tracks c. dome piston d. seal area of the piston |
b. cam tracks
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On the 54H60-91 propeller, after the new packings are in place during dome piston seal replacement, you need to turn them so what color faces outward?
a. Red b. Blue c. Green d. White |
d. White
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During 54H60-91 propeller dynamic balancing, the propeller balance analyzer receive its two inputs from
a. the forward and rear engine lord mounts b. the hub mounting bulkhead and quadrant c. a velocimeter and the magnetic pulse generator d. an accelerometer and a NTS switch |
c. a velocimeter and the magnetic pulse generator
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To calculate the required weight change when you use the 192A spectrum analyzer, you will need to plot the data on a
a. balance sensitivity chart b. solution screen printout c. balance chart worksheet d. weight balance sheet |
c. balance chart worksheet
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When balancing a 54H60-91 propeller, the velocimeter is secured to the forward side of the RGB at what position (as viewed from the rear)?
a. 12 o'clock b. 9 o'clock c. 6 o'clock d. 3 o'clock |
b. 9 o'clock
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On the 54H60-91 propeller, propeller balancing is NOT required if the propeller imbalance is at or below what level?
a. 0.2 IPS b. 0.4 IPS c. 0.2 degrees d. 0.4 degrees |
a. 0.2 IPS
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What R391 Dowty propeller component translates piston and shaft movement to vary propeller blade angle?
a. Hub b. Beta tube c. Operating pin d. Adjustment washer |
c. Operating pin
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Which R391 Dowty propeller component routes engine oil to and from the cylinder and piston?
a. Beta tube b. GBE valve c. PUAD d. GMAD |
a. Beta tube
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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 |
a. Backplate
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Which component controls the R391 Dowty propeller blade angle by directing engine oil flow through the beta tube to the cylinder and piston?
a. PCU b. GBE valve c. PUAD d. GMAD |
a. PCU
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For the R391 Dowty propeller, what component(s) relay propeller blade angle to the FADEC units?
a. PCU b. PUAD c. GBE valve solenoid d. RVDTS |
d. RVDTS
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For the R391 Dowty propeller, the feather valve is located inside the
a. PCU b. GBE valve c. PUAD d. GMAD |
a. PCU
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For the R391 Dowty propeller, what component provides blade angle feedback to the FADEC by two RVDT?
a. PCU b. GBE valve c. PUAD d. GMAD |
a. PCU
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For the R391 Dowty propeller, during flight operation, what directs the PCU to meter fine and coarse pitch oil to maintain 102-.7 rpm?
a. RVDTS b. FADEC c. GBE valve solinoid d. PUAD |
b. FADEC
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On the R391 Dowty propeller, what does the DITU use to monitor itself for malfunctions?
a. BIT b. ECBU c. FADEC d. RVDTS |
a. BIT
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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 |
a. inflate aircraft tires
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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 |
d. a four-wheel trailer
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On an GTCP165 engine, air is compressed by the single-stage centrifugal compressor assembly, and then discharged into
a. the diffuser case b. the turbine plenum c. the load control vavle d. a vaned deswirl assembly |
d. a vaned deswirl assembly
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The inpeller wheel and two turbine wheels in the turbine section of the GTCP165 engine are connected by
a. tie bolts b. helical splines c. a common shaft d. a gear reduction gearbox |
c. a common shaft
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On an GTCP165 engine, turbine discharge temperature is controlled by the
a. PMG b. governor c. pneumatic thermostat d. fuel flow divider valve |
c. pneumatic thermostat
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On an GTCP165 engine, the accessory drive section forward housing provides mounts for the components, which include fuel control unit, oil pump assembly, oil filter element, vane-axial fan assembly, and
a. ignition exciter b. fuel/oil cooler c. air/oil cooler d. PMG |
c. air/oil cooler
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On a GTCP165 engine, which signals are used by the fuel control unit to control engine operation?
a. Pt0 and Pt7 b. Engine speed and turbine inlet temperature c. Ambient inlet pressure and turbine exhaust pressure d. Engine speed and pneumatic thermostat (load control) air pressure |
d. Engine speed and pneumatic thermostat (load control) air pressure
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On a GTCP165 engine shutdown, what valve closes to ensure fuel-flow is terminated?
a. Poppet b. Scheduling c. Fuel flow divider d. Fuel shutoff solinoid |
d. Fuel shutoff solinoid
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What type of sump design is the oil system on a GTCP165 engine?
a. Wet b. Dry c. Hot d. Cold |
a. Wet
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On a GTCP165 engine, which component shuts the engine down if the oil pressure drops below the safe MINIMUM operating limit?
a. Oil/ail cooler b. Oil filter assembly c. Oil pressure switch d. Oil pressure regulator valve |
c. Oil pressure switch
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On an GTCP165 engine oil system, air that leaks past various oil seals exits through the
a. vent system b. pressure system c. scavenge system d. auxiliary system |
a. vent system
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On a GTCP165 engine, the speed switch control does NOT control the engine during
a. startup b. acceleration c. loaded operation d. no-load operation |
c. loaded operation
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During normal GTCP165 engine shutdown, what circuit trips to stop the engine?
a. 100-percent circuit b. 110-percent circuit c. Load-control circuit d. Speed-switch control circuit |
b. 110-percent circuit
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The modulating and shutoff valve on a GTCP165 engine will be fully open at what percent rpm?
a. 60 b. 70 c. 80 d. 90 |
d. 90
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