Volume 4. Propellers And Small Gas Turbines

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About This Quiz

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!

Volume 4. Propellers And Small Gas Turbines - Quiz

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  • 2. 

    Which 54H60-91 propeller subassembly transmits engine torque to the propeller blades?

    • Barrel

    • Control

    • Low pitch stop

    • Pitchlock requlator

    Correct Answer
    A. Barrel
  • 3. 

    On the 54H60-91 propeller, which component provides a means for balancing the propeller?

    • Deicer cnotact ring holder

    • Hub mounting bulkhead

    • Front spinner

    • Afterbody

    Correct Answer
    A. Hub mounting bulkhead
  • 4. 

    On the 54H60-91 propeller, during normal porpeller operation, the output of which pumps is used?

    • Main pressure and main scavenge

    • Standby pressure and main scavenge

    • Auxiliary pressure and main pressure

    • Auxiliary pressure and auxiliary scavenge

    Correct Answer
    A. Main pressure and main scavenge
  • 5. 

    On the 54H60-91 propeller, which pitchlock component mechanically holds the stationary and rotating pitchlock ratchets apart during reversing adn unfeatherin operations?

    • Pitchlock control cam

    • Pitchlock ratchet piston

    • Externally threaded ring

    • Externally splined spacer ring

    Correct Answer
    A. Pitchlock control cam
  • 6. 

    What component in the T56 engine coordinator provides reference signals to the electronic TD amplifier that are proportional to the desired TIT?

    • Feather shaft

    • Potentiomether

    • 65* microswitch

    • 66* microswitch

    Correct Answer
    A. Potentiomether
  • 7. 

    When attempting to unfeather the 54H60-91 propeller in flight, where must the throttle be positioned?

    • Any throttle position

    • Above FLT IDLE

    • At TAKE OFF

    • At GND IDLE

    Correct Answer
    A. Above FLT IDLE
  • 8. 

    The master synchrophaser board located int the synchrophaser unit contains a master channel and a slave channel. these channels are used by which propellers?

    • No. 1 and no. 2

    • No. 2 and no. 3

    • No. 3 and no. 4

    • All four propellers

    Correct Answer
    A. No. 2 and no. 3
  • 9. 

    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?

    • 0*

    • 18*

    • 34*

    • 90*

    Correct Answer
    A. 18*
  • 10. 

    On the 54H60-91 propeller, if the main filter becomes clogged, which valve opens to assure continued flow?

    • Check

    • Bypass

    • Low pressure relief

    • High pressure relief

    Correct Answer
    A. Bypass
  • 11. 

    Which type fo special inspection can be used to find minute cracks on a propeller blade?

    • Magnetic

    • Purple dye

    • Magna flux

    • Spectrometric

    Correct Answer
    A. Purple dye
  • 12. 

    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?

    • 45

    • 95

    • 244

    • 781

    Correct Answer
    A. 95
  • 13. 

    On the 54H60-91 propeller, which dome assembly part allow the rotating cam to turn while the stationary cam remains in a fixed postion?

    • Roller shaft

    • Track slopes

    • Ball bearings

    • Roller bearings

    Correct Answer
    A. Ball bearings
  • 14. 

    The purpose fo the 54H60-91 propeller pitchlock assembly is to prevent

    • The loss of oil pressure

    • An engine overspedd due to a loss of power

    • The flow of hydraulic fluid to the pilot valve

    • An engine ovespeed due to a loss fo hydraulic pressure

    Correct Answer
    A. An engine ovespeed due to a loss fo hydraulic pressure
  • 15. 

    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?

    • Beta set

    • Speed set

    • Backup valve

    • Beta follow-up

    Correct Answer
    A. Speed set
  • 16. 

    If the master propeller fails during synchrophaser governing, the slave propellers follow the master to

    • A 96% mechanical stop

    • About a 2% speed change

    • The mechanical governor setting

    • The preset master propeller governing setting

    Correct Answer
    A. About a 2% speed change
  • 17. 

    On the 54H60-91 propeller, which component delivers the actual propeller blade angle from the blade to the control assembly?

    • Microadjusting ring

    • Beta feedback shaft

    • Blade segment gear

    • Blade bushing

    Correct Answer
    A. Beta feedback shaft
  • 18. 

    On the 54H60-91 propeller, which component is used in place of a shim plate on the No. 1 blade?

    • Beveled thrust washer

    • Stationary ratchet

    • Beta segment gear

    • Blade barrel shim

    Correct Answer
    A. Beta segment gear
  • 19. 

    The 54H60-91 propeller governor speeder spring tension positions the pilot valve to maintain what percent rpm in the beta range?

    • 99 to 103%

    • 104 to 108%

    • 109 to 113%

    • 114 to 118%

    Correct Answer
    A. 109 to 113%
  • 20. 

    The condition lever GND STOP position is only effective on the ground because the circuits made in this position are completed throw what switches?

    • Landing gear touchdown

    • Low speed ground idle

    • Landing gear warning

    • Air start

    Correct Answer
    A. Landing gear touchdown
  • 21. 

    On the 54H60-91 propeller, the output of what pump is sufficient to supply hydraulic pressure for nomal propeller operation?

    • Auxiliary pressure

    • Standby pressure

    • Backkup pressure

    • Main pressure

    Correct Answer
    A. Main pressure
  • 22. 

    On the 54H60-91 propeller, what forces the stop levers on the low pitch stop to move outward?

    • Wedge

    • Servo valve

    • Dome piston

    • Hydraulic pressure

    Correct Answer
    A. Wedge
  • 23. 

    On the 54H60-91 propeller, during feather operation, between approximately what psi are the pressure cutout switch contacts opened?

    • 0 to 200

    • 300 to 500

    • 600 to 800

    • 900 to 1,100

    Correct Answer
    A. 600 to 800
  • 24. 

    On the 54H60-91 propeller, which valve, contained in the valve housing, controls the flow of hydraulic fluid to and from the dome assembly?

    • Standby

    • Feather

    • Backup

    • Pilot

    Correct Answer
    A. Pilot
  • 25. 

    To reduce the noise and vibration levels, synchrophasing mode of governing maintains all the propellers at

    • Identical speeds and the same blade phase angles

    • Different speeds and the same blade phase angles

    • Identical speeds and optimum blade phase angles

    • Different speeds and optimum blade phase angles

    Correct Answer
    A. Identical speeds and optimum blade phase angles
  • 26. 

    On the 54H60-91 propeller, to avoid being crushed after emoving the dome shell during dome piston seal replacement, you should keep your fingers away from the

    • Dome shell

    • Cam tracks

    • Dome piston

    • Seal area of the piston

    Correct Answer
    A. Cam tracks
  • 27. 

    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?

    • Red

    • Blue

    • Green

    • White

    Correct Answer
    A. White
  • 28. 

    When used for ground operation, the SGT engine can be installed on

    • Pods

    • An H-frame

    • A two-wheel trailer

    • A four-wheel trailer

    Correct Answer
    A. A four-wheel trailer
  • 29. 

    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?

    • Pitchlock

    • Standby

    • Reverse

    • Airstart

    Correct Answer
    A. Reverse
  • 30. 

    On the 54H60-91 propeller, the funcition  of the low pitch stop is to prevent the

    • Propeller barrel from decreasing blade angle below 23.3* +_ .5*

    • Dome piston from decresing blade angle below 23.3* +_ .5*

    • Propeller barrel from decreasing blade angle below 34* +_ .5*

    • Dome piston from dereasing blade angle below 34* +_ .5*

    Correct Answer
    A. Dome piston from decresing blade angle below 23.3* +_ .5*
  • 31. 

    On a GTCP165 engine shutdown, what valve closes to ensure fuel-flow is terminated?

    • Poppet

    • Scheduling

    • Fuel flow divider

    • Fuel shutoff solenoid

    Correct Answer
    A. Fuel shutoff solenoid
  • 32. 

    On the 54H60-91 popeller, what is the function of the differential gear train assembly?

    • Drives the main and standby pressure pumps

    • Controls operation of the pilot valve and serves as an electrical ground

    • Drives the rotation sleeve when the throttle is positioned in the beta range

    • Transmits blade angle movement to the valve housin and drives the propeller governor flyweights

    Correct Answer
    A. Transmits blade angle movement to the valve housin and drives the propeller governor flyweights
  • 33. 

    On the 54H60-91 propeller, when feathering the propeller, what acts on the mechanical linkage to open the feather actuating valve?

    • Throttle

    • Beta shaft

    • Pilot valve

    • Manual feather cam

    Correct Answer
    A. Manual feather cam
  • 34. 

    How much change in rpm does the compensating network in the synchrophaser unit allow the speed bias motor to correct?

    • 2%

    • 4%

    • 6%

    • 8%

    Correct Answer
    A. 2%
  • 35. 

    On the 54H60-91 propeller, wen 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

    • 0.002 inch

    • 0.004 inch

    • 0.020 inch

    • 0.040 inch

    Correct Answer
    A. 0.002 inch
  • 36. 

    When the ambient temperature is greater than 65*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?

    • 24 hours

    • 48 hours

    • 5 days

    • 7 days

    Correct Answer
    A. 7 days
  • 37. 

    On an GTCP165 engine, turbine discharge temperature is controlled by the

    • PMG

    • Governor

    • Pneumatic thermostat

    • Fuel flow divider valve

    Correct Answer
    A. Pneumatic thermostat
  • 38. 

    On the 54H60-91 propeller, which is a function of the the pitchlock regulator?

    • Stops the dome piston from increasing blade angle above 23.3

    • Prevents the blades from decreasing pitch if hydraulic pressure is lost

    • Prevents cam bearing rollers from bottoming out in the track slopes

    • Prevents the propeller from going into the beta range when the throttle is positioned in alpha range

    Correct Answer
    A. Prevents the blades from decreasing pitch if hydraulic pressure is lost
  • 39. 

    On the 54H60-91 propeller, during feathering operation, the feather valve is positioned to meter hydraulic fluid to the

    • Aft end of the dome piston

    • Forward end of the dome piston

    • Decreased-pitch side of the pilot valve

    • Increased-pitch side of the pilot valve

    Correct Answer
    A. Forward end of the dome piston
  • 40. 

    To calculate the required weight change when u use the 192A spectrum analyzer, you will need to plot the data on a

    • Balance sensitivity chart

    • Solution screen printout

    • Balance chart worksheet

    • Weight balance sheet

    Correct Answer
    A. Balance chart worksheet
  • 41. 

    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)?

    • 12 o'clock

    • 9 o'clock

    • 6 o'clock

    • 3 o'clock

    Correct Answer
    A. 9 o'clock
  • 42. 

    The impeller wheel and tow turbine wheels in the turbine setion of the GTCP165 engine are connected by

    • Tie bolts

    • Helical splines

    • A common shaft

    • A gear reduction gerbox

    Correct Answer
    A. A common shaft
  • 43. 

    On the 54H60-91 propeller, hydraulic fluid is directed from the directed from the pump housing to the barrel assembly through what component?

    • Valve housing

    • Low pich stop

    • Transfer bearing

    • Pitchlock regulator

    Correct Answer
    A. Transfer bearing
  • 44. 

    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?

    • Check

    • Bypass

    • Low-pressure relief

    • High-pressure relief

    Correct Answer
    A. Low-pressure relief
  • 45. 

    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?

    • 4

    • 6

    • 8

    • 10

    Correct Answer
    A. 8
  • 46. 

    On the 54H60-91 propeller, propeller balancing is not required if the propeller imbalance is at or below what level?

    • 0.2 IPS

    • 0.4 IPS

    • 0.2 degrees

    • 0.4 degrees

    Correct Answer
    A. 0.2 IPS
  • 47. 

    On the 54H60-91 propeller, what function is a task of the low pitch stop assembly?

    • Prevents the popeller from goin in to the beta range when the throttle is positioned in the alpha range

    • Limits cam travel and prevents the propeller from exceeding feather and reverse balde angles

    • Prevents the blades from decreasing pitch if an overspeed condition occurs

    • 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
  • 48. 

    When performing the blade tracking inspection on the 54H60-91 propeller, the calculated difference in blade tracks shouldnot exceed what limit?

    • 1/16 inch

    • 3/16 inch

    • 5/16 inch

    • 7/16 inch

    Correct Answer
    A. 7/16 inch
  • 49. 

    On the 54H60-91 propeller, if a nick is found on the metal protion of the blade when performing a blade inspection, which tool is used to measure the depth of the damage?

    • Internal caliper

    • Inside micrometer

    • Blade checking indicator

    • Ruler with 1/64" increments

    Correct Answer
    A. Blade checking indicator

Quiz Review Timeline (Updated): Mar 20, 2022 +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Mar 20, 2022
    Quiz Edited by
    ProProfs Editorial Team
  • Jul 19, 2009
    Quiz Created by
    Cezar
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