Aircraft Propeller Construction And Propeller Operation

 

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M-17 Propeller Final Practice test [32 Question 40 Minutes]

Module 17. Propeller

Final Test

  

 

1. The optimum angle for a fixed pitch propeller is ?
   1.   2 - 4 degrees
   2.   15 degrees
   3.   6 - 10 degrees
2. The purpose of the pitch change cams is to ?
   1.   prevent windmilling
   2.   convert linear motion to rotary motion
   3.   convert rotary motion to linear motion
3. Forces acting on a propeller are?
   1.   torque, thrust and centrifugal
   2.   centrifugal, twisting, and bending
   3.   torsion, tension and thrust
4. Auto feathering is disarmed?
   1.   in the cruise
   2.   during take off
   3.   during landing
5. Propeller vibration due to a problem with propeller installations would have a?
   1.   the same frequency as turbine vibration
   2.   higher frequency than turbine vibration
   3.   lower frequency than turbine vibration
6. When in the beta range, the propeller pitch is controlled?
   1.   indirectly from the power lever
   2.   directly from the power lever
   3.   directly from the pitch change mechanism to the PCU
7. If the TAS of an aircraft increases, the CSU will?
   1.   change the blade angle to provide constant RPM
   2.   decrease the blade angle to provide constant RPM
   3.   increase the blade angle to provide constant RPM
8. When storing wooden propellers ?
   1.   store in a horizontal position
   2.   wrap in greaseproof paper
   3.   store in a dry well ventilated and illuminated location
9. Thrust and camber faces of a propeller should be blended out to?
   1.   30 times to the depth of damage
   2.   10 times to the depth of damage
   3.   5 times the depth of damage
10. Propellers are synchronised by the?
    1.   prop lever
    2.   PCU governor
    3.   power lever
11. When preparing a propeller blade for inspection it should be cleaned with?
    1.   steel wool
    2.   mild soap and water
    3.   methyl ethyl ketone
12. The propeller is 'feathered' when the blades are at ?
    1.   20° to plane of rotation
    2.   90° to plane of rotation
    3.   0° to plane of rotation
13. Counterweights are used to?
    1.   counteract the CTM of the blades
    2.   counter the ATM of the blades
    3.   balance the blades
14. What force on a propeller blade turns the blades to a fine pitch ?
    1.   Torque
    2.   CTM
    3.   ATM
15. Electrically de-iced propeller slip rings have regular resistance checks for?
    1.   wear between brushes and slip ring
    2.   open circuit heating elements
    3.   oxidization due to altitude
16. The synchronisation governor monitors?
    1.   thrust tip speeds
    2.   propeller tip speeds
    3.   RPM
17. A tracking check compares ?
    1.   2 Opposite blades
    2.   any 2 blades
    3.   2 Adjacent blades
18. Propeller slip rings?
    1.   conduct electrical power for de-icing
    2.   minimize slip
    3.   convey oil for PCU to pitch change mechanism
19. The ground (sea) clearance of a sea plane propeller is?
    1.   18 inches
    2.   9 inches
    3.   1 inch
20. Solidity of a propeller can be increased by?
    1.   increasing blade thickness
    2.   increasing blade angle
    3.   increasing blade chord
21. A propeller synchrophasing system allows a pilot to reduce noise and vibration by ?
    1.   setting the RPM of all propellers exactly the same
    2.   adjusting the plane of rotation of all propellers
    3.   adjusting the phase angle between the propellers
22. Electronic torque measuring systems utilize?
    1.   stress gauges in the reduction gear
    2.   strain gauges in the reduction gear
    3.   pressure transducers in the reduction gear
23. When the flyweights fly outwards in a PCU, this is known as?
    1.   onspeed
    2.   low power settings
    3.   overspeed
24. A 'double' acting propeller has ?
    1.   nitrogen or air on one side of piston
    2.   oil pressure on one side of piston
    3.   oil pressure on two sides of piston
25. Low torque sensing is used to initiater?
    1.   relighting
    2.   auto feathering
    3.   fine pitch selection
26. Synchronising is carried out to?
    1.   match engine rpm
    2.   match propeller tip speed
    3.   match blade phase angle difference
27. Synchronisation controls RPM within what range?
    1.   100 RPM
    2.   150 RPM
    3.   50 RPM
28. What method would you use to inspect an aluminium propeller blade when a crack is suspected?
    1.   A bright light and magnifying glass
    2.   Magnetic particle inspection
    3.   Dye penetrant inspection
29. Ice formation on the propellers, when the aircraft is in flight, will?
    1.   increase aircraft stall speed and increase noise
    2.   decrease thrust and cause excessive vibration
    3.   decrease available engine power
30. Cropping is permitted to a maximum of?
    1.   ½ inch on one blade only
    2.   ½ inch on all blades
    3.   1 inch on all blades
31. To increase anti icing effectiveness?
    1.   increase cycle times
    2.   use liquid as well as electrical anti icing systems
    3.   increase the AC or DC current
32. Leading edges should be blended out to?
    1.   5 times the depth of damage
    2.   30 times the depth of damage
    3.   10 times the depth of damage

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M17 Propellers Sub-Module No 7(Quiz No:1)

Propeller Storage and Preservation

Quiz

 

1. Wooden propellers should be stored with their blades in a ?
   1.   Vertical position
   2.   Diagonal position
   3.   Horizontal position
2. When a three-blade constant-speed propellers is left outside for an extended period of time, position the propeller ?
   1.   One of the blades pointing down
   2.   Two of the blades pointing down
   3.   All blades in horizontal position
3. If propeller storage period exceeds two (2) years ?
   1.   Replace seals and gaskets
   2.   Replace only seals
   3.   Replace only gaskets
4. Calendar month is the period of time ?
   1.   Four weeks
   2.   Thirty days
   3.   From first day to last day of the month
5. Replace lubricant according to the applicable overhaul manual if ?
   1.   Storage period is less than two years
   2.   Storage exceeds two years
   3.   Storage exceeds one year
6. Propeller preservation and de preservation is described in which document if the propeller remains installed in a stored airplane ?
   1.   Service bulletins (SB)
   2.   CMM
   3.   AMM
7. If a wood propeller is left with its blades in a vertical position, moisture can collect in the lower blade and cause ?
   1.   Balance condition
   2.   An out of-balance condition
   3.   Tracking will not distrub
8. Propellers should be stored with their blades in a which position ?
   1.   Horizontal position
   2.   Vertical
   3.   Eliptical
9. Critical inspection areas for governors are the ?
   1.   drive gear, gear of the twin spool, and "heel" of flyweight
   2.   gear of the single spool, and "toe" of flyweight
   3.   drive gear, gear of the pilot spool, and "toes" of flyweight
10. Disassemble as necessary to replace all rubber seals and gaskets ?
    1.   If storage period exceeds 5 years
    2.   If storage period exceeds 3 years
    3.   If storage period less then 3 years

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