AME M-17 QUESTIONS

 

  PROPELLERS M-17

01. The propeller governor controls the
A — Oil to and from the pitch changing mechanism.
B — Spring tension on the boost pump speeder spring.
C — Linkage and counterweights from moving in an out.

02. The primary purpose of a propeller is to

A — create lift on the fixed airfoils of an aircraft
 B — change engine horsepower to thrust
 C — provide static and dynamic stability of an aircraft in flight

03. The primary purpose of a feathering propeller is to

  A — Prevent further engine damage when an engine fails in flight.
  B — Prevent propeller damage when an engine fails in flight
 C — Eliminate the drag created by a wind milling propeller when an engine fails in flight.

04. The primary purpose of the front and rear cones for propellers that are installed on splined shafts is to

 A — Position the propeller hub on the splined shaft.
 B — Prevent metal-to-metal contact between the propeller and the splined shaft.
 C — Reduce stresses between the splines of the propeller and the splines of the shaft.

05. Propeller aerodynamic (thrust) imbalance can be largely eliminated by

A — Correct blade contouring and angle setting.
B — Static balancing.
C — Keeping the propeller blades within the same plane of rotation.

06. What is the purpose of an arbour used in balancing a propeller?
 
A — To support the propeller on the balance knives.
 B — To level the balance stand.
 C — To mark the propeller blades when weight are to be attached.

07. Propeller blade tracking is the process of determining

A — The plane of rotation of the propeller with respect to the aircraft longitudinal axis¬
 B — That the blade angles are within the specified tolerance of each other.
 C — The position of the tips of the propeller blades relative to each other.

08. What operational force causes the greatest stress on a propeller?

A — Aerodynamic twisting force.
B — Centrifugal force.
C — Thrust bending force.




09. What unit in the propeller anti- icing controls the out put of the pump.
 
A — Pressure relief valve
 B — Rheostat
 C — Cycling timer

10. Which of the following defects is cause for rejection of wood propellers?
 
A — Solder missing from screw heads securing metal tipping.
 B — An oversize hub or bolt hole, or elongated bolt holes.
 C — No protective coating on propeller

11. If a flanged propeller shaft has dowel pins
 
A — Install the propeller so that the blades are positioned for hand propping
B — The propeller can be installed in only one position.
C — Check carefully for front cone bottoming against the pins
12. Ice formation on propellers, when an aircraft is in flight, will
 
A — Decrease thrust and cause excessive vibration.
B — Increase aircraft stall speed and increase noise.
C — Decrease available engine power.

13. Apparent engine roughness is often a result of propeller unbalance. The effect of an unbalanced propeller will usually be

A — Approximately the same at all speeds.
B — greater at low RPM.
C — greater at high RPM.

14. On most reciprocating multiengine Aircraft, automatic propeller synchronization is accomplished through the actuation of the
 
A — Throttle lever
 B — Propeller governors
 C — Propeller control levers

15. How can a steel propeller hub be tested for cracks?
 
A — By anodizing
  B — By magnetic particle inspection
C — By etching

16. What is the function of the automatic propeller synchronizing system on multiengine aircraft?
A — To control the tip speed of all propellers
B — To control engine RPM and reduce vibration
C — To control the power output of all engines.



17. Geometric pitch is the distance a
(i) Propeller should advance in one revolution
(ii) Effective pitch is the distance it actually advances

A — (i) is right
B — (i) and (ii) are right
C — (ii) is wrong

18. The fixed pitch propeller is used on airplanes of
 
A — Low power
B — High power
C — Low power, speed, altitude.

19. Which of the following functions requires the use of a propeller blade station?

A — Measuring blade angle
B — Indexing blades
C — Propeller balancing

20. What actuates the pilot valve in the governor of a constant speed propeller?
 
A — Engine oil pressure¬
B — Governor flyweights
 C — Governor pump oil pressure


21. During the on-speed condition of a propeller, the
 
A — Centrifugal force acting on the governor flyweights is greater than the tension of the
  speeder spring.
B — Tension on the speeder spring is less than the centrifugal force acting on the
  governor flyweights.
  C — Centrifugal force of the governor flyweights is equal to the speeder spring force.

22. The pitch- changing mechanism of the hydromatic propeller is lubricated by

A — The pitch-changing oil
B — using an approved -type grease in a grease gun at intervals prescribed by the
  propeller manufacturer.
C — Thoroughly greasing, necessary only during propeller overhaul.

23. Propeller blade stations are measured from the

A — Index mark on the blade shank
B — Hub centerline
C — Blade base

24. The blade angle of a fixed-pitch propeller
 
A — is greatest at the tip
B — is smallest at the tip
C — increase in proportion to the distance each section is from the hub.




25. When the centrifugal force acting on the propeller governor flyweights overcomes tension on the speeder spring, a propeller is in what speed condition?

  A — On-speed
  B — Under –speed
  C — Over-speed

26. Propeller blade station numbers increase from

 A — Hub to tip.
 B — Tip to hub.
 C — Leading edge to trailing edge

27. Inspection of propeller blades by dye-penetrant inspection is accomplished to detect

A — Cracks or other defects
B — Corrosion at the blade tip.
C — Torsional stress

28. When engine power is increased, the constant-speed propeller tries to function so that it will

A — Maintain the RPM, decrease the blade angle, and maintain low angle of attack.
B — Increase the RPM, decrease the blade angle, and maintain low angle of attack.
  C — Maintain the RPM, increase the blade angle, and maintain a low angle of attack.
29. If a blade of a particular metal propeller is shortened because of damage to the tip, the remaining blade(s) must be

A — Reset (blade angle) to compensate for the shortened blade.
B — Returned to the manufacturer for alteration.
C — Reduced to conform with the shortened blade.

30. For takeoff, a constant-speed propeller is normally set in the

A — HIGH PTICH, high RPM position.
B — HIGH PTICH, low RPM position
C — LOW PITCH, high RPM position