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! ! ! Set-3

Propellers

QuestionAnswer
1.Propeller blade stations are measured from the a. blade base. b. hub center-line. c. index mark on the blade shank. b
2.Which of the following occurs to cause front cone bottoming during propeller installation? a. The front cone contacts the ends of the shaft splines, preventing the front and rear cones from being tightened against the cone seats in the propeller hub. b. The front cone becomes bottomed in the front propeller hub cone seat before the rear propeller hub cone seat has engaged the rear cone. c. The front cone enters the front propeller hub cone seat at an angle causing the propeller retaining nut to a a
3.When the centrifugal force acting on the propeller governor flyweights overcomes the tension on the speeder spring, a propeller is in what speed condition? a. Overspeed. b. Underspeed. c. On speed. a
4.During engine operation at speeds lower than those for which the constant-speed propeller control can govern in the INCREASE RPM position, the propeller will a. remain in the full LOW PITCH position. b. maintain engine RPM in the normal manner until the HIGH PITCH stop is reached. c. remain in the full HIGH PITCH position. a
5.What is the primary purpose of the metal tipping which covers the blade tips and extends along the leading edge of each wood propeller blade? a. To prevent impact damage to the tip and leading edge of the blade. b. To increase the lateral strength of the blade. c. To increase the longitudinal strength of the blade. a
6.For takeoff, a constant-speed propeller is normally set in the a. LOW PITCH, high RPM position. b. HIGH PITCH, high RPM position. c. HIGH PITCH, low RPM position. a
7.Ice formation on propellers, when an aircraft is in flight, will a. decrease available engine power. b. increase aircraft stall speed and increase noise. c. decrease thrust and cause excessive vibration. c
8.The holding coil on a hydromatic propeller feathering button switch holds a solenoid relay closed that applies power to the propeller a. governor. b. dome feathering mechanism. c. feathering pump motor. c
9.The primary purpose of a propeller is to a. create lift on the fixed airfoils of an aircraft. b. provide static and dynamic stability of an aircraft in flight. c. change engine horsepower to thrust. c
10.Which of the following is used to correct horizontal unbalance of a wood propeller? a. Solder. b. Brass screws. c. Shellac. a
11.What type of imbalance will cause a two-blade propeller to have a persistent tendency to come to rest in a horizontal position (with the blades parallel to the ground) while being checked on a propeller balancing beam? a. Horizontal. b. Harmonic. c. Vertical. c
12.The blade angle of a fixed-pitch propeller a. increases in proportion to the distance each section is from the hub. b. is greatest at the tip. c. is smallest at the tip. c
13.What are the rotational speed and blade pitch angle requirements of a constant-speed propeller during takeoff? a. Low-speed and high-pitch angle. b. High-speed and low-pitch angle. c. High-speed and high-pitch angle. b
14.Grease used in aircraft propellers reduces the frictional resistance of moving parts and is easily molded into any form under pressure. This statement defines a. viscosity and melting point of grease. b. antifriction and chemical stability of grease. c. antifriction and plasticity characteristics of grease. c
15.On most reciprocating multiengine aircraft, automatic propeller synchronization is accomplished through the actuation of the a. throttle levers. b. propeller control levers. c. propeller governors. c
16.Which of the following determines oil and grease specifications for lubrication of propellers? a. Propeller manufacturers. b. Engine manufacturers. c. Airframe manufacturers. a
17.Which of the following generally renders an aluminum alloy propeller unrepairable? a. Transverse cracks of any size. b. Any slag inclusions or cold shuts. c. Any repairs that would require shortening and recontouring of blades. a
18. Inspection of propeller blades by dye-penetrant inspection is accomplished to detect a. torsional stress. b. corrosion at the blade tip. c. cracks or other defects. c
19.Proper operation of electric deicing boots on individual propeller blades may best be determined by a. feeling the boots to see if they are heating. b. feeling the sequence of boot heating and have an assistant observe the loadmeter indications. c. observing the ammeter or loadmeter for current flow. b
20.When engine power is increased, the constant-speed propeller tries to function so that it will a. increase the RPM, decrease the blade angle, and maintain a low angle of attack. b. maintain the RPM, increase the blade angle, and maintain a low angle of attack. c. maintain the RPM, decrease the blade angle, and maintain a low angle of attack. b
21.A propeller synchrophasing system allows a pilot to reduce noise and vibration by - a. setting the pitch angle of all propellers exactly the same. b. adjusting the phase angle between the propellers on an aircraft's engines. c. adjusting the plane of rotation of all propellers. b
22.If a blade of a particular metal propeller is shortened because of damage to the tip, the remaining blade(s) must be a. reduced to conform with the shortened blade. b. returned to the manufacturer for alteration. c. reset (blade angle) to compensate for the shortened blade. a
23.Repairs of aluminum alloy adjustable pitch propellers are not permitted to be made on which of the following propeller blade areas? a. Face. b. Back. c. Shank. c
24.Where are the high and low pitch stops of a Hamilton Standard constant-speed or two-position counterweight propeller located? a. In the counterweight assembly. b. In the dome assembly. c. In the hub and blade assembly. a
25.The primary reason for careful inspection and prompt repairing of minor surface defects such as scratches, nicks, gouges, etc. on aluminum alloy propellers is to prevent a. corrosion. b. unbalanced aerodynamics. c. fatigue failure. c
Created by: sampizzuto
 

 



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