FREE AND STUDY GAMES ABOUT PROPELLERS EXAM

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FREE AND STUDY GAMES ABOUT PROPELLERS EXAM

QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

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-Guarantee passing score -28 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: When engine power is increased, the constant-speed propeller will try and do what? (in relation to rpm, blade angle and AOA)

Answer:

The prop governor cause the blade angle to INCREASE in order to MAINTAIN the selected rpm.With an increase in power, the airspeed may increase, which makes the relative aoa of the blades LOW (in relation to relative wind).Question 2: Where are the high & low pitch stops of a Hamilton Standard constant-speed or 2-position counterweight prop located?

Answer:

In the counterweight assembly Question 3: Why is a constant-speed counterweight prop normally placed in full HIGH-PITCH position before the engine is stopped?

Answer:

To prevent exposure/corrosion of the pitch changing mechanism *Allows cylinder to move back & cover/protect the piston. (Hamilton Standard counterweight prop) *On other types of props without this problem, engine should be shut down in LOW pitch

Question 4: Where would you look to find an alternate replacement for a damaged prop on a specific aircraft?

Answer:

Aircraft Specifications/Aircraft TCDS

Question 5: Primary purpose of a propeller is to change _ into _?

Answer:

Horsepower into Thrust Question 6: What determines oil/grease specifications for lubrication of propellers?

Answer:

Prop Manufacturer's instructions Question 7: What methods can be used to straighten a bent aluminum prop (within limits)?What's the reference?

Answer:

AC43.13-1A par 55: Cold straightened (only by FAA-Approved repair station)

AC 43.13-1B par 8-73c: "Never straighten a damaged prop", [may] damage it internally Question 8: Propeller aerodynamic (thrust) imbalance can be largely eliminated by _?

Answer:

Correct blade contouring and angle setting. (Thrust of the blades is unequal) Question 9: Minor surface damage in a repairable area, but not on leading/trailing edges may be repaired by filing with a _ file.

Answer:

Riffle file (Spoon-like file, removes rough edges and forms a shallow dish-shaped depression with a smooth surface).Question 10: Constant speed non-feathering props (McCauley, Hartzell etc) without counterweights increase pitch angle using what?

Answer:

Oil Pressure. Opposes centrifugal twisting forces that pull blades toward low pitch.

Question 11: Repairs of aluminum alloy adjustable pitch props are not permitted in which area?

Answer:

Shank Question 12: The holding coil on a hydro attic prop feathering button switch holds a solenoid relay closed that applies power to the prop _?

Answer:

Feathering pump motor *The holding coil holds the feather button depressed and the feathering pump operating until the prop is feathered. Then, oil pressure builds up high enough to open the oil pressure switch in the governor.

Question 13: What causes Front Cone Bottoming during prop installation?

Answer:

The front cone contacts the ends of the shaft splines, which keeps front & rear cones from being tightened against the cone seats in the prop hub. Even if retaining nut is torqued to spec, the prop will not be tight on the cones.Question 14: What actuates the pilot valve in the governor of a constant-speed propeller?

Answer:

It is actuated by the balance between centrifugal force on the flyweights, and the compression of the speeder spring.

Question 15: What is the purpose of using an Arbor while balancing a propeller?

Answer:

It helps support the propeller on the balance knives.Question 16: When lubricating a newly overhauled steel hub prop, you should lubricate the prop (when)?

Answer:

After 1-2 hrs of operation *Centrifugal loads pack/redistribute grease, could result in a prop imbalance.Question 17: When the centrifugal force acting on the Prop Governor Flyweights overcomes the tension on the speeder spring, the prop is in what kind of speed condition?

Answer:

Over speed *When centrifugal force on the flyweights overcomes the speeder spring force, the prop is in over speed. The governor will increase the blade angle to slow the propeller.

Question 18: How is a McCauley prop feathered?

Answer:

Drain the oil out of the prop

Question 19: What is Front Cone bottoming? What does it cause?

Answer:

Condition where the front prop cone contacts the end of the shaft splines. Prop cannot be fully seated, galling of the cones and cone seats will result.Question 20: How does the prop overspeed governor on a turboprop engine decrease prop RPM?

Answer:

The governor pushes oil into prop shaft, to servo piston via oil transfer sleeve (mounted on prop shaft).Pressure pushes piston fwd, compresses feather spring. Lever system transfers movement from piston to blade collars. Pushes blades to low pitch.Question 21: Where are the high and low pitch stops located on a Hamilton Standard Constant-Speed (or) 2-position counterweight prop?

Answer:

In the counterweight assembly.*In some more modern props, could be inside the piston, or externally as part of the pushrod.

Question 22: Define Prop BLADE angle

Answer:

The angle between the chord of the blade, and the rotational plane of the propeller Question 23: Where could you find the engines that a specific propeller can be installed on?

Answer:

Propeller TCDS

Question 24: What is the purpose of a 3-way propeller valve?

Answer:

Directs oil from the engine oil system to the propeller cylinder.*Used in a 2-position hydraulically controlled prop. Directs oil into the prop cylinder, and drains from the cylinder back into the engine sump.