FAA PROPELLERS 3

An aircraft's propeller system beta range. is used to produce zero or negative thrust. is used to achieve maximum thrust during takeoff. refers to the most fuel efficient pitch range to use at a given engine RPM.

Which of the following statements is true?. During takeoff, propeller thrust (pull) is greatest it the blade angle of attack is low and the engine power setting is high. With the aircraft stationary, propeller thrust is greatest if the blade angle of attack is high and the engine power setting is high. During takeoff, propeller thrust setting is low.

Which of the following statements about constant-speed flyweight propellers is also true when referring to two-position flyweight propellers?. Blade angle changes are accomplished by the use of two forces, one hydraulic and the other centrifugal. Since an infinite number of blade angle positions are possible during flight, propeller efficiency is greatly improved. The pilot selects the RPM and the propeller changes pitch to maintain the selected RPM.

What will happen to the propeller blade angle and the engine RPM if the tension on the propeller governor control spring (speeder spring) is increased?. Blade angle will decrease and RPM will decrease. Blade angle will increase and RPM will decrease. Blade angle will decrease and RPM will increase.

The centrifugal twisting force acting on a propeller blade is. greater than the aerodynamic twisting force and tends to move the blade to a higher angle. less than the aerodynamic twisting force and tends to move the blade to a lower angle. greater than the aerodynamic twisting force and tends to move the blade to a lower angle.

What actuates the pilot valve in the governor of a constant-speed propeller?. Engine oil pressure. Governor flyweights. Governor pump oil pressure.

Ice formation on a propeller blade will. produce unbalance and vibration. increase thrust and drag. cause a change in blade angle.

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

Propeller blade stations are measured from the. index mark on the blade shank. hub centerline. blade base.

Which of the following best describes the blade movement of a propeller that is in the high RPM position when reversing action is begun?. Low pitch directly to reverse pitch. Low pitch through high pitch to reverse pitch. Low pitch through feather position to reverse pitch.

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. remain in the full HIGH PITCH position. maintain engine RPM in the normal manner until the HIGH PITCH stop is reached. remain in the full LOW PITCH position.

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

Which of the following best describes the blade movement of a full-feathering, constant-speed propeller that is in the LOW RPM position when the feathering action is begun?. High pitch through low pitch to feather position. High pitch directly to feather position. Low pitch through high pitch to feather position.

How can a steel propeller hub be tested for cracks?. By anodizing. By magnetic particle inspection. By etching.

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?. To increase the lateral strength of the blade. To prevent impact damage to the tip and leading edge of the blade. To increase the longitudinal strength of the blade.

One of the advantages of inspecting an aluminum propeller utilizing dye-penetrant inspection procedure is that. defects just below the surface are indicated. it shows whether visible lines and other marks are actually cracks rather than scratches. it indicates overspeed condition.

If a flanged propeller shaft has dowel pins. install the propeller so the blades are positioned for hand propping. the propeller can only be installed in a given position. the front cone should be checked for bottoming against the pins.

Removal of propeller blade tips within Type Certificate Data Sheet limits when correcting a defect is. a major alteration. a major repair. permitted under the privileges and limitations of a powerplant rating.

The angle-of-attack of a rotating propeller blade is measured between the blade chord or face and which of the following?. Plane of blade rotation. Full low-pitch blade angle. Relative airstream.

What operational force causes the greatest stress on a propeller?. Aerodynamic twisting force. Centrifugal force. Thrust bending force.

What are the rotational speed and blade pitch angle requirements of a constant-speed propeller during takeoff?. Low speed and high-pitch angle. High speed and low-pitch angle. High speed and high-pitch angle.

Which of the following statements concerning the installation of a new fixed-pitch wood propeller is true?. Inspect the bolts for proper torque after every 50 hours and annual inspection. Install and tighten the bolts to the proper torque during installation; no inspection interval after that. Inspect the bolts for proper torque after the first flight and after the first 25 hours of flying.

What normally prevents a Hartzell Compact propeller from going to feather when the engine is shut down on the ground?. Propeller cylinder air pressure. A latch mechanism composed of spring and lock pins. Accumulator provided oil pressure.

Which of the following functions requires the use of a propeller blade station?. Measuring blade angle. Indexing blades. Propeller balancing.

The low pitch stop on a constant-speed propeller is usually set so that. the engine will turn at its rated takeoff RPM at sea level when the throttle is opened to allowable takeoff manifold pressure. maximum allowable engine RPM cannot be exceeded with any combination of manifold pressure, altitude, or forward speed. the limiting engine manifold pressure cannot be exceeded with any combination of throttle opening, altitude, or forward speed.

The propeller blade angle is defined as the acute angle between the airfoil section chord line (at the blade reference station) and which of the following?. The plane of rotation. The relative wind. The axis of blade rotation during pitch change.

How is a propeller controlled in a Large aircraft with a turboprop installation?. Independently of the engine. By varying the engine RPM except for feathering and reversing. By the engine power lever.

How is the speed of a constant-speed propeller changed in flight?. By varying the output of the governor booster pump. By advancing or retarding the throttle. By changing the load tension against the flyweights in the governor.

The actual distance a propeller moves forward through the air during one revolution is known as the. effective pitch. geometric pitch. relative pitch.

Proper operation of electric deicing boots on individual propeller blades may best be determined by. feeling the sequence of boot heating and have an assistant observe the loadmeter indications. observing the ammeter or loadmeter for current flow. feeling the boots to see if they are heating.

Propeller blade angle is the angle between the. chord of the blade and the relative wind. relative wind and the rotational plane of the propeller. chord of the blade and the rotational plane of the propeller.

Propeller aerodynamic (thrust) imbalance can be largely eliminated by. correct blade contouring and angle setting. static balancing. keeping the propeller blades within the same plane of rotation.

Why is the pulley stop screw on a propeller governor adjustable?. To limit the maximum engine speed during takeoff. To maintain the proper blade angle for cruising. To limit the maximum propeller pitch for takeoff.

What controls the constant-speed range of a constant-speed propeller?. Engine RPM. Angle of climb and descent with accompanying changes in airspeed. The mechanical limits in the propeller pitch range.

It is important that nicks in aluminum alloy propeller blades be repaired as soon as possible in order to. maintain equal aerodynamic characteristics between the blades. eliminate stress concentration points. equalize the centrifugal loads between the blades.

Grease used in aircraft propellers reduces the frictional resistance of moving parts and is easily molded into any form under pressure. This statement defines. antifriction and plasticity characteristics of grease. antifriction and chemical stability of grease. viscosity and melting point of grease.

When engine power is increased, the constant-speed propeller tries to function so that it will. maintain the RPM, decrease the blade angle, and maintain a low angle of attack. increase the RPM, decrease the blade angle, and maintain a low angle of attack. maintain the RPM, increase the blade angle, and maintain a low angle of attack.

The blade angle of a fixed-pitch propeller. is greatest at the tip. is smallest at the tip. increases in proportion to the distance each section is from the hub.

What unit in the propeller anti-icing system controls the output of the pump?. Pressure relief valve. Rheostat. Cycling timer.

Which of the following statements is true?. A mechanic certificate with a powerplant rating authorizes the holder to repair deep scars, nicks, and dents on aluminum propeller blades. A mechanic certificate with a powerplant rating authorizes the holder to perform minor straightening of steel propeller blades. A mechanic certificate with a powerplant rating does not authorize the holder to perform major repairs on aluminum propeller blades.