M17

In which case the angle ok attack is less than blade angle?. when the airplane is on the runway during the take off. when the engine cuts off. when the propeller is rotating an it is also moving forward.

Where is generally used the low blade angle configuration?. For variable-pitch propellers installed on aircrafts that must get maximum performance during take-off and climb. For fixed-pitch propellers installed on aircrafts that must get maximum performance during land-on and descent. For fixed-pitch propellers installed on aircrafts that must get maximum performance during take-off and climb.

What is the effective pitch?. Is the ideal distance that propeller covers forward in one revolution. Is the real distance that propeller covers forward in half revolution. Is the real distance that propeller covers forward in one revolution.

What is the zero-thrust propeller condition?. This situation occurs when the blades rotate in the air with a specific angle of attack that doesn’t allow the thrust generation. Efficiency is negative. This situation occurs when the blades rotate in the air with a specific angle of attack that doesn’t allow the thrust generation. Efficiency is positive. This situation occurs when the blades rotate in the air with a specific angle of attack that doesn’t allow the thrust generation. Efficiency is zero.

Which is the typical value range for the propulsive efficiency of a propeller?. 50-85%. 30-55%. 75-90%.

What is the conditions in which the angle of attack is the same as the blade angle?. during take off phase. when a propeller rotates in a stationary aircraft in an airport apron. during the flight.

What is the braking propeller condition?. The propeller gives a certain quantity of power to the engine, that is spent to win the drag and to slow down the airflow. The propeller absorbs a certain quantity of power from the engine, that is spent to win the drag and to slow down the airflow. The propeller gives a certain quantity of power to the engine, that is spent to win the drag and to accelerate the airflow.

When the blade tips approach the speed of sound?. During cruise. During take-off. During climb phase.

Which one is the old classical configuration for propellers?. Four blades propeller. Two blades propeller. Three blades propeller.

Which is a typical range for propeller propulsive efficiency?. 50-85%. 90-100%. 20-35%.

Which is the result of an increase of the blade area?. the reduction of the propeller RPM at fixed-pitch and the obtaining of the same performance with a decrease prop diameter. RPM increasing. RPM reduction.

Comparing the wood and the aluminium for the propeller construction is possible to say: Aluminium lets to construct thinner but less efficient blades. Aluminium lets to construct thicker and more efficient blades. Aluminium lets to construct thinner and more efficient blades.

For which kind of aircraft the scimitar tip type have been developed. helicopters. light aircraft. high-speed applications.

After the forging, how is shaped the aluminium propeller?. Using press-fusion method. By extrusion. By machine and manual grinding.

How is the wing efficiency of pusher-type aircrafts?. Higher. Is the same as tractor propeller aircrafts. Lower.

How are secured removable blades of a propeller?. Through a threaded end. With a set of clamping rings. Using pins.

How is also called the speed governor?. Constant Selector Unit (CSU). Constant Speed Unit (CSU). Constant Speed Hydro-Mechanical Unit (CSHMU).

How many methods are there for the actuation of the variable pitch system?. 3. 1. 2.

To what corresponds the Flight Fine Pitch configuration?. This corresponds with a pitch angle of approximately 0°. This corresponds with a high positive pitch and a fairly low rpm developed by the engine. This corresponds with the minimum positive pitch that the propeller can take in flight developing the maximum engine power and reaching the possible rpm.

What does the actuator, connected to the propeller blades, allow?. to change the pitch of the blades. to change the blades profile. to keep constant the pitch of the blades.

When is generally used the cut-off lever?. In feathered pitch configuration. In reverse pitch configuration. In Light fine pitch configuration.

In alpha mode the speed governor is controlled by what?. Is controlled by the throttle lever for controlling the system. Is controlled by the condition lever for controlling the system thrust. Is controlled by the condition lever for controlling the system rpm.

When the higher pitch is selected?. when the high pressure oil is directed towards the hub. when the high pressure oil is directed towards the propeller shaft. when the low pressure oil is directed towards the hub.

The pitch control system in modern aircrafts is: Both the previous answers are correct. Automatic. Manual.

Which are the causes of malfunction in a propeller synchronization system?. lack of electricity to main control, a defect in the rotating contact or failure of the DC generator. increase in oil temperature. lack of electricity to main control.

When a propeller synchronization system can be used?. in any flight phase except take off and landing. only in take off and landing phases. only in cruise phase.

How is obtained the scope of the Simultaneous Control System?. Through Cables. Through wires. Through bars.

Which element is characteristic in a multi-engine De-icing System?. A timer. A rheostat. A capacitor.

Which one is the most common cause of entire De-icing System fault?. De-icing boots damage. Timer fault. Cables of connection.

What is required to do if is found a corroded tube in the Anti-icing System?. The tubes must be removed and the corroded area treated. If the corrosion is not extended, the tube can be left in position and checked again after 20 flight hours. The tube must be substituted in any case.

Which is the shape of slinger ring?. can be U shaped and V shaped too. V shaper. C shaped.

What corrections are allowed to eliminate the propeller imbalance?. the addition of permanent masses in predefine locations and the removal of weights from pre-established positions. the addition of blades in predefine locations. the removal of blades from pre-established positions.