Turbines 2

1. A turbo prop engine will have; what in the back of the propeller as part of the engine ?

• 1. Fan.

• 1. U.D.F.

• 1. A stator.

• 1. A reduction gear box.

1. Air intake on turbine engines is considered to belong to what part of the aircraft?

• 1. Engine.

• 1. Propulsion efficiency.

• 1. Airframe.

• 1. Thermal efficiency.

1. The gas turbine engine developed by Whittle was designed with what type of compressor unit?

• 1. Impellor turbine.

• 1. Centrifugal.

• 1. Branca turbine.

• 1. Axial.

1. What is one advantage that the centrifugal compressor over the axial flow compressor?

• 1. Centrifugal produces more power.

• 1. Centrifugal uses less fuel.

• 1. Centrifugal compressor is shorter.

• 1. Centrifugal is automatically manufacture.

1. The stator vanes in an axial flow compressor can be of two (2) type designs. What are those two types?

• 1. Stationary or vortex tip angles.

• 1. Variable knife-edge seal angles.

• 1. Stationary or high intensity blade angle.

• 1. Stationary or variable angle.

1. There are several designs of combustion chambers. What is the most commonly used in todays modern engine?

• 1. Can Type

• 1. Can Annular type

• 1. Annular type

• 1. Rectifier type

1. On some large engines and now on some small engines a counter rotating turbine system is in use, why?

• 1. Easier to manufacture the parts.

• 1. Damper gyroscopic effect.

• 1. Gives better aerodynamic flow.

• 2. Cheaper to operate the engine.

1. Why are all parts of the turbine stages constructed with lots of clearance or are very loose fit?

• 1. Better fuel burn, easier to spin.

• 1. Easier to make the parts.

• 1. Thermal expansion.

• 1. Better dampening control.

1. Bleed air from the compressor is used to cool certain hot sections of the engine.

Question; When the air has completed its cooling functions, where does this air go?

4. .

• 1. Overboard.

• 1. Back into the gas path.

• 1. Used up for environmental system.

• 1. Used to heat the engine oil up

1. On the PT6 engine, where is the starter mounted

• 1. On the Power Section accessory drive

• 1. On the Gas Generator accessory drive pad

• 1. On the free turbine you can find the input for the pneumatic starter

• 1. On the Compressor Turbine you can find the input for the pneumatic starter