Piston Engines - Performance and Power Augmentation: DGCA Technical General questions

Question 1

The wastegate is operated by:

Accepted Answer

the wastegate actuator

Answer

the automatic boost control unit

Answer

inlet manifold pressure

Answer

exhaust gas temperature

Question 2

The primary purpose of a supercharger is to:

Accepted Answer

increase the mass of the charge entering the cylinder

Answer

raise the temperature of the charge entering the cylinder

Answer

improve the engine's exhaust scavenging capability, and hence increase its power output

Answer

allow the use of high octane fuel

Question 3

If the wastegate of a turbocharged engine seizes in the climb before critical altitude has been reached:

Accepted Answer

engine power will fall as the climb continues

Answer

engine power will be automatically adjusted by the ABC

Answer

engine power will rise by approximately 10%

Answer

reducing back pressure will compensate for any loss in power

Question 4

An internal supercharger is one which:

Accepted Answer

compresses the mixture

Answer

is driven by exhaust gases

Answer

compresses the air

Answer

compresses the exhaust gases

Question 5

The compressor output pressure of an internal supercharger is:

Accepted Answer

the same as manifold pressure

Answer

greater than the manifold pressure

Answer

sometimes greater, sometimes less than the manifold pressure

Answer

less than the manifold pressure

57 more questions in this chapter, free with an account