Compressors, Gas Turbines & Jet Engines MCQ Question with Answer

Compressors, Gas Turbines & Jet Engines MCQ with detailed explanation for interview, entrance and competitive exams. Explanation are given for understanding.

Question No : 22
In a single stage, single acting reciprocating air compressor, without clearance volume, the workdone is minimum during

Isothermal compression

Isentropic compression

Polytropic compression

None of these

Question No : 23
Ramjet engine

Is self operating at zero flight speed

Is not self operating at zero flight speed

Requires no air for its operation

Produces a jet consisting of plasma

Question No : 24
Clearance volume in actual reciprocating compressors is essential

To accommodate Valves in the cylinder head

To provide cushioning effect

To attain high volumetric efficiency

To provide cushioning effect and also to avoid mechanical bang of piston with cylinder head

Question No : 25
Ratio of compression is the ratio of

Gauge discharge pressure to the gauge intake pressure

Absolute discharge pressure to the absolute intake pressure

Pressures at discharge and suction corresponding to same temperature

Stroke volume and clearance volume

Question No : 26
A rocket engine uses ________ for the combustion of its fuel.

Surrounding air

Compressed atmospheric air

Its own oxygen

None of these

Question No : 27
The ratio of the discharge pressure to the inlet pressure of air is called

Compression ratio

Expansion ratio

Compressor efficiency

Volumetric efficiency

Question No : 28
High air-fuel ratio is used in gas turbines

To increase the output

To increase the efficiency

To save fuel

To reduce the exit temperature