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 : 15
The clearance volume of the air compressor is kept minimum because

It allows maximum compression to be achieved

It greatly affects volumetric efficiency

It results in minimum work

It permits isothermal compression

Question No : 16
Losses in a centrifugal compressor are due to

Inlet losses

Impeller channel losses

Diffuser losses

All of the above

Question No : 17
The ideal efficiency of simple gas turbine cycle depends on

Pressure ratio

Maximum cycle temperature

Minimum cycle temperature

All of the above

Question No : 18
The thermal efficiency of a gas turbine as compared to a diesel plant is

Same

Less

Depends on other factors

Question No : 19
Volumetric efficiency of a compressor with clearance volume

Increases with increase in compression ratio

Decreases with increase in compression ratio

In not dependent upon compression ratio

May increase/decrease depending on compressor capacity

Question No : 20
The maximum compression ratio in an actual single stage axial flow compressor is of the order of

1 : 1.2

1 : 2

1 : 5

1 : 10

Question No : 21
Choose the correct statement

Gas turbine requires lot of cooling water

Gas turbine is capable of rapid start up and loading

Gas turbines has flat efficiency at part loads

Gas turbines have high standby losses and require lot of maintenance