COMPRESSORS, GAS TURBINES AND JET ENGINES QUIZ

It does not increase pressure much

Compressor has to run at very slow speed to achieve it

It is impossible in practice

It requires very big cylinder

Better than isothermal and adiabatic

Same as adiabatic

Same as isothermal

In between isothermal and adiabatic

Increase in flow

Increase in flow and decrease in efficiency

Decrease in flow

Increase in efficiency

To increase the output

To increase the efficiency

To reduce the exit temperature

To save fuel

Air stream not able to follow the blade contour

Air stream blocking the passage

Unsteady periodic and reversed flow

Motion of air at sonic velocity

May increase or decrease depending on clearance volume

Remain same

Decrease

Increase

Any one of these

Polytropic

Isentropic

Isothermal

Is the standard practice for big compressors

Cools the delivered air

Results in saving of power in compressing a given volume to given pressure

Enables compression in two stages

As small as possible

As large as possible

About 50% of swept volume

About 100% of swept volume

Same

Lower

Higher

None of these