Mechanical Engineering Test Preparations On Compressors, Gas Dynamics and Gas Turbines Part 1

Test Preparation on Mechanical Engineering Test Preparations On Compressors, Gas Dynamics and Gas Turbines Part 2

1.

The axial flow compressor is preferred in air-craft gas turbines because of

1low frontal area
2higher thrust
3high pressure rise
4none of these

2.

Which of the following statement is correct as regards centrifugal compressors?

1The flow of air is parallel to the axis of the compressor.
2The static pressure of air in the impeller increases in order to provide centripetal force on the air.
3The impeller rotates at high speeds.
4The maximum efficiency is higher than multi-stage axial flow compressors.

3.

The ratio of the network obtained from the gas turbine plant to the turbine work is known as

1compression ratio
2work ratio
3pressure ratio
4none of these

4.

The gas turbine as compared to an internal combustion engine

1can be driven at a very high speed
2produces uniform torque
3has more efficiency
4all of these

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