145) The volume of air sucked by the compressor during its suction stroke is called

free air delivery

compressor capacity

swept volume

none of these

Answer is:

swept volume

Explanation:

The volume of air sucked by the compressor during its suction stroke is called swept volume.

Compressors Gas dynamics and Gas Turbines MCQ with Answers

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Related Compressors Gas dynamics and Gas Turbines MCQ with Answers

146) The volumetric efficiency of a compressor

constant with decrease in compression ratio

decreases with decrease in compression ratio

increases with increase in compression ratio

decreases with increase in compression ratio

Answer is:

decreases with increase in compression ratio

147) Reheating in a multi-stage expansion gas turbine __________ compressor work.

has no effect on

decreases

increases

none of these

Answer is:

decreases

148) The multi-stage compression of air as compared to single stage compression

improves volumetric efficiency for the given pressure ratio

reduces workdone per kg of air

gives more uniform torque

all of these

Answer is:

all of these

Explanation:

The multi-stage compression of air as compared to single-stage compression
* Improves volumetric efficiency
* Reduces the work done per kg of air
* Gives more uniform torque

149) Which one of the following is the effect of blade shape on performance of a centrifugal compressor ?

Backward curved blades has poor efficiency

Backward curved blades lead to stable performance

Forward curved blades has higher efficiency

Forward curved blades produce lower pressure ratio

Answer is:

Forward curved blades produce lower pressure ratio

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