The overall isothermal efficiency of the compressor is defined as the ratio of w

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Question
The overall isothermal efficiency of the compressor is defined as the ratio of
Options
A. work required to compress the air isothermally to the actual work required to compress the air for the same pressure ratio
B. isothermal power to the shaft power or B.P. of the motor or engine required to drive the compressor
C. volume of free air delivery per stroke to the swept volume of the piston
D. isentropic power to the power required to drive the compressor

Correct Answer

isothermal power to the shaft power or B.P. of the motor or engine required to drive the compressor

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2. The thrust of a jet propulsion power unit can be increased by
Options
A. injecting water into the compressor
B. burning fuel after gas turbine
C. injecting ammonia into the combustion chamber
D. all of the above

5. A 3 m³/min compressor means that it
Options
A. compresses 3 m³/min of standard air
B. compresses 3 m³/ min of free air
C. delivers 3 m³/ min of compressed air
D. delivers 3 m³/ min of compressed air at delivery pressure

6. In a single stage, single acting reciprocating air compressor, without clearance volume, the workdone is minimum during
Options
A. isothermal compression
B. isentropic compression
C. polytropic compression
D. none of these

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