Compressors, Gas Turbines and Jet Engines In a reciprocating air compressor, the compression work per kg of air Decreases as clearance volume increases Increases as clearance volume increases Increases as clearance volume decreases Is independent of clearance volume Decreases as clearance volume increases Increases as clearance volume increases Increases as clearance volume decreases Is independent of clearance volume ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines The overall isothermal efficiency of compressor is defined as the ratio of Power to drive compressor to isothermal h.p. Isothermal h.p. to adiabatic h.p. Work to compress air isothermally to work for actual compression Isothermal h.p. to the BHP of motor Power to drive compressor to isothermal h.p. Isothermal h.p. to adiabatic h.p. Work to compress air isothermally to work for actual compression Isothermal h.p. to the BHP of motor ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines Volumetric efficiency of a compressor without clearance volume Increases with increase in compression ratio May increase/decrease depending on compressor capacity Decreases with increase in compression ratio Is not dependent upon compression ratio Increases with increase in compression ratio May increase/decrease depending on compressor capacity Decreases with increase in compression ratio Is not dependent upon compression ratio ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines An after-cooler is used to Reduce volume of air Cool the air Remove impurities from air Cause moisture and oil vapour to drop out Reduce volume of air Cool the air Remove impurities from air Cause moisture and oil vapour to drop out ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines Ram compression in turbojet involves Compression of inlet air Lost work Increasing speed of incoming air Reduction of speed of incoming air and conversion of part of it into pressure energy Compression of inlet air Lost work Increasing speed of incoming air Reduction of speed of incoming air and conversion of part of it into pressure energy ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines Cylinder clearance in a compressor should be As small as possible As large as possible About 50% of swept volume About 100% of swept volume As small as possible As large as possible About 50% of swept volume About 100% of swept volume ANSWER DOWNLOAD EXAMIANS APP
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