Compressors, Gas Turbines and Jet Engines Ram compression in turbojet involves 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 Compression of inlet air Lost work ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines In a single stage, single acting reciprocating air compressor, without clearance, the work-done on the air during isentropic compression is ________ the heat required to raise the temperature of air from T₁ to T₂ at a constant pressure. None of these Equal to Less than Greater than None of these Equal to Less than Greater than ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines Phenomenon of choking in compressor means Fixed mass flow rate regardless of pressure ratio No flow of air Reducing mass flow rate with increase in pressure ratio Increased inclination of chord with air steam Fixed mass flow rate regardless of pressure ratio No flow of air Reducing mass flow rate with increase in pressure ratio Increased inclination of chord with air steam ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines Inter-cooling in multistage compressors is done To cool the air at delivery To enable compression in two stages To cool the air during compression To minimize the work of compression To cool the air at delivery To enable compression in two stages To cool the air during compression To minimize the work of compression ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines Separators are generally used in air compressor installations Before first stage suction After the inter-cooler Between the after-cooler and receiver Before the inter-cooler Before first stage suction After the inter-cooler Between the after-cooler and receiver Before the inter-cooler ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines The efficiency of the vane blower is (where W₁ = Workdone due to compression, and W₂ = Workdone due to back flow) (W₁ + W₂)/W₁ (W₁ + W₂)/W₂ W₂/(W₁ + W₂) W₁/(W₁ + W₂) (W₁ + W₂)/W₁ (W₁ + W₂)/W₂ W₂/(W₁ + W₂) W₁/(W₁ + W₂) ANSWER DOWNLOAD EXAMIANS APP
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