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 W₁/(W₁ + W₂) W₂/(W₁ + W₂) (W₁ + W₂)/W₁ (W₁ + W₂)/W₂ W₁/(W₁ + W₂) W₂/(W₁ + W₂) ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines Propulsion efficiency of the following order is obtained in practice 0.72 0.6 0.34 0.5 0.72 0.6 0.34 0.5 ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines The working fluid in a turbine is In two phases In three phases In a single phase In the form of air and water mixture In two phases In three phases In a single phase In the form of air and water mixture ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines In a single stage, single acting reciprocating air compressor without clearance volume, the work-done is maximum during Isothermal compression Polytropic compression None of these Isentropic compression Isothermal compression Polytropic compression None of these Isentropic compression ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines The air power of the compressor is also known as Brake power Indicated power Frictional power None of these Brake power Indicated power Frictional power None of these ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines If V, U and Vr represent the absolute velocity of fluid, velocity of blade, and relative velocity of fluid, and suffix ‘I’ and ‘o’ stand for entry and exit conditions, then in a rotary machine whose degree of reaction is unity Vt > Vo U < Vo Vi = Vo V = Uo Vt > Vo U < Vo Vi = Vo V = Uo ANSWER DOWNLOAD EXAMIANS APP
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