Compressors, Gas Turbines and Jet Engines A gas turbine used in air craft should have Small frontal area and high h.p. High h.p. and low weight Low weight and small frontal area High speed and high h.p. Small frontal area and high h.p. High h.p. and low weight Low weight and small frontal area High speed and high h.p. ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines Maximum work is done in compressing air when the compression is None of these Isothermal Polytropic Adiabatic None of these Isothermal Polytropic Adiabatic ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines Axial flow compressor resembles Sliding vane compressor Reciprocating pump Centrifugal pump Turbine Sliding vane compressor Reciprocating pump Centrifugal pump Turbine 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/(W₁ + W₂) W₂/(W₁ + W₂) (W₁ + W₂)/W₁ (W₁ + W₂)/W₂ W₁/(W₁ + W₂) W₂/(W₁ + W₂) (W₁ + W₂)/W₁ (W₁ + W₂)/W₂ ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines Gas turbine blades are given a rake Depending on the velocity In the direction of motion of blades Opposite to the direction of motion of blades Equal to zero Depending on the velocity In the direction of motion of blades Opposite to the direction of motion of blades Equal to zero ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines The specific output per kg mass flow rate of a gas turbine (having fixed efficiencies of compressor and turbine and fixed higher and lower temperature) with increase in pressure ratio will First increase, reach maximum and then decrease Decrease continuously Increase first at fast rate and then slow Increase first at slow rate and then fast First increase, reach maximum and then decrease Decrease continuously Increase first at fast rate and then slow Increase first at slow rate and then fast ANSWER DOWNLOAD EXAMIANS APP
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