Compressors, Gas Turbines and Jet Engines The volumetric efficiency for reciprocating air compressors is about 70 to 90% 10 to 40% 60 to 70% 40 to 60% 70 to 90% 10 to 40% 60 to 70% 40 to 60% ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines Gas turbine blades are given a rake Opposite to the direction of motion of blades Depending on the velocity In the direction of motion of blades Equal to zero Opposite to the direction of motion of blades Depending on the velocity In the direction of motion of blades Equal to zero 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 None of these Isentropic compression Polytropic compression Isothermal compression None of these Isentropic compression Polytropic compression ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines A closed gas turbine in which fuel is burnt directly in the air is not possible because of High friction losses Increasing gas temperature Paucity of O2 High specific volume High friction losses Increasing gas temperature Paucity of O2 High specific volume ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines Reheating in multistage expansion gas turbine results in High thermal efficiency Maximum work output Decrease of heat loss in exhaust Reduction in compressor work High thermal efficiency Maximum work output Decrease of heat loss in exhaust Reduction in compressor work ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines For supplying intermittent small quantity of air at high pressure, following compressor is best suited Screw Reciprocating Axial Centrifugal Screw Reciprocating Axial Centrifugal ANSWER DOWNLOAD EXAMIANS APP
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