Compressors, Gas Turbines and Jet Engines The overall isothermal efficiency of compressor is defined as the ratio of Work to compress air isothermally to work for actual compression Isothermal h.p. to the BHP of motor Isothermal h.p. to adiabatic h.p. Power to drive compressor to isothermal h.p. Work to compress air isothermally to work for actual compression Isothermal h.p. to the BHP of motor Isothermal h.p. to adiabatic h.p. Power to drive compressor to isothermal h.p. ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines Gas turbine blades are given a rake In the direction of motion of blades Equal to zero Depending on the velocity Opposite to the direction of motion of blades In the direction of motion of blades Equal to zero Depending on the velocity Opposite to the direction of motion of blades ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines The combustion efficiency of a gas turbine using perfect combustion chamber is of the order of 0.75 0.85 0.99 0.9 0.75 0.85 0.99 0.9 ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines The main purpose of reheating in gas turbine is to Increase temperature Increase power output Reduce turbine size Increase speed Increase temperature Increase power output Reduce turbine size Increase speed ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines In multistage compressor, the isothermal compression is achieved by By insulating the cylinder By running compressor at very slow speed By constantly cooling the cylinder Employing inter-cooler By insulating the cylinder By running compressor at very slow speed By constantly cooling the cylinder Employing inter-cooler ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines During peak load periods, the best method of controlling compressors is Variable speed Start-stop motor Constant speed unloader Relief valve Variable speed Start-stop motor Constant speed unloader Relief valve ANSWER DOWNLOAD EXAMIANS APP
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