Compressors, Gas Turbines and Jet Engines The overall isothermal efficiency of compressor is defined as the ratio of Isothermal h.p. to adiabatic h.p. Isothermal h.p. to the BHP of motor Power to drive compressor to isothermal h.p. Work to compress air isothermally to work for actual compression Isothermal h.p. to adiabatic h.p. Isothermal h.p. to the BHP of motor Power to drive compressor to isothermal h.p. Work to compress air isothermally to work for actual compression ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines Volumetric efficiency of air compressors is of the order of 40 - 50% 60 - 70% 70 - 90% 20 - 30% 40 - 50% 60 - 70% 70 - 90% 20 - 30% ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines The propulsive power of the rocket is (where v₁ = Jet velocity, and v₂ = Aircraft velocity) (v₁² -v₂²)/2g (v₁ - v₂)²/2g (v₁² -v₂²)/g (v₁ - v₂)²/g (v₁² -v₂²)/2g (v₁ - v₂)²/2g (v₁² -v₂²)/g (v₁ - v₂)²/g ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines Reheating in a multistage expansion gas turbine ________ compressor work. Decreases Has no effect on None of these Increases Decreases Has no effect on None of these Increases ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines The gas in cooling chamber of a closed cycle gas turbine is cooled at Constant volume None of the listed here Constant temperature Constant pressure Constant volume None of the listed here Constant temperature Constant pressure ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines Producer gas is produced by Partial combustion of coal, coke, anthracite coal or charcoal in a mixed air steam blast Carbonisation of coal Passing air and a large amount of steam over waste coal at about 65°C Passing steam over incandescent coke Partial combustion of coal, coke, anthracite coal or charcoal in a mixed air steam blast Carbonisation of coal Passing air and a large amount of steam over waste coal at about 65°C Passing steam over incandescent coke ANSWER DOWNLOAD EXAMIANS APP
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