Compressors, Gas Turbines and Jet Engines High air-fuel ratio is used in gas turbines To increase the efficiency To save fuel To increase the output To reduce the exit temperature To increase the efficiency To save fuel To increase the output To reduce the exit temperature 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/g (v₁ - v₂)²/2g (v₁² -v₂²)/g (v₁² -v₂²)/2g (v₁ - v₂)²/g (v₁ - v₂)²/2g (v₁² -v₂²)/g ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines Inter-cooling in gas turbine results in Decrease in both thermal efficiency and net output Increase in net output but decrease in thermal efficiency Increase in thermal efficiency but decrease in net output Increase in both thermal efficiency and net output Decrease in both thermal efficiency and net output Increase in net output but decrease in thermal efficiency Increase in thermal efficiency but decrease in net output Increase in both thermal efficiency and net output ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines The output of a gas turbine is 300 KW and its efficiency is 20 percent, the heat supplied is 150 KW 15 KW 600 KW 6000 KW 150 KW 15 KW 600 KW 6000 KW ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines The net work input required for compressor with increase in clearance volume Remains same Increases/decreases depending on compressor capacity Decreases Increases Remains same Increases/decreases depending on compressor capacity Decreases Increases ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines If p₁, is the pressure of air entering the L.P. cylinder and p₂ is the pressure of air leaving the L.P. cylinder (or inter-cooler pressure), then the ratio of cylinder diameters for a single acting, two stage reciprocating air compressor with complete intercooling is given by (where D₁ = Dia. of L.P. cylinder, and D₂ = Dia. of H.P. cylinder) None of these D₁/D₂ = p₁/p₂ D₁/D₂ = p₁ p₂ D₁/D₂ = p₂/p₁ None of these D₁/D₂ = p₁/p₂ D₁/D₂ = p₁ p₂ D₁/D₂ = p₂/p₁ ANSWER DOWNLOAD EXAMIANS APP
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