Compressors, Gas Turbines and Jet Engines The maximum propulsion efficiency of a turbojet is attained at around following speed 2400 km/hr 550 km/hr 1050 km/hr 1700 km/hr 2400 km/hr 550 km/hr 1050 km/hr 1700 km/hr ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines The efficiency and work ratio of a gas turbine plant can be increased by Injecting water in/around combustion chamber Adding heat exchanger All of these Reheating the air after partial expansion in the turbine Injecting water in/around combustion chamber Adding heat exchanger All of these Reheating the air after partial expansion in the turbine ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines In a jet propulsion unit, the products of combustion after passing through the gas turbine are discharged into Discharge nozzle Vacuum Atmosphere Back to the compressor Discharge nozzle Vacuum Atmosphere Back to the compressor ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines For perfect intercooling in a two stage compressor p₂/p₁ = p₃/p₂ p₁/p₃ = p₂/p₁ p₁ = p₂ p3 p₁ = p3 p₂/p₁ = p₃/p₂ p₁/p₃ = p₂/p₁ p₁ = p₂ p3 p₁ = p3 ANSWER DOWNLOAD EXAMIANS APP
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 High speed and high h.p. Low weight and small frontal area Small frontal area and high h.p. High h.p. and low weight High speed and high h.p. Low weight and small frontal area ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines The advantage of multistage compression over single stage compression is Lower power consumption per unit of air delivered All of these Higher volumetric efficiency Decreased discharge temperature Lower power consumption per unit of air delivered All of these Higher volumetric efficiency Decreased discharge temperature ANSWER DOWNLOAD EXAMIANS APP
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