Compressors, Gas Turbines and Jet Engines The axial flow compressor is preferred in aircraft gas turbines because of High pressure rise Higher thrust Low frontal area None of the listed here High pressure rise Higher thrust Low frontal area None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines A closed cycle gas turbine consists of a Cooling chamber Compressor Heating chamber All of these Cooling chamber Compressor Heating chamber All of these ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines A simple turbojet engine is basically Gas turbine engine equipped with a propulsive nozzle and diffuse Chemical rocket engine Ramjet engine A propeller system Gas turbine engine equipped with a propulsive nozzle and diffuse Chemical rocket engine Ramjet engine A propeller system ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines Which of the following statement is correct as regard to centrifugal compressors? The impeller rotates at high speeds The flow of air is parallel to the axis of the compressor The static pressure of air in the impeller increases in order to provide centripetal force on the air The maximum efficiency is higher than multistage axial flow compressors The impeller rotates at high speeds The flow of air is parallel to the axis of the compressor The static pressure of air in the impeller increases in order to provide centripetal force on the air The maximum efficiency is higher than multistage axial flow compressors ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines If V, U and Vr represent the absolute velocity of fluid, velocity of blade, and relative velocity of fluid, and suffix ‘I’ and ‘o’ stand for entry and exit conditions, then in a rotary machine whose degree of reaction is unity V = Uo Vt > Vo U < Vo Vi = Vo V = Uo Vt > Vo U < Vo Vi = Vo ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines High air-fuel ratio in gas turbines Do not damage turbine blades Increases power output Improves thermal efficiency Reduces exhaust temperature Do not damage turbine blades Increases power output Improves thermal efficiency Reduces exhaust temperature ANSWER DOWNLOAD EXAMIANS APP
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