Compressors, Gas Turbines and Jet Engines A closed gas turbine in which fuel is burnt directly in the air is not possible because of Paucity of O2 High friction losses Increasing gas temperature High specific volume Paucity of O2 High friction losses Increasing gas temperature High specific volume ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines In a single stage, single acting reciprocating air compressor, without clearance volume, the work-done is minimum during Isentropic compression Polytropic compression Isothermal compression None of these Isentropic compression Polytropic compression Isothermal compression None of these ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines Volumetric efficiency is The ratio of the air actually delivered to the amount of piston displacement The ratio of stroke volume to clearance volume Index of compressor performance Reciprocal of compression ratio The ratio of the air actually delivered to the amount of piston displacement The ratio of stroke volume to clearance volume Index of compressor performance Reciprocal of compression ratio ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines Reheating in gas turbine results in Decrease of thermal efficiency Increase of work ratio Decrease of work ratio Both (A) and (B) above Decrease of thermal efficiency Increase of work ratio Decrease of work ratio Both (A) and (B) above ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines The maximum propulsion efficiency of a turbojet is attained at around following speed 2400 km/hr 1050 km/hr 550 km/hr 1700 km/hr 2400 km/hr 1050 km/hr 550 km/hr 1700 km/hr ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines The ratio of the volume of free air delivery per stroke to the swept volume of the piston, is known as Volumetric efficiency Mechanical efficiency Isothermal efficiency Compressor efficiency Volumetric efficiency Mechanical efficiency Isothermal efficiency Compressor efficiency ANSWER DOWNLOAD EXAMIANS APP
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