Compressors, Gas Turbines and Jet Engines Volumetric efficiency of a compressor without clearance volume Decreases with increase in compression ratio Is not dependent upon compression ratio May increase/decrease depending on compressor capacity Increases with increase in compression ratio Decreases with increase in compression ratio Is not dependent upon compression ratio May increase/decrease depending on compressor capacity Increases with increase in compression ratio ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines The pressure ratio of an ideal vaned compressor with increase in mass flow rate Remain constant Increases First decreases and then increases Decreases Remain constant Increases First decreases and then increases Decreases ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines The mean effective pressure of the compressor is the Volume of air delivered by the compressor Actual volume of the air delivered by the compressor when reduced to normal temperature and pressure conditions None of these Volume of air sucked by the compressor during its suction stroke Volume of air delivered by the compressor Actual volume of the air delivered by the compressor when reduced to normal temperature and pressure conditions None of these Volume of air sucked by the compressor during its suction stroke ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines Reheating in gas turbine results in Decrease of work ratio Decrease of thermal efficiency Both (A) and (B) above Increase of work ratio Decrease of work ratio Decrease of thermal efficiency Both (A) and (B) above Increase of work ratio ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines A closed gas turbine in which fuel is burnt directly in the air is not possible because of High friction losses Paucity of O2 High specific volume Increasing gas temperature High friction losses Paucity of O2 High specific volume Increasing gas temperature 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 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 flow of air is parallel to the axis of the compressor The impeller rotates at high speeds 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 flow of air is parallel to the axis of the compressor ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS