Compressors, Gas Turbines and Jet Engines The working fluid in a turbine is In a single phase In two phases In the form of air and water mixture In three phases In a single phase In two phases In the form of air and water mixture In three phases ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines For an irreversible gas turbine cycle, the efficiency and work ratio both depend on Pressure ratio alone Both pressure ratio and maximum cycle temperature Minimum cycle temperature alone Maximum cycle temperature alone Pressure ratio alone Both pressure ratio and maximum cycle temperature Minimum cycle temperature alone Maximum cycle temperature alone ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines Gas turbine as compared to internal combustion engine Produces uniform torque Has more efficiency Can be driven at a very high speed All of the listed here Produces uniform torque Has more efficiency Can be driven at a very high speed All of the listed here 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) D₁/D₂ = p₁/p₂ None of these D₁/D₂ = p₂/p₁ D₁/D₂ = p₁ p₂ D₁/D₂ = p₁/p₂ None of these D₁/D₂ = p₂/p₁ D₁/D₂ = p₁ p₂ ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines Isothermal compression efficiency, even when running at high speed, can be approached by using Cold water spray Both (A) and (B) above Fully insulating the cylinder Multistage compression Cold water spray Both (A) and (B) above Fully insulating the cylinder Multistage compression ANSWER DOWNLOAD EXAMIANS APP
Compressors, Gas Turbines and Jet Engines Which of the following statement is correct as regard to centrifugal 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 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 ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS