## Compressors, Gas Turbines and Jet Engines In axial flow compressor, exit flow angle deviation from the blade angle is a function of

Space-chord ratio

## Compressors, Gas Turbines and Jet Engines The degree of reaction in an axial flow compressor is defined as the ratio of static enthalpy rise in the

Rotor to static enthalpy rise in the stage
Stator to static enthalpy rise in the stage
Stator to static enthalpy rise in the rotor
Rotor to static enthalpy rise in the stator

## Compressors, Gas Turbines and Jet Engines If p₁ is the pressure of air entering the L.P, cylinder and p₃ is the pressure of air leaving the H.P. cylinder, then the ratio of cylinder diameters for a single acting, two stage reciprocating compressor with complete intercooling is given by

D₁/D₂ = (p₁/p₃)1/4
D₁/D₂ = (p₃/p₁)1/4
D₁/D₂ = (p₁ p₃)1/4
D₁/D₂ = (p₁ p₃)1/2

## Compressors, Gas Turbines and Jet Engines Choose the correct statement

Gas turbines have high standby losses and require lot of maintenance
Gas turbines has flat efficiency at part loads
Gas turbine requires lot of cooling water

## Compressors, Gas Turbines and Jet Engines Which of the following fuels can be used in turbojet engines?

Liquid hydrogen
High speed diesel oil
Kerosene
Methyl alcohol

## Compressors, Gas Turbines and Jet Engines Isothermal compression efficiency can be attained by running the compressor

At average speed
At zero speed
At very high speed
At very slow speed