Compressors, Gas Turbines and Jet Engines
In the axial flow gas turbine, the work ratio is the ratio of

Actual total head temperature drop to the isentropic total head drop from total head inlet to static head outlet
Output and input
Compressor work and turbine work
Actual compressor work and theoretical compressor work

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Compressors, Gas Turbines and Jet Engines
Pick up the correct statement

Gas turbine's blade will appear as impulse section at the hub and as a reaction section at tip
Gas turbines have their blades similar to steam turbine
Gas turbines use both air and liquid cooling
Large gas turbines use radial inflow turbines

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