Compressors, Gas Turbines and Jet Engines
Stalling of blades in axial flow compressor is the phenomenon of

Motion of air at sonic velocity
Air stream blocking the passage
Air stream not able to follow the blade contour
Unsteady periodic and reversed flow

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

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

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