62) In a centrifugal compressor, the highest Mach number leading to shock wave in the fluid flow occurs at

63) In a centrifugal compressor, the air enters the impeller axially and leaves the vane radially.

64) In gas turbines, the work input with intercooling is __________ the work input with no intercooling.

65) The compressor capacity will be __________ if the temperature of intake air is lowest.

66) A machine used to raise the pressure of air is called