The pressure of air at the beginning of the compression stroke is __________ the atmospheric pressure.
In a turbo jet engine, subsequent to heat addition to compressed air, to get the power output, the working substance is expanded in
In a jet engine, the compression varies as the square of the speed.
A rocket works with maximum overall efficiency when air-craft velocity is __________ the jet velocity.
In jet propulsion power unit, the inlet duct of diverging shape is used for converting kinetic energy of air into pressure energy.
A receiver in compressor installations is used to damp pressure waves in compressor discharge.
The compressor capacity will be __________ if the temperature of intake air is lowest.
The perfect intercooling, in multistage compression, means that the temperature of air at inlet to subsequent stages is equal to the initial temperature.
The pressure ratio in a centrifugal compressor can be increased by increasing the tip speed and lowering the inlet temperature.
The air is delivered __________ in one revolution in case of a three-lobbed rotor.
In a single acting reciprocating air compressor, without clearance, the compression of air may be
The volumetric efficiency for reciprocating air compressors is about
The maximum temperature in a gas turbine is
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
Reheating in a gas turbine
In a single stage, single acting reciprocating air compressor, without clearance, the workdone on the air during isentropic compression is __________ the heat required to raise the temperature of air from T1 to T2 at a constant pressure.
Workdone by an air compressor __________ upon the way in which the air is compressed.
In a compressor, work is done on the piston during suction of air and work is done by the piston during compression as well as delivery of air.
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