Q. The intercooler pressure, for minimum work required, for a two stage reciprocating air compressor, is given by (where p1 = Intake pressure of air, p2 = Intercooler pressure, and p3 = Delivery pressure of air)

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Q. The pressure of air at the beginning of the compression stroke is __________ the atmospheric pressure.

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Q. The pressure ratio in a centrifugal compressor can be increased by increasing the tip speed and lowering the inlet temperature.

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Q. 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

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Q. Reheating in a gas turbine

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Q. 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.

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Q. Workdone by an air compressor __________ upon the way in which the air is compressed.

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Q. 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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Q. In a compressed air system, the temperature of air discharged from the air motor is __________ than the initial compressor intake temperature.

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Q. The efficiency of roots blower __________ with the increase in pressure ratio.

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Q. The operation of lifts, rams and pumps make use of compressed air.

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Q. A jet engine has

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Q. A receiver in compressor installations is used to damp pressure waves in compressor discharge.

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Q. The axial flow compressor is preferred in air-craft gas turbines because of

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Q. Which of the following statement is correct as regard to centrifugal compressors?

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Q. The ratio of the net work obtained from the gas turbine plant to the turbine work is known as

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Q. The process, which causes the air to enter the impeller blades of a centrifugal compressor at __________ velocity (without effecting the mass of air to flow and velocity of flow) is known as prewhirl.

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Q. In jet propulsion power unit, the inlet duct of diverging shape is used for converting kinetic energy of air into pressure energy.

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Q. Maximum work is saved in a two stage reciprocating air compressor with incomplete intercooling.

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Q. The mass of gas turbine per kW developed is about __________ as that of an I.C. engine.

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