Q. If p1, is the pressure of air entering the L.P. cylinder and p2 is the pressure of air leaving the L.P. cylinder (or intercooler pressure), then the ratio of cylinder diameters for a single acting, two stage reciprocating air compressor with complete intercooling is given by (where D1 = Dia. of L.P. cylinder, and D2 = Dia. of H.P. cylinder)

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Q. The ratio of the indicated power to the shaft power or brake power of the motor or engine required to drive the compressor, is called

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Q. Which of the following statement is wrong?

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Q. In a single acting reciprocating compressor, the suction, compression and delivery of air takes place in __________ of the piston.

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Q. The increase in pressure in a vane blower takes place first due to compression and then due to back flow of air.

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Q. The maximum delivery pressure in a rotary air compressor is

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Q. The capacity of a compressor is expressed in

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Q. The increase in pressure in a roots blower is entirely due to back flow of air.

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Q. The type of rotary compressor used in aeroplanes, is of

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Q. An axial compressor gives optimum performance at high speeds and large volume flows.

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Q. In a reciprocating air compressor, the compression work per kg of air

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Q. The degree of reaction in an axial flow compressor is defined as the ratio of static enthalpy rise in the

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Q. In axial flow compressor, exit flow angle deviation from the blade angle is a function of

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Q. Rotary compressors are used for delivering

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Q. Workdone by a two-stage reciprocating air compressor per cycle is equal to the workdone in LP. cylinder and H.P. cylinder.

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Q. A rotary compressor is driven by an

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Q. In a centrifugal compressor, an increase in speed at a given pressure ratio causes

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Q. A large clearance Volume in a reciprocating compressor results in

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Q. A closed cycle gas turbine gives __________ efficiency as compared to an open cycle gas turbine.

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Q. Gas turbine as compared to steam turbine

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