Recent questions in PPE

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Consider the following statements regarding the axial flow in an air compressor:

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When air to be compressed to reasonably high pressure, it is usually carried out by

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In a reciprocating air compressor the compression work per kg of air

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A large clearance volume in reciprocating compressor results in

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The turbomachine is

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The work required per kg of air flow/ min. for axial flow compressor is

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In a centrifugal compressor, the highest Mach number leading to shockwave in the fluid flow occurs at

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Which of the following beadings will be given the maximum pressure rise?

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The permissible operating range of the compressor is represented by the part of the curve from

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Phenomenon of chocking in compressor means

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Which one of the following type of compressor is mostly used for supercharging of I.C. engine

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The volumetric efficiency of a compressor depends upon

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The usual assumption in elementary compressor cascade theory is that

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Degree of reaction in an axial compressor is defined as the ratio static enthalpy rise in the

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Surging basically implies

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Which one of the following is the effect of blade shape on performance of centrifugal compressor?

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For a multi- stage compressor, the polytropic efficiency is

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The heat rejection by a reciprocating air compressor

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Centrifugal compressors are suitable for large discharge and wider mass flow range

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The blade tips the degree of reaction in a centrifugal compressor is equal to

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