Chemical Engineering Basics
Capacity & power requirement for an air compressor working at high altitude compared to sea-level will be

Same
More
Either more or less; depends on the climatic conditions
Less

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Chemical Engineering Basics
Compression ratio of an I.C. engine is the ratio of the

None of these
Volume of air in cylinder before compression to that after compression
Clearance volume to the volume swept by piston per stroke
Pressure after compression to that before compression

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