Engineering Thermodynamics
The compression ratio is the ratio of

Swept volume to total volume
Swept volume to clearance volume
Total volume to swept volume
Total volume to clearance volume

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Engineering Thermodynamics
The thermodynamic difference between a Rankine cycle working with saturated steam and the Carnot cycle is that

Carnot cycle can't work with saturated steam
Rankine cycle is hypothetical
A Rankine cycle receives heat at two places
Heat is supplied to water at temperature below the maximum temperature of the cycle

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Engineering Thermodynamics
The condition for the reversibility of a cycle is

All the processes, taking place in the cycle of operation, must be extremely slow
The pressure and temperature of the working substance must not differ, appreciably, from those of the surroundings at any stage in the process
All of these
The working parts of the engine must be friction free

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