The co-efficient of performance (COP) of a refrigerating system, which is its index of performance, is defined as the ratio of useful refrigeration to the net work. The units of _____________ and COP are the same?
Correct answer: D. None of these
- A. Kinematic viscosity
- B. Work
- C. Temperature
- D. None of these
Explanation
COP is a ratio of refrigeration effect to work input, so it is dimensionless. Work has energy units, whereas neither kinematic viscosity nor temperature has the same units as COP.
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