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?

Related Mcqs:

In an ideal solution, the activity of a component equals its __________________?

A. Mole fraction B. Fugacity at the same temperature and pressure C. Partial pressure D. None of these...

Choose the condition that must be specified in order to liquify CO2 (triple point for CO2 is – 57°C and 5.2 atm) ?

A. Pressure must be kept below 5.2 atm B. Temperature must be kept above – 57°C C. Pressure must be kept below 5.2 atm. and temperature must be kept above 57°C D. Pressure and temperature must be kept below 5.2 atm. and – 57°C respectively...

The equilibrium constant for a chemical reaction at two different temperatures is given by__________________?

A. Kp2/Kp1 = – (ΔH/R) (1/T2 – 1/T1) B. Kp2/Kp1 = (ΔH/R) (1/T2 – 1/T1) C. Kp2/Kp1 = ΔH (1/T2 – 1/T1) D. Kp2/Kp1 = – (1/R) (1/T2 – 1/T1)...

Which of the following equations is used for the prediction of activity co-efficient from experiments ?

A. Van Laar equation B. Margules equation C. Wilson’s equation D. All A, B. and C...

_____________ calorimeter is normally used for measuring the dryness fraction of steam, when it is very low?

A. Bucket B. Throttling C. Separating D. A combination of separating & throttling...