ISRO Technician-B MRAC Question Paper - 2016 (Set -1) with Answer Key

6) In a vapour compression refrigeration cycle, the lowest temperature occurs in

Answer is:

evaporator

7) The co-efficient of performance (COP) is defined as

Answer is:

Heat absorbed from the system / work done on the system

8) The capacity of a refrigerator is 1 TR. This means that the heat removing capacity (or refrigeration effect) of the refrigerator is

Answer is:

3000 kcal/hr

9) In Electrolux refrigerator

Answer is:

ammonia evaporates in hydrogen

10) Critical temperature is the temperature above which

Answer is:

a gas will never liquefy

Explanation:

Gases can be converted to liquids by compressing the gas at a suitable temperature.
Gases become more difficult to liquefy as the temperature increases because the kinetic energies of the particles that make up the gas also increase.
The critical temperature of a substance is the temperature at and above which vapor of the substance cannot be liquefied, no matter how much pressure is applied.