RAC Lab
Q1. During a refrigeration cycle, heat is rejected by the refrigerant in a
a. Compressor
b. Evaporator
c. Condenser
d. Expansion valve
Q2. What is Refrigeration?
a. Refrigeration is used to increase the level of humidity in the air by adding heat
b. Refrigeration is the process of adding heat from a substance and cooling it to a temperature
c. Refrigeration is the process of removing heat from a substance and cooling it to a temperature or below the actual temperature
d. None of the above
Q3. The subcooling is a process of cooling the refrigerant in vapour compression refrigeration system
a. Before compression
b. Before throttling
c. After compression
d. After throttling
Q4. In a vapour compression refrigeration system, the effect of superheating the vapour before suction to compression
a. Increases the work of compression
b. Increases the heat rejection in the condenser
c. May increase or decrease C.O.P. depending upon the refrigerant used
d. All of the above
Q5. Which of the following is the S.I. unit to measure pressure in refrigeration?
a. Bar
b. Pascal
c. Joule
d. Newton
