Questions and answers for exam Preparation

MCQs

Total Questions : 1342 | Page 131 of 135 pages

Question 1301. A valve which maintains a constant degree of superheat at the end of the evaporator coil, is called

Automatic expansion valve
Thermostatic expansion valve
High side float valve
Low side float valve

Discuss Question

Answer: Option D. -> Low side float valve

Question 1302. Absorption system normally uses the following refrigerant

Freon-11
CO2
Freon-22
Ammonia

Discuss Question

Answer: Option D. -> Ammonia

Question 1303. The pressure at the outlet of a refrigerant compressor is called

Discharge pressure
Suction pressure
Critical pressure
Back pressure

Discuss Question

Answer: Option A. -> Discharge pressure

Question 1304. The coefficient of performance of Electrolux refrigerator is the ratio of

Heat supplied by the gas burner minus the heat absorbed by the evaporator to the heat supplied by the gas burner
Heat supplied by the gas burner to the heat absorbed by the evaporator
Heat absorbed by the evaporator to the heat supplied by the gas burner
Heat absorbed by the evaporator minus the heat supplied by the gas burner to the heat absorbed by the evaporator

Discuss Question

Answer: Option C. -> Heat absorbed by the evaporator to the heat supplied by the gas burner

Question 1305. In a saturated air-water vapour mixture, the

Dry bulb, wet bulb and dew point temperature are same
Dry bulb temperature is higher than dew point temperature
Dry bulb temperature is higher than wet bulb temperature
Dew point temperature is lower than wet bulb temperature

Discuss Question

Answer: Option A. -> Dry bulb, wet bulb and dew point temperature are same

Question 1306. One of the purposes of sub cooling the liquid refrigerant is to

Ensure that only liquid and not the vapour enters the expansion (throttling) valve
Increase cooling effect
Reduce compressor overheating
Reduce compressor discharge temperature

Discuss Question

Answer: Option A. -> Ensure that only liquid and not the vapour enters the expansion (throttling) valve

Question 1307. The refrigerant for a refrigerator should have

Low latent heat
High latent heat
High total heat
High sensible heat

Discuss Question

Answer: Option B. -> High latent heat

Question 1308. It is desired to condition the outside air from 70% relative humidity and 45° C dry bulb temperature to 50% relative humidity and 25° C dry bulb temperature (room condition). The practical arrangement will be