Questions and answers for exam Preparation

MCQs

Total Questions : 1342 | Page 135 of 135 pages

Question 1341. A refrigerating system operating on reversed Brayton refrigeration cycle is used for maintaining 250 K. If the temperature at the end of constant pressure cooling is 300 K and rise in the temperature of air in the refrigerator is 50 K, then the net work of compression will be (assume air as working substance with Cp = 1 kJ/kg)

25 kJ/kg
125 kJ/kg
50 kJ/kg
100 kJ/kg

Discuss Question

Answer: Option C. -> 50 kJ/kg

Question 1342. The operating temperature of a cold storage is -2°C. The heat leakage from the surrounding is 30 kW for the ambient temperature of 40°C. The actual C.O.P. of refrigeration plant used is one fourth that of ideal plant working between the same temperatures. The power required to drive the plant is