If a gas has an absolute pressure of 319 kpa. it gage pressure is a) 419kpa b)219 kpa c) 439 kpa d)199 kpa

6–43 a food department is kept at 2128c by a refrigerator in an environment at 308c. the total heat gain to the food department is estimated to be 3300 kj/h and the heat rejection in the condenser is 4800 kj/h. determine the power input to the compressor, in kw and the cop of the refrigerator.