Refrigeration and Air Conditioning A pressure gauge on the discharge side of a refrigerant compressor reads too high. The reasons will be Water temperature being high Dirty condenser surface All of these Lack of cooling water Water temperature being high Dirty condenser surface All of these Lack of cooling water ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning The change in evaporator temperature in a refrigeration cycle, as compared to change in condenser temperature, influences the value of C.O.P. Less More Unpredictable Equally Less More Unpredictable Equally ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning 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) 100 kJ/kg 125 kJ/kg 25 kJ/kg 50 kJ/kg 100 kJ/kg 125 kJ/kg 25 kJ/kg 50 kJ/kg ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning In actual air-conditioning applications for R-12 and R-22, and operating at a condenser temperature of 40° C and an evaporator temperature of 5° C, the heat rejection factor is about 2.15 1.25 5.12 1 2.15 1.25 5.12 1 ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Most air cooled condensers are designed to operate with a temperature difference of 8°C 14°C 22°C 5°C 8°C 14°C 22°C 5°C ANSWER DOWNLOAD EXAMIANS APP
Refrigeration and Air Conditioning Which of the following refrigerant has the lowest freezing point? R-12 R-22 R-11 Ammonia R-12 R-22 R-11 Ammonia ANSWER DOWNLOAD EXAMIANS APP
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