Sweating of the refrigeration system compressor crankcase is caused by ().
A、too much superheat
B、insufficient superheat
C、suction pressure too low
D、excessive refrigerant returning to the compressor
A、too much superheat
B、insufficient superheat
C、suction pressure too low
D、excessive refrigerant returning to the compressor
A、a shortage of refrigerant in the system B、air in the system C、an accumulation of liquid refrigerant in the crankcase D、a shortage of oil in the crankcase
A、insufficient lube oil circulating through the system B、excessive circulation of lube oil through the system C、insufficient refrigerant in the system D、an overworked compressor
A、a shortage of refrigerant B、the compressor running continuously C、liquid refrigerant returning to the compressor D、the compressor short cycling on the high pressure cutout
A、Dilated pupils and shallow breathing B、Diarrhea and frequent urination C、Muscle tenseness in almost the entire abdomen D、Extreme sweating and reddening skin
A、add refrigerant to the system B、adjust the thermal expansion valve to the proper setting C、adjust the float valve to the proper holding pressure D、open the hand expansion valve
A、a stuck solenoid valve B、a shortage of refrigerant C、too much oil in circulation D、too much superheat
A、the raising of the standards of teaching and the reform in curriculum B、the raising of the standards of teaching and learning and the restructuring of the schools C、the raising of the standards of teaching and the improvement of the standards of learning D、None of the above
A、volume of liquid in the tank B、volume of displacement of the vessel C、location of the tank in the vessel D、height of the center of gravity of the vessel
A、centerline of the pump and the level of the liquid in the suction well when the source of liquid is below the pump B、centerline of the pump and the suction liquid level when the source of liquid is above the pump C、centerline of the pump and the level of the discharge liquid D、liquid levels of the suction and discharge