If a refrigeration compressor is short cycling on high head pressure, you should

A．purge the condenser if the waterside is dirty

B．check for proper water flow through the condenser

C．increase the high pressure cutout setting

D．reduce the cooling water flow

[单选题]If a refrigeration compressor is short cycling on high head pressure, you should _______.A．purge the condenser if the waterside is dirtyB．check for proper water flow through the condenserC．increase the high pressure cutout settingD．reduce the cooling

[单选题]If the refrigeration compressor crankcase is sweating, the cause may be due toA．a shortage of refrigerantB．the compressor running continuouslyC．liquid refrigerant returning to the compressorD．the compressor short cycling on the high pressure cutout

[单选题]If a refrigeration system were short of refrigerant, the condition would result inA．continuous running of the compressorB．high suction pressureC．high discharge pressureD．short cycling of the compressor on the water failure switch

[单选题]In the refrigeration system, a shortage of refrigerant is indicated byA．the compressor short cycling on high pressure cut out switchB．high suction pressureC．high head pressureD．bubbles in the sight glass

[单选题]If a reciprocating air compressor has a knock occurring in frequency with its operating RPM, the cause is probably _____.A．misalignment or worn main bearingsB．insufficient cylinder lubricationC．defective or poorly fitted valvesD．All of the above

[单选题]Moisture is removed from a refrigeration system byA．bleeding refrigerant from the condenserB．opening a drain petcock on the oil separatorC．condensing the water in the heat exchangerD．using a dehydrator cartridge

[单选题]Sweating of the refrigeration system compressor crankcase is caused by_______ .A．too much superheatB．insufficient superheatC．suction pressure too lowD．excessive refrigerant returning to the compressor

[单选题]When the refrigeration demand is small,_______.A．the expansion valve will move toward the wide open positionB．the expansion valve will move toward the closing positionC．the feeler bulb will conveys the high temperatureD．the superheat degree will rais

[单选题]A． caseB． shortC． turnD． essence

[单选题]Low compressor head pressure in a refrigeration system can be caused by ___.A．insufficient condenser cooling waterB．excessive condenser cooling waterC．air in the refrigeration systemD．excessive refrigerant in the system