The accumulation of air and other non-condensable gases in a refrigeration system will ().
A、cause a loss of the liquid seal
B、create a vapor lock in the liquid receiver
C、collect in the condenser
D、cause foaming of the oil in the crankcase
A、cause a loss of the liquid seal
B、create a vapor lock in the liquid receiver
C、collect in the condenser
D、cause foaming of the oil in the crankcase
A、A.causing moisture to accumulate against the bulkhead B、B.lowering the vapor pressure of the commodity C、C.lowering the dew point of the air D、D.raising the vapor pressure of the commodity
A、drain the accumulators and purge with oxygen B、bleed off all stored energy from the accumulators completely C、charge the accumulators to prevent system energy loss D、pump the hydraulic fluid into the accumulators to prevent fluid loss
A、A.causing moisture to accumulate against bulkhead B、B.lowering the vapor pressure of the commodity C、C.lowering the dew point of the air D、D.raising the vapor pressure of the commodity
A、Keeps the refrigerated space cooler B、Reduces the efficiency of the plant C、Takes the load off the compressor D、Has no affect on the system
A、accumulation of carbon dioxide gas that chokes the battery B、accumulation of explosive and toxic gases the battery can generate C、mildew or dry rot in the battery box D、battery failure including battery case meltdown caused by excessive heat
A、decrease the velocity of gases flowing past the tubes B、increase the rate of heat transfer C、reduce accumulations carbon deposits D、direct the flow of gases
A、the crankcase explosion B、lifting of the cylinder safety valve C、a scavenge fire D、opening of the manhole
A、A.the accumulation of explosive gases B、B.faster cooling of the fire C、C.the fire to spread through the ventilation system D、D.fixed foam systems to be ineffective
A、A.accumulation of carbon dioxide gas that chokes the battery B、B.accumulation of explosive and toxic gases the battery can generate C、C.mildew or dry rot in the battery box D、D.battery failure including battery case meltdown caused by excessive heat