A、vacuum drag from the auxiliary condensate system
B、individual vacuum pumps
C、a single non-condensing air ejector
D、a two stage air ejector
更多“A vacuum is initially established in the first and second stages of a low pressure evaporator by the use of （）”相关的问题
A、Sea water is heated to boiling temperature under a vacuum B、Sea water is passed over heated plates in a thin film C、Heated sea water is injected into a vacuum chamber D、Sea water is forced through a heated eductor
A、Sea water is heated to boiling temperature while under a vacuum B、Sea water is passed over heated plates in a thin film C、Heated sea water is injected into a vacuum chamber D、Sea water is forced through a heated eductor
A、the flashing of the feed water B、the condensation of the saltwater feed C、air ejectors, eductors, or a separate vacuum pump D、condensation of the distillate
A、the saturation temperature is higher B、the higher the saturation temperature C、the higher is the saturation temperature D、the saturation temperature is more high
A、The wearing rings are excessively worn B、The suction strainer is clogged C、The discharge valve is clogged D、The shaft is worn
A、temperature and pressure B、humidity and temperature C、pressure and vacuum D、pressure and humidity
A、They are designed to provide for the flow of small volumes of tank atmospheres caused by thermal variations in a cargo tank B、They should operate in advance of the pressure/vacuum breakers C、They should be kept in good working order by regular inspection and cleaning D、All of the above
A、the circuit breaker B、for leaks in the suction piping C、relief valve is not properly seated D、the suction strainer
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