A、a separate air ejector unit
B、a direct unimpeded connection between second stage and salt water feed heater
C、either by vacuum drag or an external line from the first stage via a fixed orifice
D、the fixed orifice provided in the steam supply line
更多“The vacuum maintained in the salt water feed heater shell of a flash-type evaporator is generally accomplished by （）.”相关的问题
A、Regulation of discharge pressure from cargo pumps B、Maintaining constant velocity in cargo lines C、Regulation of suction head on cargo pumps D、To maintain a tank or void at atmospheric pressure
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
A、A. Sailors often maintain the derrick. B、B. Sailors often maintain the winch. C、C. Sailors often maintain the windlass. D、D.Sailors often maintain the machine.
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、scavenging action of the piston B、piston type vacuum pump taking suction off a differential manometer C、gland exhausting manometer D、crankcase exhaust fan
A、The index is not used by the optimizer but is maintained during DML operations. B、The index is not used by the optimizer and is not maintained during DML operations. C、The index is used by the optimizer only if a hint is specified in the query statement and is maintained during DML operations. D、The index is used by the optimizer only if a hint is specified in the query statement but is not maintained during DML operations.
A、the absolute pressure B、the gauge pressure C、the vacuum pressure D、the differential pressure
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