A.lower
B.higher
C.low
D.high
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A.Water is heated into vapor on heating surfaces
B.Water is vaporized by pressure difference
C.There are no heating-transfer surfaces
D.There are more heating-transfer surfaces
A.high-pressure steam-driven air-ejector
B.motor-driven vacuum pump
C.water-motivated air eductor
D.centrifuge pump
A.condenser
B.flashing device
C.lashing device
D.vacuum pump
A.lower condensing
B.higher cooling
C.lower cooling
D.higher condensing
A.the oil feeding is stopped and replaced by admitting flushing water
B.the flushing water feeding is stopped and replaced by admitting oil
C.the feeding of dirty oil and flushing water is stopped
D.the feeding of dirty oil and flushing water is admitted
最新試題
Using a file without a handle may result in （）
（） is not installed on the main switchboar.
The condensers located in various stages of a flash evaporator are cooled by（）
Flame failure in an automatically fired auxiliary boiler can from a/an （）
The treatment of the fuel oils involves storage, heating, filtering and（）
Which of the following items don’t belong to dock repair works?（）
Which of the diesel engine components listed increase air density and helps to improve engine operating efficiency?（）
When does auxiliary burner of incinerator put into operation? （）Ⅰ. start incinerator when it is coldⅡ. the sludge for dealing with is littleⅢ. the sludge for dealing with is largeⅣ. the water and impurity in sludge are too muchⅤ. the temperature in incinerator is lowⅥ. dealing with little solid rubbish
The ISPS Code consists of a mandatory section-Part A, which shows（）
Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?（）