A.increase；reduce
B.reduce；increase
C.increase；increase
D.reduce；reduce
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A.instantaneous
B.instantaneously
C.simultaneous
D.simultaneously
A.An economizer
B.An attemperator
C.A water dram
D.A down-comer tube
A.cap
B.disc
C.tag
D.cover
A.open
B.close
C.opens
D.closes
A.welcome
B.admitted in some special sea areas
C.prohibited
D.acceptable
最新試題
The temperature differential occurring between the inlet temperature of the fluid to be cooled and the outlet temperature of the cooling medium in a shell-and-tube heat exchanger is greatest in which of the flow designs listed?（）
Low compressor head pressure in a refrigeration system can be caused by（）.
When the steering gear is in operation, you should （）.
A grease gun is generally used to lubricate a （）.
One cause of high head pressure occurring in a refrigeration system can be （）.
Which of the problems listed would came the discharge temperature of an R-12 refrigeration compressor to increase?（）
The general purpose of a heat exchanger is to （）.
A salinity indicator is used to determine the （）.
An internal bypass is provided on some hydraulic system suction strainers to help reduce the possibility of （）.
Who is responsible for ensuring that someone is assigned to close the watertight doors in an emergency?（）