A.upwards
B.downwards
C.outwards
D.forwards
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A.bowl periphery
B.bowl center
C.upper surface
D.lower surface
A.bowl periphery
B.bowl center
C.upper surface
D.lower surface
A.purifying
B.batch
C.long period
D.temporary
A.center
B.periphery
C.inlet
D.upper parts
A.an oily water separator
B.a purifier
C.a centrifugal compressor
D.a clarifier
最新試題
The general purpose of a heat exchanger is to （）.
When the steering gear is in operation, you should （）.
When a refrigeration compressor has developed a high head pressure as a result of a refrigerant overcharge, you should （）.
One cause of high head pressure occurring in a refrigeration system can be （）.
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?（）
A gradual decrease in the discharge pressure of an operating hydraulic pump can be caused by （）.
Thermostatic expansion valves can be adjusted for （）.
If the viscosity of the liquid being transferred remains constant as the discharge pressure increases, the rotary pump （）.
A pressure drop through the refrigerant liquid line may cause （）.
Who is responsible for ensuring that someone is assigned to close the watertight doors in an emergency?（）