A.Sodium hydroxide
B.Sodium carbonate
C.Sodium nitrate
D.Sodium polyphosphate
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A.expand
B.extract
C.increase
D.decrease
A.escapes
B.overheats
C.expands
D.accelerates
A.be interrupted
B.move downwards
C.move outwards
D.retain original position
A.Height of the machine
B.Temperature of the liquid seal
C.Gravity disc
D.Bowl diameter
A.Accidental discharge of oil
B.Disposal of oil residues
C.Quantity of water produced by FWG
D.Discharge of dirty ballast or cleaning water from fuel oil tanks
最新試題
When a refrigeration compressor has developed a high head pressure as a result of a refrigerant overcharge, you should （）.
A salinity indicator is used to determine the （）.
Low compressor head pressure in a refrigeration system can be caused by（）.
An excessive charge of refrigerant in an air-cooled refrigeration system can cause （）.
If the relief valve on the discharge side of a hydraulic pump lifts, the cause could be （）.
If the viscosity of the liquid being transferred remains constant as the discharge pressure increases, the rotary pump （）.
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 （）.
Which of the following statements is correct concerning heat transfer?（）
A grease gun is generally used to lubricate a （）.