A.Sodium hydroxide
B.Sodium carbonate
C.Sodium nitrate
D.Sodium polyphosphate
您可能感興趣的試卷
你可能感興趣的試題
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
A salinity indicator is used to determine the （）.
The output volume of a positive fixed displacement pump can be changed only by （）.
An excessive charge of refrigerant in an air-cooled refrigeration system can cause （）.
The amount of fluid friction or internal friction inherent in a mineral lubricating oil is reflected as a measure of its （）.
If you are given the job of adding hydraulic fluid to a mooring winch, and are not certain as to the type of fluid to use, you should （）.
When the steering gear is in operation, you should （）.
If the viscosity of the liquid being transferred remains constant as the discharge pressure increases, the rotary pump （）.
Pitting in the suction areas of a centrifugal pump bronze impeller is usually caused by （）.
An increasing head pressure in a refrigeration system, without any corresponding change in the cooling water inlet temperature, would probably be caused by （）.
If the relief valve on the discharge side of a hydraulic pump lifts, the cause could be （）.