A.a needle gun
B.soap and water
C.a wire brush
D.a chipping hammer
您可能感興趣的試卷
你可能感興趣的試題
A.Hydrochloric acid
B.Chlorine
C.Sulfuric acid
D.Zinc chromate
A.absolute humidity
B.relative humidity
C.specific humidity
D.total humidity
A.excessive pump speed
B.excessive suction head
C.worn wearing rings
D.gross pump misalignment
A.Distillation is the process of boiling seawater to produce vapor which is condensed into fresh water
B.Evaporation is the second part of the distillation process where brine is removed
C.Brine is the result of condensed sea water vapor
D.Distillate is the product resulting from the evaporation of fresh water vapor
A.absolute humidity
B.specific humidity
C.effective humidity
D.relative humidity
最新試題
Which of the following statements is correct concerning heat transfer?（）
If the thermal bulb of an expansion valve is incorrectly placed at the center of the coil instead of the end, it will （）.
A salinity indicator is used to determine the （）.
The output volume of a positive fixed displacement pump can be changed only by （）.
When the steering gear is in operation, you should （）.
A pressure drop through the refrigerant liquid line may cause （）.
An increasing head pressure in a refrigeration system, without any corresponding change in the cooling water inlet temperature, would probably be caused by （）.
Which of the following problems could cause the high pressure cutout switch to shut down the compressor in a refrigeration system?（）
An internal bypass is provided on some hydraulic system suction strainers to help reduce the possibility of （）.
If the head pressure of a reciprocating refrigeration compressor is excessive, （）.