A.lower than
B.higher than
C.as much as
D.the same as
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A.overboard
B.a bilge well
C.a slop tank
D.a hot well
A.by trial and error
B.by and large
C.automatically
D.very easily
A.catch plates
B.dampers
C.regulating valves
D.fans
A.few
B.little
C.a little
D.less
A.pressure
B.temperature
C.density
D.volume
最新試題
If the relief valve on the discharge side of a hydraulic pump lifts, the cause could be （）.
The control mode in which the final control element is moved from one of two flexed positions to the other is known as （）.
The rate of heat transfer from a hot region to a cold region is affected most by the （）.
The amount of fluid friction or internal friction inherent in a mineral lubricating oil is reflected as a measure of its （）.
The major source of chemical contaminants in hydraulic fluid is （）.
If the viscosity of the liquid being transferred remains constant as the discharge pressure increases, the rotary pump （）.
Low compressor head pressure in a refrigeration system can be caused by（）.
A grease gun is generally used to lubricate a （）.
When the steering gear is in operation, you should （）.
Which of the following statements is correct concerning heat transfer?（）