A.The compressed air
B.The compressing air
C.The transfer pump
D.The head tank
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A.reciprocating
B.diffuser
C.turbine
D.vane
A.lower than
B.higher than
C.below
D.equal to
A.fire-tubes
B.furnaces
C.down-comers
D.soot-blowers
A.The domestic water
B.Bilge water
C.Oil transfer
D.The ballast
A.A cut-off lever
B.A swivel block
C.A cross-head
D.A driving gear
最新試題
Low compressor head pressure in a refrigeration system can be caused by（）.
On tank vessels equipped with power operated cargo tank valves, the type of power operator most commonly used is （）.
A pressure drop through the refrigerant liquid line may cause （）.
The rate of heat transfer from a hot region to a cold region is affected most by the （）.
An excessive charge of refrigerant in an air-cooled refrigeration system can cause （）.
Thermostatic expansion valves can be adjusted for （）.
If the thermal bulb of an expansion valve is incorrectly placed at the center of the coil instead of the end, it will （）.
Pitting in the suction areas of a centrifugal pump bronze impeller is usually caused by （）.
Heavy wear in a particular area of the inner circumference of a packing ring may be caused by （）.
A grease gun is generally used to lubricate a （）.