A.examine the condition of the propeller
B.chip and paint all hull protection zincs
C.install new docking plugs in all cofferdams
D.inspect the hull for hogging or sagging
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A.the suction and discharge valves
B.tools and equipment served by compressed air
C.air line reducing valves
D.all of the above
A.Moisture separator
B.Vacuum breaker
C.Lubricator
D.Non-return valve
A.rate of doing work
B.amount of force needed to overcome friction
C.amount of work accomplished
D.distance through which an object is moved
A.re-adjust the discharge pressure
B.clean the expansion valve screen
C.add refrigerant
D.adjust the expansion valve
A.splash method
B.mechanical force feed lubricators
C.detached sump method
D.internal cooling passages in the crankshafts and connecting rods
最新試題
A grease gun is generally used to lubricate a （）.
When the steering gear is in operation, you should （）.
Low compressor head pressure in a refrigeration system can be caused by（）.
The output volume of a positive fixed displacement pump can be changed only by （）.
A pressure drop through the refrigerant liquid line may cause （）.
Who is responsible for ensuring that someone is assigned to close the watertight doors in an emergency?（）
If the viscosity of the liquid being transferred remains constant as the discharge pressure increases, the rotary pump （）.
The usual symptoms of cavitation in a centrifugal pump is （）.
A salinity indicator is used to determine the （）.
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?（）