A.have a high viscosity index
B.mix readily with refrigerant
C.have a high freezing point
D.have a low pour point
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A.low wax content
B.high pour point
C.high viscosity
D.all of the above
A.fuel oil pump will over-speed if dirt is not removed
B.fuel oil transfer pumps cannot tolerate small amounts of grit in the oil
C.fuel injectors may be damaged by foreign particles in the fuel oil dirty
D.fuel will clog the intake air filter
A.The viscosity off the fuel
B.The quantity of water to be removed from the fuel
C.The specific gravity of the fuel
D.The quantity of dirt to be removed from the fuel
A.oil has a tendency to emulsify in the bowl
B.purifier will act as a clarifier at the discharge ring
C.oil will be lost through the water discharge ports
D.oil solids will be deposited only at the intermediate top disk
A.more sealing water is needed
B.the cover clamp needs tightening
C.the purifier has a bad vibration when started
D.water is discharged from the overflow line
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As soon as a diesel engine has started, which of the listed engine operating parameters should be checked FIRST?（）
Diesel engine air start system check valves are opened by （）
Thermostatic steam pressure reducing valves are used in the fuel oil service system to control the（）
（）are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.
If two A.C.generators are to be operated in parallel, the load is distributed evenly by（）
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Using a file without a handle may result in （）
To proceed to the assistance of a ship in distress is（）
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During the diesel engine running, the water level of F.W expansion tank should normally kept in the （） level of glass tube.