A.higher torque but lower brake horsepower
B.lower torque but higher brake horsepower
C.higher torque and lower brake horsepower
D.lower torque and higher brake horsepower
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A.reduce the wear of bearing surfaces
B.cool the bearing surfaces
C.assist in sealing bearing surfaces
D.all of the above
A.Non-harmonic speed
B.Critical speed
C.Maximum speed
D.Design maximum speed
A dirty fuel oil filter is can be detected by （）
Ⅰ.fuel oil analysis
Ⅱ.observing the pressure drop across the filter
A.Ⅰonly
B.Ⅱonly
C.eitherⅠorⅡ
D.neitherⅠnor
A.increase the density of the intake air
B.decrease turbocharger power usage
C.reduce exhaust gas temperature
D.compensate for turbocharger PRM fluctuations
A.high oil pressure
B.excessive bearing end play
C.plugged oil control rings
D.engine overload
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The treatment of the fuel oils involves storage, heating, filtering and（）
The shipboard oil pollution emergency plan will be invalid after （）
The main purpose of port State control is not to（）
Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?（）
For a given exhaust gas boiler, what is the quantity of its evaporation mainly determined?（）
Using a file without a handle may result in （）
If two A.C.generators are to be operated in parallel, the load is distributed evenly by（）
When does auxiliary burner of incinerator put into operation? （）Ⅰ. start incinerator when it is coldⅡ. the sludge for dealing with is littleⅢ. the sludge for dealing with is largeⅣ. the water and impurity in sludge are too muchⅤ. the temperature in incinerator is lowⅥ. dealing with little solid rubbish
“Insufficiency of manning or insufficiency of certification of seafarers” is an identification of a（）
Under MARPOL Code the ship to which it applies has to carry （）