If separating effect is not good, which measure should be taken （）

As soon as a diesel engine has started, which of the listed engine operating parameters should be checked FIRST?（）

Thermostatic steam pressure reducing valves are used in the fuel oil service system to control the（）

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

Using a file without a handle may result in （）

During the diesel engine running, the water level of F.W expansion tank should normally kept in the （） level of glass tube.

（）are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.

Cold weather starting of a diesel engine may be made easier by（）

The Port State Control officer may witness a fire drill carried out by the crew assigned to these duties on the（）

The shipboard oil pollution emergency plan will be invalid after （）