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

Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?（）

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

To proceed to the assistance of a ship in distress is（）

For a given exhaust gas boiler, what is the quantity of its evaporation mainly determined?（）

（）connectors hold best if a wire is accidentally pulled or a connection becomes loose.

If two A.C.generators are to be operated in parallel, the load is distributed evenly by（）

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

The condensers located in various stages of a flash evaporator are cooled by（）