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

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

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

Using a file without a handle may result in （）

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

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

To shut down a diesel engine after it exceeds the set maximum speed，which type of device listed should be used?（）

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

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

Flame failure in an automatically fired auxiliary boiler can from a/an （）