Using a file without a handle may result in （）

By comparing the exhaust gas temperature of each cylinder, the operator can determine if the load is balanced throughout the engine. The device most commonly used is a（）

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

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

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

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

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

The flash point of a residual fuel oil should be used to determine the highest temperature to which oil may be heated（）

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

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