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

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.

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（）

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

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

Diesel engine air start system check valves are opened by （）

Engine parameters shall be corresponded to NOx Technical Files. This is required by （）

（） is not installed on the main switchboar.