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

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

The ISPS Code consists of a mandatory section-Part A, which shows（）

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

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

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

Which of the following items don’t belong to dock repair works?（）

The cetane rating of diesel fuel is an indication of the （）

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

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