（）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（）

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

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

Which of the diesel engine components listed increase air density and helps to improve engine operating efficiency?（）

A purge recovery system is used in a centrifugal air conditioning or refrigeration system to （）

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

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

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