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

One of the reasons that cause oil flowed from sludge outlet of a self-cleaning separator is（）

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

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

The treatment of the fuel oils involves storage, heating, filtering and（）

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

Cold weather starting of a diesel engine may be made easier by（）

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

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

（） is not installed on the main switchboar.