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

“Insufficiency of manning or insufficiency of certification of seafarers” is an identification of a（）

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

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

The condensers located in various stages of a flash evaporator are cooled by（）

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

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

Which one is NOT the ‘clear grounds’ for a more detailed inspection?（）

（） is not installed on the main switchboar.

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