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

Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?（）

Thermostatic steam pressure reducing valves are used in the fuel oil service system to control the（）

The additional mark （）in the Classification Certificate for Machinery means propulsion apparatus is remotely controlled on the navigating bridge control station, and engine assembly control station is unmanned periodically.

Under MARPOL Code the ship to which it applies has to carry （）

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

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 of the listed governor characteristics will greatly affect the load sharing relationship between paralleled diesel generators?（）

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

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