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.

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

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

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

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

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

（） is not installed on the main switchboar.

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

Engine parameters shall be corresponded to NOx Technical Files. This is required by （）