The Port State Control officer may witness a fire drill carried out by the crew assigned to these duties on the（）

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

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

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

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

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

For a given exhaust gas boiler, what is the quantity of its evaporation mainly determined?（）

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

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

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