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.

The main purpose of port State control is not to（）

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

（）are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.

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

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

As soon as a diesel engine has started, which of the listed engine operating parameters should be checked FIRST?（）

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

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

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