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（）

The flash point of a residual fuel oil should be used to determine the highest temperature to which oil may be heated（）

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

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

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

Which of the following items don’t belong to dock repair works?（）

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

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