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

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

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

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

（） is not installed on the main switchboar.

One of the reasons that cause oil flowed from sludge outlet of a self-cleaning separator is（）

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

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

Cold weather starting of a diesel engine may be made easier by（）

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