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

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

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

Using a file without a handle may result in （）

If two A.C.generators are to be operated in parallel, the load is distributed evenly by（）

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

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?（）

During the diesel engine running, the water level of F.W expansion tank should normally kept in the （） level of glass tube.