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

A purge recovery system is used in a centrifugal air conditioning or refrigeration system 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

By comparing the exhaust gas temperature of each cylinder, the operator can determine if the load is balanced throughout the engine. The device most commonly used is a（）

Using a file without a handle may result in （）

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

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

The cetane rating of diesel fuel is an indication of the （）

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

The shipboard oil pollution emergency plan will be invalid after （）