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

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

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

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

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

Engine parameters shall be corresponded to NOx Technical Files. This is required by （）

（）connectors hold best if a wire is accidentally pulled or a connection becomes loose.

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（）

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