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

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

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

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

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

Which of the listed governor characteristics will greatly affect the load sharing relationship between paralleled diesel generators?（）

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

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

Using a file without a handle may result in （）

Flame failure in an automatically fired auxiliary boiler can from a/an （）