If separating effect is not good, which measure should be taken （）

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

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

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

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

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（）

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

“Insufficiency of manning or insufficiency of certification of seafarers” is an identification of a（）

Using a file without a handle may result in （）

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