Using a file without a handle may result in （）

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（）

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

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

Which of the diesel engine components listed increase air density and helps to improve engine operating efficiency?（）

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

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

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

（） is not installed on the main switchboar.