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

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

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

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

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

The main purpose of port State control is not to（）

Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?（）

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

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

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