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

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

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

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

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

Diesel engine air start system check valves are opened by （）

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

A purge recovery system is used in a centrifugal air conditioning or refrigeration system to （）

The Port State Control officer may witness a fire drill carried out by the crew assigned to these duties on the（）

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