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

Which one is NOT the ‘clear grounds’ for a more detailed inspection?（）

Using a file without a handle may result in （）

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.

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

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

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

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

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