Which of the following items don’t belong to dock repair works?（）

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

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

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

Using a file without a handle may result in （）

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

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

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

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

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