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

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

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

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

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

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

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

One of the reasons that cause oil flowed from sludge outlet of a self-cleaning separator is（）

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

（）are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.