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

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

Under MARPOL Code the ship to which it applies has to carry （）

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

The additional mark （）in the Classification Certificate for Machinery means propulsion apparatus is remotely controlled on the navigating bridge control station, and engine assembly control station is unmanned periodically.

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

The shipboard oil pollution emergency plan will be invalid after （）

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

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

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