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

As soon as a diesel engine has started, which of the listed engine operating parameters should be checked FIRST?（）

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

Using a file without a handle may result in （）

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

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

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

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.

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

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