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

If two A.C.generators are to be operated in parallel, the load is distributed evenly by（）

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

The Port State Control officer may witness a fire drill carried out by the crew assigned to these duties on the（）

To shut down a diesel engine after it exceeds the set maximum speed，which type of device listed should be used?（）

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

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

The ISPS Code consists of a mandatory section-Part A, which shows（）

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

To proceed to the assistance of a ship in distress is（）