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

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

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

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

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

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

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

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

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

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