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

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

The flash point of a residual fuel oil should be used to determine the highest temperature to which oil may be heated（）

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

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

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

The main purpose of port State control is not to（）

（）connectors hold best if a wire is accidentally pulled or a connection becomes loose.

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

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