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.

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

“Insufficiency of manning or insufficiency of certification of seafarers” is an identification of a（）

The treatment of the fuel oils involves storage, heating, filtering and（）

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

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

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（）

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

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