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

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

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

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

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

Engine parameters shall be corresponded to NOx Technical Files. This is required by （）

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

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

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.

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