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

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

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.

A purge recovery system is used in a centrifugal air conditioning or refrigeration system to （）

Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?（）

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

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

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

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.