One of the reasons that cause oil flowed from sludge outlet of a self-cleaning separator is（）

Cold weather starting of a diesel engine may be made easier by（）

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

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

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

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

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.

Thermostatic steam pressure reducing valves are used in the fuel oil service system to control the（）

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

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