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

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.

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

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

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

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

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

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

By comparing the exhaust gas temperature of each cylinder, the operator can determine if the load is balanced throughout the engine. The device most commonly used is a（）