The flash point of a residual fuel oil should be used to determine the highest temperature to which oil may be heated（）

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.

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

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

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（）

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

The shipboard oil pollution emergency plan will be invalid after （）

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

For a given exhaust gas boiler, what is the quantity of its evaporation mainly determined?（）