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

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

Flame failure in an automatically fired auxiliary boiler can from a/an （）

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（）

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

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

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

（） is not installed on the main switchboar.

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

Using a file without a handle may result in （）