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

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

The main purpose of port State control is not to（）

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

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

（）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（）

Engine parameters shall be corresponded to NOx Technical Files. This is required by （）

（） is not installed on the main switchboar.

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