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

The Port State Control officer may witness a fire drill carried out by the crew assigned to these duties on the（）

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

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

Which of the diesel engine components listed increase air density and helps to improve engine operating efficiency?（）

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

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

Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?（）

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

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