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

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

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（）

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

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

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

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

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

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

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