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（）

（） is not installed on the main switchboar.

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

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

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

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

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

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

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

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