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

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

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

The condensers located in various stages of a flash evaporator are cooled by（）

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

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

For a given exhaust gas boiler, what is the quantity of its evaporation mainly determined?（）

（） is not installed on the main switchboar.

The additional mark （）in the Classification Certificate for Machinery means propulsion apparatus is remotely controlled on the navigating bridge control station, and engine assembly control station is unmanned periodically.

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（）