When does auxiliary burner of incinerator put into operation? （）Ⅰ. start incinerator when it is coldⅡ. the sludge for dealing with is littleⅢ. the sludge for dealing with is largeⅣ. the water and impurity in sludge are too muchⅤ. the temperature in incinerator is lowⅥ. dealing with little solid rubbish

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

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

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

During the diesel engine running, the water level of F.W expansion tank should normally kept in the （） level of glass tube.

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

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

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.

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

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