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.

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

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

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

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

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

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

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（）

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（）