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

单项选择题 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.

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