Flame failure in an automatically fired auxiliary boiler can from a/an （）

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

As soon as a diesel engine has started, which of the listed engine operating parameters should be checked FIRST?（）

“Insufficiency of manning or insufficiency of certification of seafarers” is an identification of a（）

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

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

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

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

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