The ship security officer shall have knowledge and have received training, taking into account the guidance given in Part B of______.

（轮机日志）22时30分，废气锅炉上、下排污，23时，废气锅炉用化学药剂吹灰。

（修理单）NO.2重油分油机解体检修，所有密封O形圈、轴承换新。

According to this passage, which of the following statements is true?

At the middle pressure and large air quantity,_________ is more suitable.

题干材料：Due to the large amount of heat picked up by the air in boiler and engine rooms, it would be impracticable to maintain ambient conditions within the comfort zone by air conditioning or any other means. The normal practice is to provide copious mechanical ventilation; in boiler rooms, the quantity is equated to the combustion requirements, while in a motor ship engine room the supply may be 25-50% in excess of the requirements of the engines. 

The axial flow fan is particularly suited to handle these large air volumes at the moderate pressures required, while of course the “straight-through” flow feature places it at an advantage over the centrifugal fan.

The increasing adoption of automation, with the provision of a separate control room makes less significant the fact that comfort conditions cannot be maintained in the engine room all the time. 

问题：Which of the following devices should be taken to maintain ambient conditions of the boiler and machinery space?

In a motor vessel, the air quantity which the engine room need is_______ of the requirements of the engines.

The ship security officer shall have knowledge and have received training, taking into account the guidance given in Part B of______.

______ means the Government of the State whose flag the ship is entitled to fly.

The SOLAS Convention in its successive forms is generally regarded as the most important of all international treaties concerning the ______of merchant ships.

In cleaning up an oil spill, the use of chemical agents would ______.