Asphyxia is generally limited to enclosed spaces, and... - USCG Deck General

Asphyxia is generally limited to enclosed spaces, and the deficiency of breathable air in an enclosed space can occur with any of the following conditions. Indicate the condition that will NOT cause asphyxia.

A When 21% of oxygen is present.

B Where large quantities of inert gas is present.

C When large quantities of cargo vapor is present

D Where rusting of internal tank surfaces has taken place.

AI Explanation

The correct answer is A) When 21% of oxygen is present. Asphyxia is generally caused by a deficiency of breathable air, specifically a lack of oxygen. Normal atmospheric air contains approximately 21% oxygen. As long as the oxygen concentration remains at 21%, asphyxia will not occur, even in an enclosed space. The other conditions listed, such as the presence of inert gases, cargo vapors, or rusting surfaces, can displace or consume oxygen, leading to an asphyxiating atmosphere. Therefore, option A is the correct answer, as 21% oxygen is sufficient to prevent asphyxia.

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Question 1417 Deck General

Asphyxia is generally limited to enclosed spaces, and the deficiency of breathable air in an enclosed space can occur with any of the following conditions. Indicate the condition that will NOT cause asphyxia.

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