Upon activation of the fire-extinguishing system, makeup air supplied internally to a hood shall be what action?

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Study for the NFPA 96/17A Class K Test. Prepare with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Multiple Choice

Upon activation of the fire-extinguishing system, makeup air supplied internally to a hood shall be what action?

Explanation:
When the fire-extinguishing system in a kitchen hood is activated, the makeup air supply to the hood is shut off. This stops fresh air from entering the space, which would otherwise feed the fire with oxygen and dilute the extinguishing agent. By cutting off makeup air, you help contain the fire and maximize the effectiveness of the suppression system. Keeping makeup air on or increasing it would undermine suppression effort, and leaving it unchanged or redirecting it would not achieve the needed isolation of the hood during a discharge.

When the fire-extinguishing system in a kitchen hood is activated, the makeup air supply to the hood is shut off. This stops fresh air from entering the space, which would otherwise feed the fire with oxygen and dilute the extinguishing agent. By cutting off makeup air, you help contain the fire and maximize the effectiveness of the suppression system. Keeping makeup air on or increasing it would undermine suppression effort, and leaving it unchanged or redirecting it would not achieve the needed isolation of the hood during a discharge.

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