Dry system design includes a ______ percent increase in area of operation.

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Multiple Choice

Dry system design includes a ______ percent increase in area of operation.

Explanation:
When a dry pipe system is designed, the air-filled piping causes a delay before water reaches the sprinklers. To maintain the intended level of protection despite that delay, the area of operation is increased by 30 percent. This adjustment ensures the system still meets performance criteria for the protected area. Underestimating the increase (like 25 percent) would risk inadequate coverage, while larger increases (40 or 50 percent) would overcompensate and aren't standard practice.

When a dry pipe system is designed, the air-filled piping causes a delay before water reaches the sprinklers. To maintain the intended level of protection despite that delay, the area of operation is increased by 30 percent. This adjustment ensures the system still meets performance criteria for the protected area. Underestimating the increase (like 25 percent) would risk inadequate coverage, while larger increases (40 or 50 percent) would overcompensate and aren't standard practice.

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