Which system type will not provide adequate protection for stockpiles of contents with moderate release rates when stockpiles are 10 inches high?

Which system type will not provide adequate protection for stockpiles of contents with moderate release rates when stockpiles are 10 inches high?

• A. Light hazard
• B. Ordinary hazard group 1
• C. Ordinary hazard group 2
• D. Extra hazard

Answer: (B)

The main idea here is that protection levels rise with how hazardous the storage is and how much fuel is piled up. When stockpiles are higher, or the contents have a moderate release rate, the fire growth potential is greater, so the sprinkler system must apply water at a higher rate to control a fire. For stockpiles that are 10 inches high with a moderate release rate, Ordinary Hazard Group 1 provides a lower design density than what’s needed. That means it won’t deliver enough water application to reliably control or suppress a fire in this scenario. Higher classifications, like Ordinary Hazard Group 2 or Extra Hazard, are designed to handle larger fuel loads and faster fire growth, so they would be more appropriate for these conditions. So, Ordinary Hazard Group 1 is the system type that will not provide adequate protection for these stockpiles.

The main idea here is that protection levels rise with how hazardous the storage is and how much fuel is piled up. When stockpiles are higher, or the contents have a moderate release rate, the fire growth potential is greater, so the sprinkler system must apply water at a higher rate to control a fire.

For stockpiles that are 10 inches high with a moderate release rate, Ordinary Hazard Group 1 provides a lower design density than what’s needed. That means it won’t deliver enough water application to reliably control or suppress a fire in this scenario. Higher classifications, like Ordinary Hazard Group 2 or Extra Hazard, are designed to handle larger fuel loads and faster fire growth, so they would be more appropriate for these conditions.

So, Ordinary Hazard Group 1 is the system type that will not provide adequate protection for these stockpiles.