Certified Fire Protection Specialist (CFPS) — Question 1

It was determined that a total-flooding carbon dioxide suppression system installed in a process room requires an overpressurization vent. The system will flow 156 pounds of carbon dioxide per minute, and the enclosure strength has been calculated to be 9 lb/ft2 (71 kg). What is the minimum vent size recommended for this application?

Answer options

• A. 35 in2 (226 cm2)
• B. 40 in2 (258 cm2)
• C. 45 in2 (290 cm2)
• D. 50 in2 (323 cm2)

Correct answer: C

Explanation

The correct answer is C because the vent size must be adequate to handle the flow of carbon dioxide without exceeding the enclosure strength. Options A, B, and D do not provide sufficient venting capacity based on the required calculations for this specific application.