It was determined that a total-flooding carbon dioxide suppression system installed in a process room requires an over pressurization 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(s): C
How much depth of particle-sized dusts of organic materials such as wood or food products can, under the right set of conditions, result in a flash fire or explosion?
Answer(s): D
The effectiveness of various chemical extinguishing agents can be categorized according to which characteristics:
Answer(s): B
The performance of fire alarm audible notification in a wide open space can be analyzed using a condition called free-field condition, where the sound pressure level (SPL) decreases roughly by a specific decibel value every time the distance from the source is doubled. Which of the following choices is the specific decibel value attributed to the free-field condition?
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Kagan Yavuz Commented on November 27, 2024 Q4 should be 6 db : As one gets closer, the SPL increases. In a wide-open space where the sound does not reflect off any surfaces (no reverberation), the SPL decreases by roughly 6 dB every time the distance from the source is doubled (NFPA FPH 14-30). Anonymous
Kagan Yavuz Commented on November 27, 2024 The answer of question 2 should be "B": Dusts of organic materials such as wood, food products, paper, and so on of the correct particle size with a depth of less than 1 /8 in. (3 mm) can, under the right set of conditions, result in a flash fire or explosion (see FPH pg 11-31) Anonymous
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