CFPS

Review 99 CFPS practice questions with answer explanations and community insights.

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?

  1. 35 in2 (226 cm2)
  2. 40 in2 (258 cm2)
  3. 45 in2 (290 cm2)
  4. 50 in2 (323 cm2)

Question 2

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?

  1. Less than 1/8 in. (3 mm)
  2. Between 1/8 and 1/4 in. (3 mm to 6.4 mm)
  3. Between 1/4 and 1/2 in. (6.4 mm to 12.7 mm)
  4. At least 1/2 in. (12.7 mm)

Question 3

The effectiveness of various chemical extinguishing agents can be categorized according to which characteristics:

  1. saponification, effective radius, radiation shielding, particle size
  2. cooling action, radiation shielding, smothering action, chain breaking reaction
  3. particle size, smothering action, saponification, radiation shielding
  4. toxicity, effective radius, chain breaking reaction, cooling action

Question 4

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?

  1. 1 dB
  2. 3 dB
  3. 5 dB
  4. 6 dB

Question 5

When vaporization of a solid occurs with chemical decomposition, it is known as:

  1. melting.
  2. sublimation.
  3. evaporation.
  4. pyrolysis.
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