Military and some college campuses require mass notification alongside fire alarm systems. What manufacturers have dual 'fire alarm' and 'alert' strobes in one appliance? Is Simplex the only one?
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A forensic investigator is trying to determine approximate timing of events after a fire within a hospital basement. A quick response sprinkler (RTI of 50 m^1/2s^1/2), Ordinary Temperature (65 deg C) was within a room (2.2 m high ceiling) that has an initial temperature of 70 deg F and was exposed to a ceiling plume at 190 deg F traveling at 2.3 m/s. Approximately how long should it have taken the sprinkler to activate? a. 1 seconds b. 15 seconds c. 23 seconds d. 35 seconds Solution | Posted 06/11/18
A project has restroom stall walls that run floor to ceiling. There are gaps above and below the door for venting. Are strobes required in each stall? Audibility would be provided with a combination horn/strobe in the main restrooms space.
Note: This is a Daily Discussion question submitted anonymously to us. Submit a Question or Discuss This Here. For duct smoke detector functionality testing, is there guidelines to use either aerosol spray, smoke bomb, or magnet? Which are acceptable method(s)?
Note: This is a Daily Discussion question submitted anonymously to us. Submit a Question or Discuss This Here. NFPA 72 (2016) Edition 10.4.1 states that all systems "are to be installed in accordance with plans approved by the AHJ." When designing your fire alarm system, what do you frequently coordinate with the AHJ? If you're an AHJ, what questions are you commonly asked from fire alarm designers?
Note: This is a Daily Discussion question submitted anonymously to us. Submit a Question or Discuss This Here. Is there an easy way to recognize the fire alarm circuit class: A, B, C, D, E, N, or X? That is, is there a way to determine the class, just by looking at the diagram or plan of the circuit?
Note: This is a question submitted anonymously to us (you can submit any question here) as part of our new Daily Discussion series. Discuss this question here. |
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