Practice question

NFPA 1901 drafting/priming time for 1250 GPM pumps: 30 sec.

  1. 30 sec for 1250 GPM pumps
  2. 20 sec for 1000 GPM pumps
  3. 45 sec for 1500 GPM pumps
  4. 60 sec for 2000 GPM pumps

Answer: A — 30 sec for 1250 GPM pumps

NFPA 1901 sets standardized drafting/priming times to ensure a pumper can quickly become operational when drafting from a water source. For a pump rated at 1250 GPM, the required priming time is 30 seconds. This makes 30 seconds the correct standard for this scenario, as it directly matches the pump’s rated capacity. The other times correspond to different pump capacities and do not meet the NFPA requirement for a 1250 GPM unit. In practice, you prime by ensuring the suction line is filled, air is removed, and water begins flowing within that 30-second window, confirming the pump is ready.

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