Red Seal Plumbing Practice Exam

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What is the minimum size of fire department connection (FD) in a building?

  1. 2" (50mm)

  2. 3" (75mm)

  3. 4" (100mm)

  4. 5" (125mm)

The correct answer is: 3" (75mm)

The minimum size for a fire department connection (FD) in a building is 3" (75mm). This is because a 3" diameter pipe can provide enough water flow and pressure for firefighters to effectively fight a fire. Options A, C, and D are incorrect because they are either smaller or larger than the required minimum size, which could result in insufficient water flow or pressure, making it difficult to extinguish a fire. Selecting option A may lead to inadequate water supply and coverage, while options C and D may be too large and expensive for the building.

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