Which of the following is not a classification of traps based on their shape? 

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BPSC AE Paper VI Civil 19 Dec 2024 Official Paper
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  1. P - trap
  2. W - trap
  3. S - trap
  4. Q - trap

Answer (Detailed Solution Below)

Option 2 : W - trap
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Explanation:

W - trap is not a classification of traps based on their shape.

RRB JE CE R 13 11Q Environmental Chapter Test 1 Part 3 Hindi - Final images nita Q5Additional InformationP - Trap

  • Named for its resemblance to the letter "P" in profile view.

  • Commonly installed under sinks and wash basins, especially when the outlet pipe goes through the wall.

  • Has a horizontal outflow, making it suitable for wall drainage systems.

  • Contains water at the bend to prevent sewer gases from entering the building.

  • Usually made of PVC, cast iron, or brass.

S - Trap

  • Shaped like the letter "S", designed for vertical installation.

  • Ideal for floor-mounted fixtures where the drain goes straight down into the floor, such as floor-mounted water closets.

  • Can be more prone to siphonage (loss of water seal) if not vented properly.

  • Like P-trap, it holds a water seal to block sewer gases.

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