The GATE Grind

GATE 2023 AR — Architecture – Question 63

Building Services · Plumbing systems · 2 marks · Multiple select

Which plumbing statements are correct?

  1. Sink and bath wastewater enters a gully trap through its top, while courtyard wash enters from its side.
  2. Anti-siphon traps have a reduced waterway at the inlet and a larger outlet preventing full-pipe siphonic action.
  3. Intercepting traps prevent street-sewer gases entering the house drain.
  4. P, Q and S traps are named according to shape.

Practise this question in The GATE Grind →

Show answer and explanation

Correct answer: (C) Intercepting traps prevent street-sewer gases entering the house drain.; (D) P, Q and S traps are named according to shape.

Explanation

Intercepting traps provide a water seal between the house drain and sewer (C), and P/Q/S identify outlet/trap geometry (D). A reverses the usual side connection for fixture wastewater and top entry for surface wash. B reverses the intended anti-siphon geometry; the described smaller inlet/larger outlet is not accepted. Select C, D, matching the final key.