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GATE 2025 AR — Architecture – Question 59

Building Services · Water supply and distribution system · 2 marks · Multiple choice

Match pump terms P suction lift, Q discharge lift, R rotary pump, S priming with 1 discharge-point/pump elevation difference, 2 filling the casing with air to remove trapped air, 3 low-water-level/pump elevation difference, 4 water moved around casing sides to discharge, 5 pump work in raising water. Retain the printed descriptions.

  1. P–3; Q–1; R–4; S–2
  2. P–4; Q–5; R–3; S–1
  3. P–3; Q–1; R–5; S–4
  4. P–1; Q–5; R–4; S–2

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Correct answer: (A) P–3; Q–1; R–4; S–2

Explanation

Suction lift is the elevation difference from low water to pump(3); discharge lift is pump to outlet(1); the described rotary action moves water around the casing(4). These identify A. Source error:description 2 incorrectly says fill with air. Priming normally fills the casing and suction passage with liquid to expel trapped air. The key’s S–2 match is retained with this correction explained.