GATE Irrigation and Drainage Engineering: Wells and Pumps – Previous Year Questions

5 GATE previous year questions on Wells and Pumps (Irrigation and Drainage Engineering, Agricultural Engineering) with answers and explanations, from every paper.

1. GATE 2022 AG Q17 (1 mark, Multiple choice) – In constructing gravel-packed wells, the pack–aquifer ratio is generally defined as which size ratio?
2. GATE 2023 AG Q61 (2 marks, Numerical answer) – A centrifugal pump at 1000 rpm delivers300 L/min at 30 m head and 65% efficiency. Raise speed to 1200 rpm. Find input power in kW, to two decimals;use…
3. GATE 2024 AG Q60 (2 marks, Numerical answer) – A single-acting reciprocating pump at 40 rpm has piston diameter 20 cm and stroke40 cm. Suction/delivery heads are5/20 m and overall efficiency80%.…
4. GATE 2025 AG Q45 (2 marks, Numerical answer) – A six-stage centrifugal pump delivers 150 L/s against a net pressure rise of 5003 kN/m² at 1450 rpm. Use g=9.81\,m/s2. Find pump specific speed as an…
5. GATE 2026 AG Q35 (1 mark, Numerical answer) – A centrifugal pump’s impeller speed increases by 30%. If its required power becomes n times the original power, find n, to two decimals.