The GATE Grind

GATE Farm Power: Sources of Power – Previous Year Questions

8 GATE previous year questions on Sources of Power (Farm Power, Agricultural Engineering) with answers and explanations, from every paper.

  1. GATE 2021 AG Q39 (2 marks, Multiple choice) – A solar panel is 1.3×.65 m;cells cover90%,conversion efficiency13.7%,irradiance750 W/m². At maximum power, voltage18 V. Two identical panels in series…
  2. GATE 2021 AG Q55 (2 marks, Numerical answer) – A 4 m horizontal-axis lift wind rotor runs a pump in 15 km/h wind, air density1.23 kg/m³. Far-wake velocity is one-third approach velocity. Find rotor…
  3. GATE 2022 AG Q15 (1 mark, Multiple choice) – The complement of the solar altitude angle is .
  4. GATE 2023 AG Q54 (2 marks, Numerical answer) – Solar irradiance varies400–750 W/m² and maximum PV efficiency is 14%. Cell Voc=21.6 V, Isc=3.22 A, fill factor.72. Find minimum cell area ensuring the…
  5. GATE 2024 AG Q51 (2 marks, Numerical answer) – A 1.5 kW diesel engine runs continuously for two hours in dual-fuel biogas/diesel mode. Biogas requirement is .67 m³/(kW·hour). A KVIC plant has gas…
  6. GATE 2025 AG Q44 (2 marks, Numerical answer) – A south-facing flat-plate solar collector at Bhopal (23°15′N,77°42′E) is tilted 30° from horizontal. On June 30,2023 at 3 PM local apparent time, the…
  7. GATE 2025 AG Q57 (2 marks, Numerical answer) – A horizontal-axis wind turbine has 24 m rotor diameter, wind speed 6 m/s, air density 1.23\,kg/m3,power coefficient .3,transmission efficiency .9 and…
  8. GATE 2026 AG Q40 (2 marks, Multiple choice) – A horizontal-axis wind turbine must deliver 2 kW shaft power at 7 m/s wind speed. Power coefficient is .36,drivetrain efficiency .90,and air density…