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GATE Fluid Mechanics and Mechanical Operations: Flow through pipes, friction factors, flow meters and pumps – Previous Year Questions

10 GATE previous year questions on Flow through pipes, friction factors, flow meters and pumps (Fluid Mechanics and Mechanical Operations, Chemical Engineering) with answers and explanations, from every paper.

  1. GATE 2022 CH Q51 (2 marks, Numerical answer) – Two reservoirs located at the same altitude are connected by a straight horizontal pipe of length 120 m and inner diameter 0.5 m, as shown in the…
  2. GATE 2022 CH Q52 (2 marks, Numerical answer) – A venturi meter (venturi coefficient, C v = 0.98) is connected to a pipe of inner diameter 50 mm. Water (density 1000 kg m-3) is flowing through the…
  3. GATE 2023 CH Q33 (1 mark, Numerical answer) – The viscosity of an incompressible Newtonian fluid is measured using a capillary tube of diameter 0.5 mm and length 1.5 m. The fluid flow is laminar,…
  4. GATE 2023 CH Q51 (2 marks, Numerical answer) – A pump draws water (density = 1000 kg m-3) at a steady rate of 10 kg s-1. The pressures at the suction and discharge sides of the pump are −20 kPa…
  5. GATE 2024 CH Q33 (1 mark, Numerical answer) – Consider the steady, uni-directional, fully-developed, pressure-driven laminar flow of an incompressible Newtonian fluid through a circular pipe of…
  6. GATE 2024 CH Q59 (2 marks, Numerical answer) – Water of density 1000 kg m-3 is pumped at a volumetric flow rate of 3.14 10-2 m3 s-1, through a pipe of inner diameter 10 cm and length 100 m, from a…
  7. GATE 2024 CH Q60 (2 marks, Numerical answer) – A Venturi meter with a throat diameter d = 2 cm measures the flow rate in a pipe of diameter D = 6 cm, as shown in the figure. A U-tube manometer is…
  8. GATE 2025 CH Q43 (2 marks, Multiple select) – For a steady state, fully developed laminar flow of a Newtonian fluid through a cylindrical pipe at a constant volumetric flow rate, which of the…
  9. GATE 2025 CH Q50 (2 marks, Numerical answer) – An adiabatic pump of efficiency 40% is used to increase the water pressure from 200 kPa to 600 kPa. The flow rate of water is 600 L/min. The specific…
  10. GATE 2026 CH Q32 (1 mark, Numerical answer) – Water is discharged from vertical side of a tank through a circular orifice of diameter 2 cm under laminar flow conditions. The water surface in the…