The GATE Grind

GATE Biomechanics: Soft Tissue Mechanics – Previous Year Questions

15 GATE previous year questions on Soft Tissue Mechanics (Biomechanics, Biomedical Engineering) with answers and explanations, from every paper.

  1. GATE 2021 BM Q25 (1 mark, Multiple choice) – Treat blood as red cells suspended in a Newtonian fluid. What is the intended effect of flow-induced shear forces on red-cell orientation?
  2. GATE 2021 BM Q57 (2 marks, Numerical answer) – A renal artery has lumen diameter 5 mm and mean blood speed 40 cm/s. Blood density is 1060 kg/m³ and viscosity 3 cP. Find Reynolds number to the…
  3. GATE 2022 BM Q46 (2 marks, Multiple choice) – Which relation approximates arterial pulse-wave speed C in terms of inner diameter D, wall thickness t, wall elastic modulus E and fluid density ρ?
  4. GATE 2023 BM Q24 (1 mark, Multiple choice) – Which dimensions represent dynamic viscosity, using M for mass, L for length and T for time?
  5. GATE 2023 BM Q31 (1 mark, Numerical answer) – A tissue has Young’s modulus 3.6 kPa and Poisson’s ratio 0.2. Find its shear modulus in kPa, rounded to one decimal place.
  6. GATE 2024 BM Q31 (1 mark, Numerical answer) – A cylindrical tissue has diameter 2 cm,height 3 cm,Young’s modulus 20 MPa. Under axial tensile force 10 N, find the percentage height increase to two…
  7. GATE 2025 BM Q22 (1 mark, Multiple choice) – A 1 μm bacterium, 10 cm fish and 10 m whale each swim one body length per second in water. Their Reynolds numbers are R1,R2,R3 respectively. Which…
  8. GATE 2025 BM Q23 (1 mark, Multiple choice) – A rod’s shape is position r(s) at arclength s, 0≤s≤l. Its bending energy is E=K 0l 2 r/ s2 2ds. Find dimensions of K.
  9. GATE 2025 BM Q34 (1 mark, Multiple choice) – A tissue has Young’s modulus 4 kPa and shear modulus 1.5 kPa. Find Poisson’s ratio under the isotropic elastic relation.
  10. GATE 2025 BM Q49 (2 marks, Multiple select) – A Newtonian fluid of viscosity μ flows laminarly through a radius-R tube under a constant axial pressure gradient, with no slip. At radial position r,…
  11. GATE 2025 BM Q58 (2 marks, Numerical answer) – For pulsatile flow in an artery of internal diameter 20 mm, wall thickness 1 mm and Young’s modulus 1 MPa, find wave speed in m/s to one decimal…
  12. GATE 2025 BM Q59 (2 marks, Numerical answer) – An ideal massless spring with stiffness 1 N/m is cut into five equal lengths. Two pieces are connected in parallel as shown. Find resultant stiffness,…
  13. GATE 2026 BM Q20 (1 mark, Multiple choice) – An incompressible cylindrical tissue initially has diameter 2 cm and height 3 cm. It undergoes homogeneous axial stretching by 10%. Find its final…
  14. GATE 2026 BM Q42 (2 marks, Multiple choice) – A uniform 0.01 N shear force acts on the top of a 1 cm-sided tissue cube. The deformed shear angle is θ=5°. Treat the tissue as linear, isotropic and…
  15. GATE 2026 BM Q59 (2 marks, Numerical answer) – Steady laminar blood flow passes through a tapered circular vessel. At sections A,B, radii are 0.5,0.45 cm. Average speed at A is 1 cm/s. Assuming…