The GATE Grind

GATE Sensors and Bioinstrumentation: Physiological Measurements – Previous Year Questions

10 GATE previous year questions on Physiological Measurements (Sensors and Bioinstrumentation, Biomedical Engineering) with answers and explanations, from every paper.

  1. GATE 2020 BM Q13 (1 mark, Multiple choice) – Which equipment measures blood-vessel elasticity in vivo?
  2. GATE 2020 BM Q24 (1 mark, Multiple choice) – During stethoscopic examination at the left midclavicular line in the fifth intercostal space, a murmur is heard between the first and second heart…
  3. GATE 2020 BM Q64 (2 marks, Numerical answer) – A C-clamp magnetic arterial-flow probe records 3.75 nV between diametrically opposite vessel points. Inner diameter is 0.5 cm and magnetic flux…
  4. GATE 2021 BM Q54 (2 marks, Multiple select) – A clinician estimates cardiac output by thermodilution. A 2.0 mL saline injection at 7°C enters the right atrium, and the pulmonary-artery…
  5. GATE 2022 BM Q29 (1 mark, Multiple select) – Which statements about pulse oximetry are correct?
  6. GATE 2022 BM Q60 (2 marks, Numerical answer) – A Hall-effect blood-flow meter uses magnetic field B, transverse voltage V and vessel diameter D to calculate flow. It reported 100 cm³/s. Calibration…
  7. GATE 2023 BM Q20 (1 mark, Multiple choice) – Korotkoff sounds are used in which measurement technique?
  8. GATE 2024 BM Q35 (1 mark, Numerical answer) – Use Wien’s displacement constant 2.898×10⁻³ m K to find the peak black-body emission wavelength of a human body at 37°C. Give μm to two decimals.
  9. GATE 2024 BM Q43 (2 marks, Multiple choice) – In the shown pressure catheter–diaphragm sensor, liquid resistance RL arises from viscous friction. Only catheter radius is doubled, with pressure…
  10. GATE 2024 BM Q64 (2 marks, Numerical answer) – Motor nerve stimulation is 4 cm and 24 cm from the recording site. Corresponding distal and proximal latencies are 6 and 10 ms. Find conduction…