Biomedical Engineering Gate 2022 Questions with Answer
Ques 14 GATE 2022
Which of the following statements related to biomedical measurements are TRUE?
Ques 15 GATE 2022
The thickness of piezoelectric crystal (PZT5A) used in ultrasound applications will determine the resonant frequency of the transducer. To work at a resonance frequency of 5 MHz, the thickness of a PZT5A transducer must be _______ mm (rounded off to three decimal places).
Given: The velocity of sound in PZT5A is 4350 m.s⁻¹.
Ques 16 GATE 2022
Consider the Einthoven's triangle of frontal ECG for the 3 electrodes RA, LA and LL shown in the figure. The augmented lead vectors bisect the bipolar lead vectors. At the peak of R wave, the cardiac vector M points vertically downwards with |M| = 5 mV.
The voltages on leads I and aVF are _______ mV and _______ mV, respectively.
Ques 17 GATE 2022
Independent voltage measurements (μ±σ) of three sensors where μ and σ are the mean and standard deviation of the measurements, respectively are as follows: v1 = 4.52±0.02 V, v2 = 4.21±0.20 V, v3 = 3.96±0.15 V. The measurement uncertainty in v1 + v2 + v3 is _______ V (rounded off to two decimal places).
Ques 18 GATE 2022
A moving coil voltmeter has an internal resistance of 50 Ω. The scale of the meter is divided into 100 equal divisions. When a potential of 1 V is applied to terminals of voltmeter, a deflection of 100 divisions is obtained. However, it is desired that when a potential of 500 V is applied to the terminals, a deflection of 100 divisions should be obtained.
The value of resistance that needs to be connected in series to achieve this is _______ Ω.
Ques 19 GATE 2022
A Hall effect flow meter is used to measure the volumetric flow through a blood vessel. The flow meter induces a magnetic field across the vessel and uses a voltmeter to measure the voltage across the vessel which is normal to both magnetic field and blood flow. A caliper is used to measure the vessel diameter. The system calculated the flow rate to be 100 cm³.s⁻¹ using the known magnetic field, and measured values of voltage and vessel diameter.
After the measurement, a calibration is performed, and it is discovered that the voltmeter was measuring 40% larger than the actual value and the caliper was measuring the diameter 10% smaller than the actual value.
Assuming a uniform flow profile along the vessel and ignoring viscosity, the actual blood flow is _______ cm³.s⁻¹ (rounded off to two decimal places).
Ques 20 GATE 2022
A catheter based arterial blood pressure measurement device uses a flexible diaphragm mounted with four identical strain gauges in a Wheatstone bridge configuration as shown in the figure. Assume that the strain gauges have a nominal resistance value of RG = 10 kΩ, Gauge Factor G = 40 and Young's Modulus E = 10 MPa. Blood pressure variations results in small finite change in strain ε (ε>0).
If Vo is the output voltage of the Wheatstone bridge and σ is the stress in MPa, the sensitivity Vo/σ is _______ V.MPa⁻¹.
Ques 21 GATE 2022
The 1st generation (1G) CT scanner uses a point X-ray source and a detector. The source detector assembly can move linearly at a speed of 0.5 m.s⁻¹ and that it takes 0.5 s for source-detector assembly to rotate one angular increment, regardless of the angle.
This scanner is expected to collect 360 projections over 180° of span. The field of view used for data collection has a diameter of 0.5 m. The scan time required is _______ s.
Ques 22 GATE 2022
The inverse square law has a very practical use in radiography. While taking an acceptable chest radiograph of a subject at a distance of 0.75 m from the X-ray generator, X-ray source settings were kept at 50 kVp, 50 mA.s.
If the subject is moved to a distance of 1 m, and the kVp is kept the same, the new value of mA.s to obtain the same exposure will be _______ mA.s (rounded off to two decimal places).
Ques 23 GATE 2022
Myopia occurs when the focal point falls _______ the retina. This can be corrected using a _______ lens.
Ques 24 GATE 2022
Choose the correct sequence for the direction of blood flow in a healthy human being starting and ending with the left ventricle.
Ques 25 GATE 2022
In a healthy adult, which one of the following regions of the brain contains primarily white matter?
Ques 26 GATE 2022
Skeletal muscles are recruited to lift loads. If the force generated in the muscle due to contraction is not sufficient to lift the load, it is known as _______ contraction.
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