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Latest GATE Biomedical Engineering Exam Question (Objective Questions), MCQ in English

Subjects : Biomedical Engineering

Question Bank GATE Biomedical Engineering Exam (Only MCQ) - English
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Biomedical Engineering

Question 1Single Answer
In a block diagram, a feedback loop is used to:
  1. A
    Compare the output with the reference input.
  2. B
    Amplify the input signal.
  3. C
    Generate high-frequency signals.
  4. D
    Eliminate the controller.
Question 2Single Answer
The steady-state error for a ramp input in a type-2 system is:
  1. A
    Proportional to the input magnitude.
  2. B
    Infinite.
  3. C
    Constant but non-zero.
  4. D
    Zero.
Question 3Single Answer
In a ventilator, a feedback control system ensures:
  1. A
    Amplification of sensor signals.
  2. B
    Accurate delivery of oxygen based on sensor feedback.
  3. C
    Generation of high-frequency signals.
  4. D
    Direct measurement of bio-signals.
Question 4Single Answer
The phase margin of a control system indicates:
  1. A
    The steady-state error of the system.
  2. B
    The gain at the crossover frequency.
  3. C
    The additional phase shift needed for instability.
  4. D
    The damping ratio of the system.
Question 5Single Answer
In an open-loop control system, the output is:
  1. A
    Always stable.
  2. B
    Directly proportional to the feedback signal.
  3. C
    Controlled by the feedback loop.
  4. D
    Independent of the actual system output.
Question 6Single Answer
In an infusion pump, a closed-loop control system uses:
  1. A
    Amplification of sensor signals.
  2. B
    Feedback from flow sensors to adjust motor speed
  3. C
    Generation of high-frequency signals.
  4. D
    Direct measurement of bio-signals.
Question 7Single Answer
In a control system, negative feedback:
  1. A
    Increases the error between desired and actual output.
  2. B
    Reduces the error between desired and actual output.
  3. C
    Eliminates the controller.
  4. D
    Amplifies the input signal.
Question 8Single Answer
In a ventilator, a PID controller is used to:
  1. A
    Amplify sensor signals.
  2. B
    Regulate air pressure for consistent breathing support.
  3. C
    Generate high-frequency signals.
  4. D
    Measure bio-signals directly.
Question 9Single Answer
The steady-state error for a step input in a type-0 system is:
  1. A
    Zero.
  2. B
    Constant but non-zero.
  3. C
    Infinite.
  4. D
    Proportional to the input magnitude.
Question 10Single Answer
In a block diagram, a transfer function block represents:
  1. A
    The output signal only.
  2. B
    The static gain of the system.
  3. C
    The input signal only.
  4. D
    The dynamic behavior of a system component.
Question 11Single Answer
The closed-loop transfer function of a system with G(s) = 25/(s + 5) and H(s) = 1 is:
  1. A
    25/(s + 5).
  2. B
    25/(s + 30).
  3. C
    5/(s + 25).
  4. D
    25s/(s + 5).
Question 12Single Answer
In an infusion pump, a feedback control system ensures:
  1. A
    Accurate fluid delivery based on sensor feedback.
  2. B
    Amplification of sensor signals.
  3. C
    Generation of high-frequency signals.
  4. D
    Direct measurement of bio-signals.
Question 13Single Answer
The poles of a transfer function determine:
  1. A
    The steady-state gain of the system.
  2. B
    The stability and dynamic response of the system.
  3. C
    The input signal’s frequency.
  4. D
    The output signal’s amplitude.
Question 14Single Answer
In a closed-loop control system, the gain margin indicates:
  1. A
    The factor by which the gain can increase before instability.
  2. B
    The phase shift at the crossover frequency.
  3. C
    The steady-state error of the system.
  4. D
    The damping ratio of the system.
Question 15Single Answer
In a ventilator, a closed-loop control system uses:
  1. A
    Amplification of sensor signals.
  2. B
    Feedback from pressure sensors to regulate airflow.
  3. C
    Generation of high-frequency signals.
  4. D
    Direct measurement of bio-signals.
Question 16Single Answer
The transfer function of a system with a zero at s = -4 and a pole at s = -5 is:
  1. A
    s/(s + 5).
  2. B
    (s + 5)/(s + 4).
  3. C
    s/(s + 4).
  4. D
    (s + 4)/(s + 5).
Question 17Single Answer
In a control system, positive feedback:
  1. A
    Increases system instability.
  2. B
    Reduces system instability.
  3. C
    Eliminates the controller.
  4. D
    Amplifies the input signal only.
Question 18Single Answer
In an infusion pump, a closed-loop control system uses a:
  1. A
    PID controller to adjust fluid flow rate.
  2. B
    Low-pass filter to amplify signals.
  3. C
    High-pass filter to remove noise.
  4. D
    Open-loop controller for simplicity.
Question 19Single Answer
The steady-state error for a ramp input in a type-1 system is:
  1. A
    Zero.
  2. B
    Constant but non-zero.
  3. C
    Infinite.
  4. D
    Proportional to the input magnitude.
Question 20Single Answer
In a ventilator, a feedback control system ensures:
  1. A
    Accurate delivery of oxygen based on sensor feedback.
  2. B
    Amplification of sensor signals.
  3. C
    Generation of high-frequency signals.
  4. D
    Direct measurement of bio-signals.
Question 21Single Answer
The phase margin of a control system indicates:
  1. A
    The additional phase shift needed for instability.
  2. B
    The gain at the crossover frequency.
  3. C
    The steady-state error of the system.
  4. D
    The damping ratio of the system.
Question 22Single Answer
In an open-loop control system, the output is:
  1. A
    Always stable.
  2. B
    Directly proportional to the feedback signal.
  3. C
    Controlled by the feedback loop.
  4. D
    Independent of the actual system output.
Question 23Single Answer
In an infusion pump, a closed-loop control system uses:
  1. A
    Generation of high-frequency signals.
  2. B
    Amplification of sensor signals.
  3. C
    Feedback from flow sensors to adjust motor speed
  4. D
    Direct measurement of bio-signals.
Question 24Single Answer
In a control system, negative feedback:
  1. A
    Increases the error between desired and actual output.
  2. B
    Reduces the error between desired and actual output.
  3. C
    Eliminates the controller.
  4. D
    Amplifies the input signal.
Question 25Single Answer
In a ventilator, a PID controller is used to:
  1. A
    Measure bio-signals directly.
  2. B
    Amplify sensor signals.
  3. C
    Generate high-frequency signals.
  4. D
    Regulate air pressure for consistent breathing support.
Question 26Single Answer
What is the primary advantage of using a piezoelectric sensor in biomedical applications?
  1. A
    Resistance to electromagnetic interference
  2. B
    Low power consumption
  3. C
    Wide frequency response
  4. D
    High sensitivity to mechanical stress
Question 27Single Answer
What is a key challenge in designing a capacitive sensor for respiratory rate monitoring?
  1. A
    Sensitivity to environmental humidity
  2. B
    Limited frequency response
  3. C
    High power consumption
  4. D
    Low output impedance
Question 28Single Answer
In an inductive sensor used for detecting cardiac motion, what is the primary principle of operation?
  1. A
    Voltage generation due to mechanical stress
  2. B
    Change in capacitance due to plate movement
  3. C
    Change in inductance due to magnetic field variation
  4. D
    Resistance change due to temperature
Question 29Single Answer
What is the primary role of a signal conditioning circuit in a biomedical sensor system?
  1. A
    Stabilizes power supply
  2. B
    Converts digital signals to analog
  3. C
    Generates mechanical stress
  4. D
    Amplifies and filters sensor output
Question 30Single Answer
What is a key limitation of using electrochemical sensors in continuous glucose monitoring?
  1. A
    Sensitivity to biofouling
  2. B
    High power consumption
  3. C
    Limited frequency response
  4. D
    Low output impedance
Question 31Single Answer
In an optical sensor used for pulse oximetry, what is the primary advantage of using dual-wavelength LEDs?
  1. A
    Differentiates oxyhemoglobin and deoxyhemoglobin
  2. B
    Increases signal amplitude
  3. C
    Reduces power consumption
  4. D
    Eliminates motion artifacts
Question 32Single Answer
What is the primary role of a LASER-based sensor in biomedical diagnostics?
  1. A
    Temperature stabilization
  2. B
    Mechanical stress measurement
  3. C
    Low-frequency signal amplification
  4. D
    High-precision tissue imaging
Question 33Single Answer
In a piezoelectric sensor for ultrasound imaging, what is the resonance frequency if the thickness is 1 mm and the speed of sound in the material is 4000 m/s?
  1. A
    4 MHz
  2. B
    2 MHz
  3. C
    1 MHz
  4. D
    8 MHz
Question 34Single Answer
What is a key challenge in using resistive sensors for temperature measurement in biomedical applications?
  1. A
    Low output impedance
  2. B
    High power consumption
  3. C
    Limited frequency response
  4. D
    Non-linear resistance-temperature relationship
Question 35Single Answer
In a capacitive sensor for detecting chest movement, what is the capacitance change if the plate separation decreases by 0.1 mm, initial separation is 1 mm, and initial capacitance is 10 pF?
  1. A
    0.25 pF
  2. B
    0.5 pF
  3. C
    2.0 pF
  4. D
    1.11 pF
Question 36Single Answer
What is the primary advantage of using a Hall effect sensor in biomedical applications?
  1. A
    Resistance to biofouling
  2. B
    High sensitivity to mechanical stress
  3. C
    Low-frequency signal amplification
  4. D
    Non-contact magnetic field measurement
Question 37Single Answer
In an electrochemical sensor for pH measurement, what is the primary source of measurement error?
  1. A
    Electrode drift over time
  2. B
    High power consumption
  3. C
    Limited frequency response
  4. D
    Low output impedance
Question 38Single Answer
What is a key limitation of using optical sensors in pulse oximetry?
  1. A
    Sensitivity to motion artifacts
  2. B
    High power consumption
  3. C
    Limited frequency response
  4. D
    Low output impedance
Question 39Single Answer
In a LASER-based sensor for retinal diagnostics, what is the primary advantage of coherence?
  1. A
    High-resolution imaging
  2. B
    Increased signal amplitude
  3. C
    Reduced power consumption
  4. D
    Elimination of biofouling
Question 40Single Answer
What is the primary role of a signal conditioning circuit in an ECG sensor system?
  1. A
    Stabilizes power supply
  2. B
    Converts analog signals to digital
  3. C
    Generates mechanical stress
  4. D
    Amplifies low-level biopotential signals
Question 41Single Answer
In a piezoelectric sensor used for blood pressure monitoring, what is the output voltage if the sensitivity is 10 mV/Pa and pressure is 100 Pa?
  1. A
    10 V
  2. B
    0.1 V
  3. C
    1 V
  4. D
    0.01 V
Question 42Single Answer
What is a key challenge in using inductive sensors for implantable devices?
  1. A
    Low output impedance
  2. B
    High power consumption
  3. C
    Limited range due to tissue attenuation
  4. D
    Non-linear response
Question 43Single Answer
In an optical sensor for blood glucose monitoring, what is the primary principle of operation?
  1. A
    Mechanical stress measurement
  2. B
    Light absorption by glucose molecules
  3. C
    Magnetic field variation
  4. D
    Capacitance change
Question 44Single Answer
What is the primary advantage of using a resistive sensor in a biomedical strain gauge?
  1. A
    Resistance to electromagnetic interference
  2. B
    Low power consumption
  3. C
    Wide frequency response
  4. D
    High sensitivity to deformation
Question 45Single Answer
In a capacitive sensor for detecting diaphragm movement, what is the capacitance if the plate area is 2 cm², separation is 0.5 mm, and dielectric constant is 1?
  1. A
    8.85 pF
  2. B
    17.7 pF
  3. C
    70.8 pF
  4. D
    35.4 pF
Question 46Single Answer
What is a key limitation of using Hall effect sensors in biomedical flow meters?
  1. A
    Low output impedance
  2. B
    High power consumption
  3. C
    Limited frequency response
  4. D
    Sensitivity to external magnetic fields
Question 47Single Answer
In an electrochemical sensor for oxygen measurement, what is the primary source of error?
  1. A
    Low output impedance
  2. B
    High power consumption
  3. C
    Limited frequency response
  4. D
    Electrode surface degradation
Question 48Single Answer
What is the primary role of a LASER-based sensor in photodynamic therapy?
  1. A
    Low-frequency signal amplification
  2. B
    Mechanical stress measurement
  3. C
    Precise delivery of therapeutic light
  4. D
    Temperature stabilization
Question 49Single Answer
In a piezoelectric sensor for ultrasound imaging, what is the resonance frequency if the thickness is 0.5 mm and the speed of sound in the material is 4000 m/s?
  1. A
    2 MHz
  2. B
    4 MHz
  3. C
    8 MHz
  4. D
    1 MHz
Question 50Single Answer
What is a key challenge in using optical sensors for in-vivo glucose monitoring?
  1. A
    Low output impedance
  2. B
    High power consumption
  3. C
    Limited frequency response
  4. D
    Tissue scattering of light
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