Biomedical Instrumentation – MCQs

1. Which electrode is commonly used for ECG measurement?
(A) Silver chloride electrode
(B) Copper electrode
(C) Zinc electrode
(D) Iron electrode

2. Which device is used to measure blood pressure non-invasively?
(A) Thermistor
(B) Sphygmomanometer
(C) Oximeter
(D) ECG machine

3. What does EEG measure?
(A) Heart activity
(B) Brain activity
(C) Muscle activity
(D) Lung function

4. Which biomedical instrument measures the oxygen saturation of blood?
(A) Spirometer
(B) Pulse oximeter
(C) Manometer
(D) Electromyograph

5. The pacemaker is used for:
(A) Blood pressure monitoring
(B) Heart rhythm regulation
(C) Brain wave analysis
(D) Blood glucose measurement

6. What does EMG record?
(A) Brain activity
(B) Muscle activity
(C) Lung function
(D) Blood flow

7. Which component is essential in biomedical imaging?
(A) Ultrasound transducer
(B) Thermocouple
(C) Rheostat
(D) Capacitor

8. Which gas is measured in capnography?
(A) Oxygen
(B) Carbon dioxide
(C) Nitrogen
(D) Helium

9. Which technique is used in MRI?
(A) X-rays
(B) Radio waves and magnetic fields
(C) Ultrasound waves
(D) Infrared rays

10. What is the full form of CT in medical imaging?
(A) Clinical Therapy
(B) Computed Tomography
(C) Cardiovascular Test
(D) Computerized Tracking

11. Which sensor is commonly used for temperature measurement in biomedical systems?
(A) Thermistor
(B) Potentiometer
(C) Photodiode
(D) Strain gauge

12. Which type of signal is obtained from biological systems?
(A) Digital signal
(B) Analog signal
(C) Pulse signal
(D) Binary signal

13. Which electrode is used in pH measurement?
(A) Copper electrode
(B) Glass electrode
(C) Carbon electrode
(D) Zinc electrode

14. Which instrument measures lung function?
(A) ECG
(B) Spirometer
(C) Pacemaker
(D) Defibrillator

15. Which frequency range is used in diagnostic ultrasound?
(A) 20–200 Hz
(B) 20 kHz–2 MHz
(C) 2–20 MHz
(D) 200–500 MHz

16. Which instrument is used to restart the heart during cardiac arrest?
(A) Pacemaker
(B) Defibrillator
(C) Oximeter
(D) Stethoscope

17. The normal ECG consists of how many waves?
(A) 2
(B) 3
(C) 5
(D) 7

18. Which biomedical device is used for hearing impairment?
(A) Pacemaker
(B) Hearing aid
(C) Defibrillator
(D) Spirometer

19. What does a sphygmomanometer measure?
(A) Blood pressure
(B) Heart rate
(C) Lung capacity
(D) Oxygen level

20. Which imaging method uses X-rays?
(A) Ultrasound
(B) MRI
(C) CT scan
(D) PET scan

21. Which electrode is widely used in bio-potential measurement?
(A) Ag-AgCl electrode
(B) Zn electrode
(C) Ni electrode
(D) Fe electrode

22. Which biomedical device measures blood glucose non-invasively?
(A) Oximeter
(B) Glucometer
(C) Spirometer
(D) Manometer

23. What is the function of dialysis machine?
(A) Heart stimulation
(B) Blood purification
(C) Lung function monitoring
(D) Brain wave recording

24. The stethoscope works on the principle of:
(A) Reflection
(B) Amplification of sound
(C) Magnetic resonance
(D) Ultrasound

25. Which technique is used in PET scan?
(A) X-rays
(B) Gamma rays
(C) Positron emission
(D) Ultrasound

26. Which sensor is used in strain measurement?
(A) Thermistor
(B) Photodiode
(C) Strain gauge
(D) Capacitor

27. Which instrument measures electrical activity of the heart?
(A) EEG
(B) ECG
(C) EMG
(D) MRI

28. Which electrode is non-polarizable?
(A) Ag-AgCl electrode
(B) Calomel electrode
(C) Copper electrode
(D) Zinc electrode

29. Which biomedical device helps patients with irregular heartbeat?
(A) Spirometer
(B) Pacemaker
(C) Defibrillator
(D) Glucometer

30. The main component of X-ray tubes is:
(A) Cathode and anode
(B) Thermistor and capacitor
(C) Coil and magnet
(D) Electrode and photodiode

31. Which biomedical test is used to study sleep disorders?
(A) ECG
(B) EEG
(C) Polysomnography
(D) Spirometry

32. Which unit is used to measure blood pressure?
(A) mmHg
(B) Pascal
(C) Joule
(D) Bar

33. Which type of waves are detected in ultrasound imaging?
(A) Sound waves
(B) Radio waves
(C) Light waves
(D) X-rays

34. The galvanic skin response measures:
(A) Muscle activity
(B) Electrical conductance of skin
(C) Blood flow
(D) Oxygen saturation

35. Which imaging method gives the best soft tissue contrast?
(A) X-ray
(B) MRI
(C) CT scan
(D) Ultrasound

36. Which amplifier is used in biomedical instrumentation?
(A) Operational amplifier
(B) Power amplifier
(C) RF amplifier
(D) Audio amplifier

37. What does plethysmography measure?
(A) Lung volume changes
(B) Blood glucose level
(C) Heart rate
(D) Brain activity

38. Which electrode is used for pH reference measurement?
(A) Calomel electrode
(B) Silver electrode
(C) Zinc electrode
(D) Copper electrode

39. Which component is used to filter biomedical signals?
(A) Capacitor
(B) Resistor
(C) Inductor
(D) Filters

40. Which type of radiation is used in X-ray imaging?
(A) Alpha rays
(B) Beta rays
(C) Gamma rays
(D) X-rays

41. Which biomedical instrument uses Doppler effect?
(A) MRI
(B) Ultrasound
(C) PET scan
(D) CT scan

42. What is the main advantage of fiber optic sensors in biomedical use?
(A) Cost-effective
(B) Immune to electromagnetic interference
(C) Requires no calibration
(D) High voltage operation

43. Which parameter does electroencephalography (EEG) monitor?
(A) Muscle activity
(B) Heart activity
(C) Brain waves
(D) Blood glucose

44. Which is the most common biomedical signal amplifier configuration?
(A) Differential amplifier
(B) Common base amplifier
(C) Common collector amplifier
(D) Class B amplifier

45. Which unit is used to express electrical potential in biomedical signals?
(A) Ohm
(B) Volt
(C) Ampere
(D) Watt

46. The biomedical instrument used to detect eye movement is:
(A) Spirometer
(B) Electrooculograph
(C) Electromyograph
(D) Plethysmograph

47. Which biomedical technique uses contrast agents?
(A) Ultrasound
(B) X-ray angiography
(C) EEG
(D) EMG

48. Which device is used for continuous heart monitoring?
(A) ECG machine
(B) Holter monitor
(C) Defibrillator
(D) Pacemaker

49. Which parameter is measured by spirometry?
(A) Lung capacity
(B) Heart rate
(C) Blood glucose
(D) Brain activity

50. Which biomedical instrument converts sound energy into electrical signals?
(A) Microphone
(B) Thermistor
(C) Photodiode
(D) Strain gauge