MCQs on wearable biosensors

By | December 23, 2023

1. Which of the following is an example of a wearable biosensor?
A) Thermometer B) Stethoscope C) Fitbit D) MRI machine

2. What type of data can photoplethysmography sensors measure?
A) Heart rate B) Blood pressure C) Blood glucose levels D) Body temperature

3. Which part of the body are pulse oximetry sensors typically worn on?
A) Finger B) Wrist C) Upper arm D) Ankle

4. What type of biosensors use change in electrical conductivity to measure body functions?
A) Potentiometric B) Amperometric C) Conductometric D) Impendence-based

5. Which of the following is an example of a textile-integrated biosensor?
A) Smartwatch B) Fitness armband C) Skin patch D) All of the above

6. Bioimpedance sensors measure changes in ______ caused by body movements and physiology.
A) Resistance B) Capacitance C) Inductance D) Reactance

7. Which of the following parameters can be monitored using galvanic skin response sensors?
A) Skin hydration B) Skin glucose levels C) Sweat rate D) Stress levels

8. What component is required for wireless data transmission in a wearable device?
A) Bluetooth B) Antenna C) Processor D) Battery

9. Which type of material is photovoltaic cells made from to convert light to electrical energy?
A) Silicon B) Carbon C) Graphene D) Chlorophyll

10. What is the function of an amplifier circuit in a wearable sensor?
A) Increase signal strength B) Filter noise C) Transmit data D) Save energy

11. Which part of a wearable sensor handles data collection, storage and processing?
A) Microcontroller B) Transmitter C) Sensor D) Display

12. How are piezoelectric sensors used as a method of energy harvesting?
A) Capture kinetic energy from muscle contractions B) Vibrate when exposed to light
C) Convert sweat to electricity D) Absorb radio waves for power

13. Materials like graphene and carbon nanotubes are used to create wearable biosensors due to their:
A) Flexibility B) Conductivity C) Strength D) All of the above

14. What component allows wireless communication between a wearable device and smartphone?
A) Wi-Fi chip B) Bluetooth chip C) RFID tag D) NFC chip

15. Which of the following measures hydration level through perspiration?
A) Glucose meter B) Hygrometer C) Accelerometer D) Thermometer

16. What type of wearable device can be embedded under the skin for long-term monitoring?
A) Smart tattoo B) Smart contact lenses
C) Smart bandage D) All of the above

17. What part of the device requires miniaturizing the most for wearable sensors?
A) Battery B) Processor C) Sensor D) Memory

18. What component does a flexible printed circuit board replace in traditional rigid PCBs?
A) Capacitors B) Resistors C) Wires D) Soldering

19. What type of display is becoming popular for heads-up displays in smartglasses?

20. Functional fabrics that can sense, communicate and display data are called:
A) Electronic textiles B) Smart fabrics C) Wearable electronics D) All are correct

21. Biofuel cells use chemical reactions of which substance to generate electric current?
A) Lactate B) Glucose C) Ketones D) Amino acids

22. What frequency range do Bluetooth devices use for wireless communication?
A) 3-30 GHz B) 100-200 MHz C) 2.4-2.485 GHz D) 900-1000 MHz

23. Which of the following passive components does not require power?
A) Transistors B) Sensors C) Resistors D) Capacitors

24. What component is responsible for conversion of one form of energy to another?
A) Transducer B) Transmitter C) Receiver D) Controller

25. What type of biosensor measures volatile organic compounds from sweat?
A) E-nose B) Photoacoustic C) Bioimpedance D) Photoplethysmography

26. Which of the following measures contraction and relaxation of muscles?
A) Electromyography B) Electrocardiography C) Pulse oximeter D) Thermometer

27. Blood pressure monitoring is a non-invasive process achieved through:
A) Sphygmomanometer B) Tonometry C) Phonocardiography D) Oxiology

28. Monitoring brain waves for signs of drowsiness, seizures, etc uses:

29. A class of biofuel cells that use glucose as fuel is called:
A) Methanol fuel cells B) Enzyme fuel cells
C) Microbial fuel cells D) Photosynthetic fuel cells

30. The temperature coefficient of a material is a measure of its:
A) Conductivity B) Resistance C) Capacitance D) Inductance

31. What component converts the analog bio-potential signal into a digital one:
A) Temperature sensor B) Amplifier C) ADC D) Processor

32. Integrated smartphone apps enable real-time processing of data from:
A) Portable diagnostic kits B) Embedded sensors
C) Wearable sensor patches D) All of the above

33. What type of biometrics does an gait analysis wearable measure:
A) Facial parameters B) Fingerprints
C) Footfall patterns D) Retinal scans

34. Which of the following data mining tools is useful for sensor data:
A) Python B) R C) Tableau D) All of the above

35. Cloud-based storage and analysis of sensor readings from dispersed IoT devices aids:
A) Remote patient monitoring B) Predictive healthcare
C) Digital biomarker discovery D) All of the above

36. Continuous reading of vital signs helps detect patterns and may provide early warnings for:
A) Cardiovascular/respiratory conditions B) Lifestyle-related chronic diseases
C) Mental illness D) All of the above

37. The sensor, analog front-end and firmware run continuously while the MCU and radio trigger intermittently to:
A) Conserve battery life B) Conserve memory
C) Prolong sensor life D) Maintain connectivity

38. New technology like integrated circuits and flexible hybrid electronics enable creation of:
A) Thin, compact, lightweight devices B) Invisible/disappearing form factors
C) Both A and B D) None of the above

39. With advances in energy harvesting and storage capacity, some biosensors may soon be:
A) Single use B) Disposable C) Perpetual D) Implantable

40. Security and privacy of medical-grade wearable data transmitted over networks pose unique:
A) Data ownership issues B) Device authentication challenges
C) Both A and B D) None of the above