This set of Instrumentation Transducers Multiple Choice Questions & Answers (MCQs) focuses on “Bio Sensors”.
1. SAW stands for ________________
a) Sound actuated wave
b) Surface acoustic wave
c) Sound activated wave
d) Surface activated wave
View Answer
Explanation: SAW stands for surface acoustic wave.
2. Quartz can be used as bio sensors.
a) True
b) False
View Answer
Explanation: In QCM, piezoelectric nature of quartz is utilized.
3. Direction of acoustic wave in QCM will be ______________
a) Same as crystal surface
b) Opposite to crystal surface
c) Perpendicular to crystal surface
d) None of the mentioned
View Answer
Explanation: In QCM, the direction of acoustic wave will be perpendicular to the crystal surface.
4. Acoustic wave in QCM meets minimum impedance when thickness of device is __________________
a) Equal to wavelength of acoustic wave
b) Product of Half of wavelength of acoustic wave
c) Product of quarter of wavelength of acoustic wave
d) None of the mentioned
View Answer
Explanation: When thickness of device is a product of half of wavelength of acoustic wave, it meets minimum impedance.
5. Which of the following is most preferred?
a) QCM and SAW sensor
b) QCM and BAW sensor
c) QCM
d) All of the mentioned
View Answer
Explanation: Quartz crystal micro balance and surface acoustic wave sensors are used since it provides impressive sensitivity.
6. Magnetic bio sensor is wide used for ____________
a) Blood detection
b) DNA detection
c) ECG detection
d) EMG detection
View Answer
Explanation: Magnetic bio sensors are used for DNA detection.
7. QCM stands for _______________
a) Quartz crystal micro balance
b) Quality control balance
c) Quartz crystal magnifier
d) None of the mentioned
View Answer
Explanation: QCM stands for Quartz crystal micro balance which uses quartz crystals.
8. Changes in resonant frequency of QCM is proportional to _____________
a) Mass accumulated in crystal
b) Crystal used
c) Time of usage
d) None of the mentioned
View Answer
Explanation: Deposition of a thin film on crystal surface causes change in the resonant frequency of device.
9. BAW stands for __________________
a) Bulk acoustic wave
b) Barrier acoustic wave
c) Barrier avoiding wave
d) Bulk activated wave
View Answer
Explanation: BAW stands for Bulk acoustic wave.
10. Non contacting type bio sensors are ____________
a) Radiation type
b) Electromagnetic type
c) Radiation or electromagnetic type
d) None of the mentioned
View Answer
Explanation: Bio sensors may be contacting or non contacting type. Non contacting type sensors may be electromagnetic or radiation type.
Sanfoundry Global Education & Learning Series – Instrumentation Transducers.
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