🧪 Biomedical MCQ Quiz Hub

1. Which of the following instrument records the electrical activity of the heart?
VCG(Vectorcardiograph)
PCG(Phonocardiograph)
ECG(Electrocardiograph)
EEG

2. Electrocardiography are used in catheterization laboratories, coronary care units and for routine diagnostic applications in cardiology.
True
False

3. Who provides valuable information about a wide range of cardiac disorders?
VCG
ECG
PCG
EEG

4. What is diagnostically useful frequency range?
0.025 to 0.05 Hz
0.05 to 150 Hz
150 to 200 Hz
0.05 to 150 MHz

5. Which machines CMRR is of order of 100-120 dB?
VCG
PCG
EEG
ECG

6. How many paper speeds are necessary for ECG recording?
One
Minimum two
Can be any
Max two

7. Where are potentials picked up by patient electrodes taken to?
Lead Selector switch
Preamp
Power Amplifier
Instrumentational amplifier

8. How lead selector selects electrodes?
one by one
two by two
three by three
four by four

9. The amplified output signal is picked up single-ended from preamp and is given to the _________
Power Amplifier
Lead Selector
Pen Motor
Paper motor

10. Why is preamplifier used?
For Amplification
For Stabilizing effect
For Reducing effect
For Modifying effects

11. ‘Stand by’ mode of operation is generally provided in which instrument?
VCG
PCG
ECG
EMG

12. ________ are made horizontally on electrocardiogram.
Time Measurements
Heart Rate Measurements
Time Measurements and Heart Rate Measurements
Not fixed and can be any thing

13. What is paper recording speed for routine work?
10 mm/s
15 mm/s
20 mm/s
25 mm/s

14. What measurements are made vertically on electrocardiogram?
Time Measurements
Heart Rate Measurements
Amplitude Measurements
Time Measurements and Heart Rate Measurements

15. What is sensitivity of an electrocardiograph?
10 mm/mV
15 mm/mV
20 mm/mV
25 mm/mV

16. Which of the following is the technique of analyzing the electrical activity of the heart by obtaining ECG’s?
VCG
EEG
EMG
PCG

17. Vectorcardiogram displays the electrical events in __________ perpendicular axes.
one
two
three
four

18. ___________ is a vectorial representation of the distribution of electric potentials generated by heart.
EEG
ECG
PCG
VCG

19. How many loops each vectorcardiogram exhibits?
one
two
three
four

20. Which of the following instrument is used for recording the sounds connected with the pumping action of the heart?
ECG
VCG
PCG
EEG

21. Which instrument is used for clinical detection of heart sounds?
Stethoscope
Endoscope
Anoscope
Proctoscope

22. Who provides a recording of waveforms of heart sounds?
Electrocardiograph
Vectorcardiograph
Phonocardiograph
Electromyograph

23. What is the frequency range of sound generated from the closure of the mitral and tricuspid valve?
0 to 30 Hz
30 to 100 Hz
100 to 1000 Hz
above 1000 Hz

24. Which of the following microphone is used for recording phonocardiograms?
Contact Microphone
Shotgun Microphone
Handheld Microphone
Lapel Microphone

25. What is the frequency range of sound produced at the closure of aortic and pulmonic valves?
less than 0 Hz
0 to 30 Hz
30 to 100 Hz
above 100 Hz

26. What is the thickness of the new acoustic sensor?
0.25 mm
0.5 mm
1.0 mm
1.5 mm

27. Who described the new acoustic sensor?
Golden et al
Rijn et al
Levkov et al
Kassal et al

28. Acoustic sensor principal sensing component is made up of which polymer?
PEO(Poly-ethylene oxide)
PET(Poly-ethylene tetraphthalate)
PVDF(Poly-vinylidene fluoride)
PS(Poly-styrene)

29. What is the frequency range of amplifier used for a phonocardiograph?
less than 0 Hz
0 to 20 Hz
20 to 2000 Hz
above 2000 Hz

30. PCG amplifiers usually have gain compensation circuits to increase the amplification of high frequency signals, which are usually of low intensity.
True
False

31. Which of the following instrument is used for recording the electrical activity of the muscles?
ECG
EMG
PCG
EEG

32. EMG is recorded by using surface electrodes.
True
False

33. Whose measurements are important for myoelectric control of prosthetic devices?
VCG
ECG
EEG
EMG

34. What is used to display EMG waveforms?
Cathode Ray Oscilloscope
Analog storage Oscilloscope
Digital Oscilloscope
Dual-beam Oscilloscope

35. The amplitude of EMG signals depend upon which of the following factor?
Respiration
Position of electrode
Blood Resistivity
Ventricular Volume

36. What is the typical range of EMG signals?
0.025 to 0.050 mV
0.050 to 0.1 mV
0.1 to 0.5 mV
0.5 to 1 mV

37. EMG instrument contain frequency component extending up to ____________ Khz.
1
5
10
15

38. What is included in the system to facilitate playback and study of EMG sound waveforms at a later convenient time?
Preamplifier
Oscilloscope
Tape Recorder
Ground Electrode

39. What is necessary for providing a common reference for measurement?
active electrode
ground electrode
tape recorder
oscilloscope

40. Which of the following interpreter can diagnose various muscular disorders by listening to the sounds produced when the muscle potentials are fed to loudspeaker?
EEG
ECG
VCG
EMG

41. What is the diameter of silver electrodes in the amplifier circuit of Johnson et al?
2 mm
4 mm
6 mm
10 mm

42. What should be CMRR of preamplifier upto 5 Khz?
10 dB
30 dB
90 dB
greater than 90 dB

43. Modern EMG machines are PC based.
True
False

44. EMG instrument is useful for making study of ___________
cardiovascular function
neuromuscular function
nervous function
Immune function

45. Which of the following instrument is used for making a study of reflex responses?
EEG
ECG
VCG
EMG

46. Which of the following instrument is used for recording the electrical activity of the brain?
ECG
EMG
PCG
EEG

47. EEG electrodes are larger in size than ECG electrodes.
True
False

48. _______ is the superimposed wave of neuron potentials operating in a non-synchrronized manner in a physical sense.
VCG
ECG
EEG
PCG

49. Which of the following is material is used to improve electrical contact?
Silver Tungsten
Electrode jelly
Silver Graphite
Copper Tungsten

50. Whose electrodes give high skin impedance as compared to ECG?
VCG
PCG
EMG
EEG