Deck 6: Biomedical Instrumentation and Measurements

Question 1

If the gain at center frequency is 10, find the quality factor of narrow band-pass filter

A)1
B)2
C)3
D)None of the mentioned

Answer 1

3

Question 2

The advantage of narrow band-pass filter is

A)fc can be changed without changing gain
B)fc can be changed without changing bandwidth
C)fc can be changed without changing resistors
D)All of the mentioned

Answer 2

All of the mentioned

Question 3

Which of the following is the technique of analyzing the electrical activity of the heart by obtaining ECG's?

A)VCG
B)EEG
C)EMG
D)PCG

Answer 3

VCG

Question 4

Vectorcardiogram displays the electrical events in perpendicular axes.

A)one
B)two
C)three
D)four

Question 5

is a vectorial representation of the distribution of electric potentials generated by heart.

A)EEG
B)ECG
C)PCG
D)VCG

Question 6

How many loops each vectorcardiogram exhibits?

A)one
B)two
C)three
D)four

Question 7

Which of the following instrument is used for recording the sounds connected with the pumping action of the heart?

A)ECG
B)VCG
C)PCG
D)EEG

Question 8

Which instrument is used for clinical detection of heart sounds?

A)Stethoscope
B)Endoscope
C)Anoscope
D)Proctoscope

Question 9

Who provides a recording of waveforms of heart sounds?

A)Electrocardiograph
B)Vectorcardiograph
C)Phonocardiograph
D)Electromyograph

Question 10

What is the frequency range of sound generated from the closure of the mitral and tricuspid valve?

A)0 to 30 Hz
B)30 to 100 Hz
C)100 to 1000 Hz
D)above 1000 Hz

Question 11

Which of the following microphone is used for recording phonocardiograms?

A)Contact Microphone
B)Shotgun Microphone
C)Handheld Microphone
D)Lapel Microphone

Question 12

What is the frequency range of sound produced at the closure of aortic and pulmonic valves?

A)less than 0 Hz
B)0 to 30 Hz
C)30 to 100 Hz
D)above 100 Hz

Question 13

What is the thickness of the new acoustic sensor?

A)0.25 mm
B)0.5 mm
C)1.0 mm
D)1.5 mm

Question 14

Who described the new acoustic sensor?

A)Golden et al
B)Rijn et al
C)Levkov et al
D)Kassal et al

Question 15

Acoustic sensor principal sensing component is made up of which polymer?

A)PEO(Poly-ethylene oxide)
B)PET(Poly-ethylene tetraphthalate)
C)PVDF(Poly-vinylidene fluoride)
D)PS(Poly-styrene)

Question 16

What is the frequency range of amplifier used for a phonocardiograph?

A)less than 0 Hz
B)0 to 20 Hz
C)20 to 2000 Hz
D)above 2000 Hz

Question 17

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

Question 18

EMG is recorded by using surface electrodes.

Question 19

Whose measurements are important for myoelectric control of prosthetic devices?

A)VCG
B)ECG
C)EEG
D)EMG

Question 20

What is used to display EMG waveforms?

A)Cathode Ray Oscilloscope
B)Analog storage Oscilloscope
C)Digital Oscilloscope
D)Dual-beam Oscilloscope

Question 21

The amplitude of EMG signals depend upon which of the following factor?

A)Respiration
B)Position of electrode
C)Blood Resistivity
D)Ventricular Volume

Question 22

What is the typical range of EMG signals?

A)0.025 to 0.050 mV
B)0.050 to 0.1 mV
C)0.1 to 0.5 mV
D)0.5 to 1 mV

Question 23

EMG instrument contain frequency component extending up to Khz.

A)1
B)5
C)10
D)15

Question 24

What is included in the system to facilitate playback and study of EMG sound waveforms at a later convenient time?

A)Preamplifier
B)Oscilloscope
C)Tape Recorder
D)Ground Electrode