Olete.in
Articles
Mock Tests
π§ͺ Biomedical MCQ Quiz Hub
Biomedical Instrumentation MCQs Set 2
Choose a topic to test your knowledge and improve your Biomedical skills
1. What are generally designed to have a very high value of input impedance to take care of high electrode impedance?
Montages
Electrodes
Preamplifiers
Filters
2. Voltage difference between an active electrode on the scalp with respect to reference electrode at ear lobe or any other part of body is known as ___________ recording.
Monopolar
Bipolar
Unipolar
Nonpolar
3. How is bipolar recording done?
Omni channel EEG
Multi channel EEG
Uni Channel EEG
Non Channel EEG
4. EEG signals picked up by surface electrodes are usually small as compared to ECG.
True
False
5. A pattern of electrodes on the head and the channels they are connected to are __________
Amplifiers
Oscilloscope
Montage
Wires
6. Where is the reference electrode placed?
nasal
cervical
forehead
facial
7. What is the typical value of the calibration signal?
10 uV/cm
30 uV/cm
50 uV/cm
70 uV/cm
8. Preamplifiers used in electroencephalograph have high gain and low noise characteristics.
True
False
9. EEG machines have notch filter sharply tuned at _______ Hz as to eliminate mains frequency interference.
10
30
50
70
10. What is the typical frequency range of standard EEG machines?
0.025 to 0.05 Hz
0.05 to 0.1 Hz
0.1 to 70 Hz
70 to 140 Hz
11. Pure-tone audiometers usually generate test tones in octave steps from ___________
125 to 800 Hz
125 to 8000 Hz
25 to 8000 Hz
15 to 800 Hz
12. Speech audiometry normally allows measurements to be made within the frequency range of _____
300β3000 Hz
30β300 Hz
300β3000 KHz
3β30K Hz
13. The signal intensity of Pure-tone audiometers ranging from ______
10 dB to +100 dB
β10 dB to -100 dB
β10 dB to +100 dB
β10 dB to +10 dB
14. The frequency range of pure-tone audiometer is more than that of speech audiometer.
True
False
15. ___________ amplifier circulatory is employed to reduce the hum noise generated by the power supply in the ECG circuit.
low pass filters
high pass filters
band pass filters
notch filters
16. The unit of sensitivity of an electrocardiograph is ________
m/mV
mm/V
mm/mV
m/V
17. The volume of blood outside the dialyzer is known as priming volume.
True
False
18. The range of CMRR of Foetal electrocardiogram is ______________ a) 0-120 dB b) 0-200 dB c) 0-150 dB d) 0- 130 dB
0-120 dB
0-200 dB
0-150 dB
0- 130 dB
19. Power Line Hum is responsible for most of common-mode interfering signal.
True
False
20. What is the role of Cupraphan in haemodialysis?
used to check conductivity of dialyzer
used as membrane
used to check blood leakage
not at all used
21. Which of the following is the property of instrumentational amplifier?
Extremely low input impedance
High bias and offset currents
Low slew rate
Very high CMRR
22. Foetal ECG signal detected via electrodes placed on motherβs abdomen is complex and requires attenuation of maternal signals for obtaining FHR.
True
False
23. The blood is a good conductor of electricity.
True
False
24. The range of FHR measurement due to substitution logic is between __________ bpm.
20-220
60-260
40-240
0-200
25. The tympanic membrane separates the ear canal from the _____________
upper ear cavity
lower ear cavity
middle ear cavity
inner ear cavity
26. The middle ear is exposed to atmospheric pressure only through the _______
eustachian tube
tympanic membrane
pinna
auditory nerve
27. The major function of the middle ear is ____________
to transfer movements of the air in the outer ear to the cochlea
to transfer movements of the air in the outer ear to the auditory nerves
to transfer movements of the air in the outer ear to the tympanic membrane
to transfer movements of the air in the outer ear to the fluid-filled chambers of the inner ear
28. The human ear responses to vibrations ranging from ___________
20KHz β 20MHz
2KHz β 20MHz
20Hz β 20KHz
2Hz β 2KHz
29. Name the bone that rests upon the lower end of the cochlea and passes the vibrations directly into the fluid within.
malleus
stapes
incus
hammer
30. Air conduction, by definition, is the transmission of sound through the external and middle ear to the internal ear.
True
False
31. The hearing threshold is an invariable fixed intensity above which sound is always heard and below which sound is never heard.
True
False
32. Unit of sound intensity ________
joules per sq. cm
watt per sq. cm
joules per cm
watt per cm
33. Sound intensity is proportional to the _________ of sound pressure.
cube
square
inverse square
inverse square root
34. Decibel expresses the logarithm of the ratio between two sound _________
intensities
powers
pressures
intensities, powers and pressures
35. What is the unit of dB?
watts per sq cm
dyne per sq cm
unit less
watts per cm
36. If I1 and I2 are two intensities in watts per square centimetre, then the number of decibels with which they are related can be expressed as _________
N = 10 log I1/I2
N = 10 log I2/I1
N = -10 log I1/I2
N = log I1/I2
37. __________ is specialized equipment, which is used for the identification of hearing the loss in individuals.
gaugemeter
tachometer
manometer
audiometer
38. Which threshold of hearing is measured by a pure-tone audiometer?
air-conduction thresholds of hearing
bone-conduction thresholds of hearing
speech reception thresholds for diagnostic purposes
air-conduction and bone-conduction thresholds of hearing
39. Speech audiometers are normally used to determine ______________
speech reception thresholds for diagnostic purposes
air-conduction and bone-conduction thresholds of hearing
bone-conduction thresholds of hearing
air-conduction thresholds of hearing
40. How many kidneys does a human have?
one
two
three
four
41. The removal of waste products from blood plasma is performed by ___________
kidney
liver
heart
lungs
42. The regulation of the composition of blood plasma is done by which of the following organ?
skin
heart
kidney
lung
43. Each kidney consists of about a million individual units, all similar in structure and function. These tiny units are called __________
nerves
neurons
capillaries
nephrons
44. Which of the following is the correct anatomical position of the kidney?
front of the abdominal cavity just below the diaphragm
back of the abdominal cavity just below the diaphragm
back of the abdominal cavity just above the diaphragm
front of the abdominal cavity just above the diaphragm
45. Each kidney consists _______ number of nephrons.
thousands
millions
billions
trillions
46. The kidneys work only on plasma.
True
False
47. The ___________ carry blood at very high pressure from the aorta into the glomerular capillary.
renal arteries
russal arteries
pulmonary arteries
fenal arteries
48. The total amount of glomerular filtrate is about ____________ per day.
180 liters
18 liters
18 ml
180 ml
49. The amount of urine formed by an average kidney in one day is ________
10-10.5 L
10-15 ml
1-1.5 L
5 L
50. Which hormone of the pituitary gland helps to automatically reabsorb water from the kidney?
Anti-diuretic hormone
Diuretic hormone
Pro-diuretic hormone
Pseudo-diuretic hormone
Submit