Pic 4002
Medical electronics Mcq
Note - Only a part of the
syllabus is covered in the site
This set of Biomedical
Instrumentation Multiple Choice Questions & Answers (MCQs) focuses on
“Recording Electrodes”.
1. Electrodes make a
transfer from the __________ in the tissue to the electronic conduction which
is necessary to make measurements.
a) electronic conduction
b) ionic conduction
c) electric conduction
d) impulsive conduction
View Answer
Answer: b
Explanation: Electrodes make an exchange from the ionic conduction in the
tissue to the electronic conduction which is important to make measurements. An
electrolytic paste is applied between the electrodes and the skin to reduce
skin contact impedance. The electrolyte also facilitates ionic conduction from
the skin to the electrodes.
2. Surface electrodes
damage the living tissues.
a) True
b) False
View Answer
Answer: b
Explanation: The surface electrodes pick up the potential difference from the
tissue surface when placed over it without damaging the living tissues. They
are placed above the skin and cause no harm to the living tissues. They capture
the electrical activities of bunch of tissues together.
3. Deep-seated
electrodes indicates the electric potential difference arising ________ the
living tissues or cells.
a) inside
b) outside
c) around
d) adjacent
View Answer
Answer: a
Explanation: Deep-seated electrodes indicate the electric potential difference
arising inside the living tissues or cells. Surface electrodes indicates the
electric potentials arising outside the living tissues that is on the surface
of the skin. Needle electrodes are example of deep seated electrodes.
4. Impedance
pneumography is a commonly-used technique to monitor a person’s _______
a) respiration rate
b) heart rate
c) pulse rate
d) skin impedance
View Answer
Answer: a
Explanation: Impedance pneumography is a commonly-used technique to monitor a
person’s respiration rate, or breathing rate. It is implemented by using two
electrodes or four electrodes. Skin impedance is the resistance between the
skin and the electrode. Heart rate measurement is called ECG.
5. Electrode paste
____________
a) increases contact impedance
b) equates contact impedance
c) reduces contact impedance
d) absorbs contact impedance
View Answer
Answer: c
Explanation: In order to obtain a clearly established contact (low contact
impedance) an electrolyte or electrode paste is usually employed as an
interface between the electrode and the surface of the source of the event. It
is placed between the skin and the electrode. It helps to get better signal
acquisition.
6. All electrode
potentials are measured with respect to which reference electrode?
a) hydrogen electrode
b) platinum electrode
c) calomel electrode
d) hydrogen absorbed on platinum electrode
View Answer
Answer: d
Explanation: All electrode potentials are measured with respect to a reference
electrode, usually that of hydrogen absorbed on platinum black. Thus,
considering potential of hydrogen absorbed on platinum electrode to be zero,
other all have positive of negative potentials.
7. What is the
frequency range of ECG?
a) 70-120 Hz
b) 0.05-120 Hz
c) 5-120 Hz
d) 12-120 Hz
View Answer
Answer: b
Explanation: Primary signal characteristics of ECG are:
Frequency range: 0.05-120 Hz.
Signal amplitude: 0.1-5 mV.
Typical signal: 1mV.
8. What is the signal
amplitude of EEG?
a) 2-200 µV
b) 2-200mV
c) 2-2000 µV
d) 2-2000mV
View Answer
Answer: a
Explanation: The signal amplitude of EEG is between 2-200 µV. It is very small
and requires special type of electrodes namely scalp electrodes. EEGs are
difficult to capture because its signal range in very small and motion
artifacts are much greater.
9. Needle electrode is
used to measure ____________
a) EKG
b) EEG
c) EOG
d) EMG
View Answer
Answer: d
Explanation: EMG stands of Electromyogram. For recording action potential for
individual motor units of muscle fiber, needle electrodes are used for better
diagnostic information. These electrodes fall in the category of deep seated
electrodes.
10. From equipment
point of view, the respiratory system in the human body is a _________ system.
a) hydraulic
b) pneumatic
c) mechanical
d) electrical
View Answer
Answer: b
Explanation: Respiratory system is a pneumatic system in which an air pump
(diaphragm) alternately creates negative and positive pressures in a sealed
chamber (thoracic cavity) and causes air to be sucked into and forced out of a
pair of elastic bags (lungs). Blood circulatory system is related to hydraulic
system.
11. Off-set potential
is _____________
a) difference in half-cell potentials between two electrodes
b) sum of half-cell potentials between two electrodes
c) average of half-cell potentials between two electrodes
d) complement of half-cell potentials between two electrodes
View Answer
Answer: a
Explanation: The difference in half cell potential that exists between two
electrodes is called off-set potential. The differential amplifies used to
measure potentials between two electrodes are generally designed to cancel the
electrode offset potential so that only the signals of interest are recorded.
12. Which of the
following is not preferred for electrode making?
a) Ag-AgCl
b) Copper
c) Stainless-steel
d) Gold
View Answer
Answer: c
Explanation: Stainless steel in contact with a saline electrolyte produce a
potential difference of 10 mV between the electrodes which is much more than
the limit (i.e 2.5 mV). Ad-AgCl electrodes give almost noise free
characteristics. They are also found to be acceptable from the point of view of
long term drift.
13. Which of the
following statement is false about polarizable electrodes?
a) they are made using stainless steel
b) used for recording resting ECG
c) retain a residual charge when exposed to large pulse of energy
d) can transmit small bioelectric signals even after getting exposed to large
pulse of energy
View Answer
Answer: d
Explanation: Polarizable electrodes usually employ stainless steel and are used
for resting ECG or other situations where there is small likelihood that the
electrode would be exposed to a large pulse of energy (such as defibrillation
discharge) in which case they would retain a residual charge, become polarized,
and will no longer transmit the relatively small bioelectric signals, thus
become useless.
14. Which electrodes
can work even after being induced to large electric discharge such as
defibrillation?
a) polarizing electrodes
b) magnetic electrodes
c) non-polarizing electrodes
d) electrolytic electrodes
View Answer
Answer: c
Explanation: Non-polarizing electrodes are designed to rapidly dissipate any
charge imbalance induced by powerful electric discharges such as a
defibrillation procedure. Rapid depolarization enables the immediate
reappearance of bioelectric signals on the monitor after defibrillation. For
this reason, non-polarizing electrodes have become the electrodes of choice for
monitoring in the intensive care units and stress testing procedures.
Biomedical transducers and amplifiers
1. Bioelectric
potentials are generated at a __________and the source of these potentials is
ionic in nature
a. High
level
b. Low
level
c. cellular
level
d. None of
these
Answer: C.
cellular level
2. Human
cells may vary from_____________ in diameter
a. 1
micron to 10 microns
b. 10
micron to 100 microns
c. 10
micron to 50 microns
d. 1
micron to 100 microns
Answer: D. 1
micron to 100 microns
3. Source
of bioelectric potential is _____________in nature
a. ionic
b. electrical
c. electronics
d. mechanical
Answer: A. ionic
4. The
principal ion that is not involved with the phenomena of producing cell
potentials is
a. sodium
b. hydrogen
c. potassium
d. None of
these
Answer: B.
hydrogen
5. What is
the relatively static membrance potential of quiescent cells called?
a. action
cell potential
b. half-cell
potential
c. cell
potential
d. resting
membrane potential
Answer: D.
resting membrane potential
6. The
variation of the electrical potential associated with the passage of a pulse
along the membrane of a muscle cell or nerve cell is called
a. muscle
potential
b. action
potential
c. resting
potential
d. half
-cell potential
Answer: B. action
potential
7. The Bio
signal frequencies from various sections of the human body are in the
a. RF
frequency range
b. Microwave
range
c. 0 to
few kHz
d. Few kHz
to few MHz
Answer: C. 0 to
few kHz
8. The EEG
signals are originated from the
a. Glia
cells
b. Motor
units
c. Sino
atrial node
d. Acetylcholine
Answer: A. Glia
cells
9. The
bundle of muscle fibers in a muscle supplied by a signal motor nerve fiber
called a
a. Motor
unit
b. Purkinje
fiber system
c. Bundle
of His
d. Muscle
spindle
Answer: A. Motor
unit
10. The bio
electric generator of heart is situated at
a. Aortic
value
b. SA node
c. AV node
d. The
brain
Answer: B. SA
node
11. The
most abundant negative ions in our body are
a. Sulphates
b. borates
c. chlorides
d. chlorates
Answer: C.
chlorides
12. Amoung
the following electrodes, which have high Zi?
a. Surface
electrodes
b. Needle
electrodes
c. Micro
electrodes
d. Disc
electrodes
Answer: C. Micro
electrodes
13. In the
case of ERG, what types of electrodes used to pickup signals?
a. Disc
electrodes
b. Retinal
electrodes
c. Vacuum
type electrodes
d. pH
electrodes
Answer: B.
Retinal electrodes
14. Loud
speaker is also used in the recorder of
a. EMG
b. ECG
c. EOG
d. EEG
Answer: A. EMG
15. Pressure
transducer for measuring blood pressure is from
a. Strain
gauge transducer only
b. Strain gauge
or capacitive transducer
c. Resistive
transducer
d. Fiber
optic sensor
Answer: B. Strain
gauge or capacitive transducer
16. The
hydrogen ion concentration of the blood is most easily determined with a
a. Surface
electrodes
b. Needle
electrodes
c. differential
amplifier
d. glass
electrode
Answer: D. glass
electrode
17. Amoung
the contact media like Alcohol, Electrode pastes, Saline and multipoint
electrode , which has the lowest impedance at 1 Hz?
a. Alcohol
b. Electrode
paste
c. Saline
d. Multipoint
electrode
Answer: D.
Multipoint electrode
18. To
obtain good contact between the electrode and the skin the gap is filled with
an electrode paste containing
a. electrolytes
b. wax
c. glycerene
d. iodine
Answer: A.
electrolytes
19. The
magnitude of the polarisation for a given electrode material is dependent
primarily on the
a. shape
of electrode
b. current
density at the surface of contact between electrode and tissue
c. impedance
of the electrode
d. half
-cell potential
Answer: B.
current density at the surface of contact between electrode and tissue
20. The
active transducer in the measurement of pressure is
a. Piezoelectric
transducer
b. Capacitive
transducer
c. Strain
gauge
d. Inductive
transducer
Answer: A.
Piezoelectric transducer
21. The
amplifier which has no drift is
a. Differential
amplifier
b. D.C
amplifier
c. Signal
ended amplifier
d. Chopper
amplifier
Answer: D.
Chopper amplifier
22. The
improper response time of the amplifier in the biomedical recorders
a. affects
the gain of the amplifier
b. delays
the signals
c. changes
the shape of the waveform of the signal
d. attenuates
the signals
Answer: C. changes
the shape of the waveform of the signal
23. To
reduce common mode interference dyring recording of biosignals one can use
a. buffer
amolifier
b. differential
amplifier
c. single
ended amplifier
d. Chopper
amplifier
Answer: B.
differential amplifier
24. Resistively
generated interference arises through incorrect
a. grounding
b. current
density at the electrodes
c. supply
voltage
d. input
impedance
Answer: A.
grounding
25. CMRR is
more in
a. Single
ended amplifier
b. differential
amplifier
c. Inverting
operational amplifier
d. Chopper
amplifier
Answer: B.
differential amplifier
26. For
biomedical applications, the mostly used amplifier is
a. Single
ended amplifier
b. differential
amplifier
c. Inverting
operational amplifier
d. Chopper
amplifier
Answer: B.
differential amplifier
27. The use
of notch filter in signal conditioning system is
a. to
filter R.F.noise
b. to
filter 50 Hz noise from mains
c. to
filter the signal from various noises
d. to
attenuate the evoked response potentials
Answer: B. to
filter 50 Hz noise from mains
28. EMG
deals with the
a. Study
of brain activity
b. Study
of Myocardial activity
c. Study
of Muscular activity
d. Study
of Central nervous system
Answer: C. Study
of Muscular activity
29. Mingographs
are connected with
a. EEG
b. ECG
c. ERG
d. EMG
Answer: B. ECG
30. Wax
coated graph sheets are used for recording. why?
a. To
write easily
b. To avoid
spreading of ink
c. To
improve the contrast
d. To make
good appearance
Answer: B. To
avoid spreading of ink
31. The
roof cardio denotes heart. The heart muscle is therefore called the
______________________ cardium
a. cyto
b. endo
c. myo
d. intra
Answer: C. myo
32. Information
is transmitted through the axon by means of short pulses of constant amplitude
in accordance with the output of the electronic circuits called
a. Rectifier
b. Monostable
and flip flop
c. Delay
circuits
d. Memory
circuits
Answer: B.
Monostable and flip flop
33. The
heart sounds are recorded by
a. Electro
cardiography
b. Endoscope
c. Phono
cardiography
d. Angio
cardiography
Answer: C. Phono
cardiography
34. The
heart sounds are registered by a recorder having an upper frequency limit of at
least
a. 50 Hz
b. 200 Hz
c. 300 Hz
d. 500 Hz
Answer: D. 500 Hz
35. The
hearts dipole field is measured by lead system called
a. Wilson
lead system
b. Orthogonal
lead system
c. Vector
lead system
d. 32
electrode system
Answer: B.
Orthogonal lead system
36. Arrhythmia
can be diagnosed by
a. EEG
b. EOG
c. Vector
cardiogram
d. Phono
cardiography
Answer: B. EOG
37. Adams
stokes attacks can be successfully treated with a
a. Defibrillator
b. Nerve
stimulator
c. Artificial
heart valve
d. Pacemaker
Answer: D.
Pacemaker
38. The T
wave is produced during
a. atrial
depolarisation
b. atrial
repolarisation
c. repolarisation
of the ventricles
d. depolarisation
of the ventricles
Answer: C.
repolarisation of the ventricles
39. Bicycle
ergometer is related with
a. ECG
b. EMG
c. ERG
d. EEG
Answer: A. ECG
40. For
faithfully reproduction of QRS complex of ECG signal, an amplifier band width
should be
a. 0-2000
Hz
b. 0.05-100
Hz
c. 1 -100
Hz
d. 10-100
Hz
Answer: B.
0.05-100 Hz
41. In
order to ground the patient more effectively during recording of ECG, an
auxiliary amplifier is connected in a____________circuit so that the patient is
actively driven to ground potential and drives the body to zero common mode
voltage
a. positive
feedback
b. clipping
c. differentiator
d. negative
feedback
Answer: D.
negative feedback
42. In ECG,
the calibration signal amplitude is
a. 1 mV
b. 1 V
c. 10 mV
d. 10 V
Answer: A. 1 mV
43. Artifacts
are
a. skin
crafts
b. time
varying half cell potentials
c. radio
capsules
d. radio
noises
Answer: B. time
varying half cell potentials
44. The
resting potential of the inside of the neuron is about
a. 70 mV
b. 1 mV
c. -70 mV
d. -1 mV
Answer: C. -70 mV
45. ECG
waves include frequency content ranging from
a. less
than 1Hz to 50 Hz
b. dc to
2000 Hz
c. 10 Hz
to 1000 Hz
d. 0.05 Hz
to 2 kHz
Answer: A. less
than 1Hz to 50 Hz
46. In the
case of EEG with unipolar leads, the potential of each electrodes is measured
with respect to
a. adjacent
electrode
b. indifferent
electrode
c. forehead
electrode
d. ground
Answer: B.
indifferent electrode
47. The
conduction velocity in a motor nerve is normally
a. 100 m/s
b. 50m/s
c. 40 m/s
d. 80 m/s
Answer: B. 50m/s
48. The
level of consciousness can be followed by means of the
a. EEG
b. ECG
c. EMG
d. ERG
Answer: A. EEG
49. The
frequency of the action potential in the relaxed muscle is
a. 20 Hz
b. 50 Hz
c. 0 Hz
d. 60 Hz
Answer: C. 0 Hz
50. In
contraction of a skeletal muscle , action potentials are generated in the
a. Motor
unit
b. Nerve
lesion
c. Skeletal
muscle
d. Brain
Answer: A. Motor
unit
51. A
continuous signal analysis over long periods of time can be performed by
frequency analysis with the aid of
a. fourier
auto correlation
b. band
pass filters
c. chopper
amplifiers
d. memory
storage devices
Answer: B. band
pass filters
52. Recording
of the peripheral nerves action potentials is called
a. Electromyography
b. Electro
cortincography
c. Electro
neurography
d. Electro
nervegraphy
Answer: C.
Electro neurography
53. An
epileptic attack can be induced in a normal person by means of
a. exposing
bright light
b. Walking
along the road during sunny day
c. hearing
thunder
d. an
electric shock
Answer: D. an
electric shock
54. High
frequency response more than 150 Hz can be obtained in
a. X-Y
recorder using a pen drive
b. Strip
chart recorder using a pen drive
c. Mingography
using an ink jet
d. Moving
iron based recorder
Answer: C.
Mingography using an ink jet
55. During
Myocardial Infarction, one can use
a. Pacemaker
b. Heart
lung machine
c. Nerve
stimulator
d. Kidney
Machine
Answer: A.
Pacemaker
56. Inflammation
of the kidneys is called
a. otitis
b. hepatitis
c. rephritis
d. Toxemia
Answer: C.
rephritis
57. In the
case of defibrillator, a double square pulse type is used to
a. restart
the heart rhythm after the open heart surgery
b. arrest
ventricular fibrillation
c. arrest
leakage of blood from the heart
d. arrest
the reverse flow of blood from ventricule to artrium
Answer: A.
restart the heart rhythm after the open heart surgery
58. In
direct current defibrillator, a pulse with a duration of about 5 ms is
generated by means of a
a. Astable
multivibrator
b. Monostable
multivibrator
c. Clock
IC 555
d. Capacitor
discharge
Answer: D.
Capacitor discharge
59. To
produce ventricular contraction with an electric pulse, the minimum energy
required is
a. 10 μJ
b. 1J
c. 10 mW
d. 1 W
Answer: A. 10 μJ
60. Suppose
the pacemaker pulse has high energy and occurs during the vulnerable part of
the T wave then the heart is in
a. normal
state
b. atrial
fibrillation
c. ventricular
fibrillation
d. low
pressure
Answer: C.
ventricular fibrillation
61. The
commonest source of energy for pacemaker is the
a. mercury
battery
b. the
ordinary dry cell
c. nuclear
battery
d. low
pressure
Answer: A.
mercury battery
62. Because
of the risk of electromagnetic interference , pacemaker patients should not be
given
a. cancer
treatment
b. diathermy
treatment
c. saline
water
d. the
rooms with fans
Answer: B.
diathermy treatment
63. In the
case of stable total AV block , a pacemaker is chosen
a. with
constant frequency
b.
c. that is
atrial synchronous
d. with
variable frequency and synchronisation with ventricular action
Answer: A. with
constant frequency
64. After
the chest operation , the patient feels difficult to breathe. Then the patient
is connected to a
a. Pacemaker
b. defibrillator
c. ventilator
d. heart
lung machine
Answer: C.
ventilator
65. The
apparatus used for extra corporeal circulation of blood is called
a. heart
lung machine
b. ventilator
c. dialyser
d. Pacemaker
Answer: A. heart lung
machine
66. During
open heart surgery, the operation time can be increased by
a. giving
more anesthesia
b. connecting
a pacemaker
c. connecting
a ventilator
d. inducing
hypothermia
Answer: D.
inducing hypothermia
67. Most
blood pumps use the principle of
a. peristaltic
compression
b. centrifuge
c. compression
d. normal
acceleration
Answer: A.
peristaltic compression
68. To
reduce hemolysis, the blood pump design should provide a flow that minimises
a. oxygen
tension
b. turbulence
c. body
temperature
d. continuous
flow
Answer: B.
turbulence
69. The obstruction
of blood flow is known as
a. cyanosis
b. edema
c. hyperemia
d. stasis
Answer: D. stasis
70. Amoung
the following things which have the highest attenuation of ultrasound?
a. Blood
b. Bone
c. Fat
d. Muscle
spindle
Answer: B. Bone
71. It is
known that the mean velocity of the blood flow in the aorta whose is about
10.5mm is about 40 cm/sec. The ultrasonic velocity in the blood is 1550 m/sec.
When an ultrasound of frequency of 3 MHz, what is the order of magnitude of
Doppler shift in frequency?
a. 1550 HZ
b. 2550 Hz
c. 3550 Hz
d. 550 Hz
Answer: A. 1550
HZ
72. Too low
a blood pressure is known as
a. hypertension
b. hypothalamus
c. hypotension
d. vasodilation
Answer: C.
hypotension
73. The
normal pH of the blood is
a. 7
b. 7.4
c. 7.8
d. 7.6
Answer: B. 7.4
74. By
listening over the heart with a stethoscope and palpating the arterial pulse in
the wrist of an adult, the time delay between systole and the pulse wave in the
wrist is about
a. 1 sec
b. 1 min
c. 0.2 sec
d. 0.4 sec
Answer: C. 0.2
sec
75. Blood
flow can be measured using the electromagnetic principle because blood has a
high
a. magnetic
induction
b. electrical
resistivity
c. electrical
conductivity
d. impedance
Answer: C.
electrical conductivity
76. To
avoid electrode polarisation and bio-potential artifacts, electromagnetic blood
flowmeters are using
a. a.c.
magnetic fields
b. d.c.
magnetic fields
c. d.c
current
d. circular
magnets
Answer: A. a.c.
magnetic fields
77. In
addition to measuring mean flow speed of the blood, the pulsed Doppler
ultrasonic blood flowmeter also displays
a. size of
the blood vessel
b. number
of red cells per unit volume
c. electrical
conductivity
d. velocity
profile
Answer: D.
velocity profile
78. The
average valus of systolic and diastolic pressures of normal adult are
a. 80 mm
Hg and 120 mm Hg
b. 120 mm
Hg and 80 mm Hg
c. 80 mm
Hg and 140 mm Hg
d. 70 mm
Hg and 120 mm Hg
Answer: B. 120 mm
Hg and 80 mm Hg
79. Blood
plasma is obtained by_______blood that has been prevented from coagulating
a. centrifuging
b. heating
c. mixing
water with
d. cooling
Answer: A.
centrifuging
80. Fluoroscopic
observation of cardiac catheterization is made by
a. Fiber
Endoscope
b. Echo
cardiography
c. Electrocardiograms
d. X-ray
imaging
Answer: D. X-ray
imaging
81. The
concentration of sodium , potassium and calcium ions in blood is determined by
a. Flame
photometry
b. pH
meter
c. Blood
gad analyser
d. Ultrasonic
Doppler Velocity meter
Answer: A. Flame
photometry
82. The
radio activity taken up is measured by means of
a. PIN
diode detector
b. Thermal
detector
c. Scintillation
detector
d. IR
detector
Answer: C.
Scintillation detector
83. Intensive
care unit is used to maintain vital functions
a. temporarily
b. permanently
c. in the
resting state
d. in the
normal conditions upto the patients life time
Answer: A.
temporarily
84. In
dialysis the waste products are transferred to the dialysate by
a. surface
tension
b. centrifuge
c. diffusion
d. viscosity
variation
Answer: C.
diffusion
85. Radio
capsule is
a. an
encapsulated radio receiver
b. a
system emitting radio active radiations
c. an
encapsulated bio signal transmitter
d. a
medicine for treatment of cancer
Answer: C. an
encapsulated bio signal transmitter
86. In
Biotelemetry, FDM refers to
a. Frequency
Division Modulation
b. Fourier
Domain Modulation
c. Frequency
Division Multiplexing
d. Fesimle
Distance Modulation
Answer: C.
Frequency Division Multiplexing
87. The
radiocapsules are
a. some
kind of treatment to reduce brain activity
b. drugs
to reduce ventricular fibrillation
c. biotelemetry
transmitter
d. used for
animals to cure tumors
Answer: C.
biotelemetry transmitter
88. The
term Bionics means
a. a
science concerned with the application of data about the functioning of
biological systems to the solution of engineering problems
b. the
biofeedback instrumentation
c. the bioelectronic
system
d. the
indirect controlling of the activity of the automatic nervous system through
feedback
Answer: A. a
science concerned with the application of data about the functioning of
biological systems to the solution of engineering problems
89. An endoscope
is an instrument for examining
a. a body
cavity
b. the
cancer cells
c. blood
gflow rates
d. the
head surfaces
Answer: A. a body
cavity
90. With a
proctoscope the rectum
a. can be
viewed
b. can not
be viewed
c. can be
viewed provided, with some modifications as such as condition monoculas
d. can be
treated therapeutically
Answer: A. can be
viewed
91. In the
B.Scan, When the transducer is moved with respect to the body, which part of
the CRO is synchronised with this movement?
a. Time
base
b. Vertical
deflection potential
c. Brightness
control
d. Filament
voltage
Answer: B.
Vertical deflection potential
92. In the
flexible fiberoscopes, the images are transmitted through
a. coaxial
cables
b. electrical
pulses
c. optical
fibers
d. glass
pipes
Answer: C.
optical fibers
93. Otoscope
is an instrument which is used to
a. inspect
the ear drum
b. inspect
the stomach
c. inspect
the thorax
d. inspect
the abdominal cavity
Answer: A.
inspect the ear drum
94. Thermography
is the display of
a. Thermal
images of the skin surfaces
b. thermal
images of the internal organs like heart
c. skin
surfaces using photography
d. skin
temperatures using fiber optic sensors
Answer: A.
Thermal images of the skin surfaces
95. The
sensitivity of the thermography in the case of diagnosis of the breast cancer can
be increased by
a. irradiating
the tumor surface by X-rays
b. irradiating
the tumor surface by Gamma rays
c. irradiating
the tumor surface by ultraviolet rays
d. irradiating
the tumor surface by microwaves
Answer: D.
irradiating the tumor surface by microwaves
96. The
efficiency of X-rays machines is about
a. 0.8
b. 0.5
c. 0.2
d. about
1%
Answer: D. about
1%
97. The
detailed X-ray images of the slices of the body is obtained by means of
a. computerized
axial tomography
b. fluoroscopy
c. MRI
d. scintillation
detector arrays
Answer: A.
computerized axial tomography
98. In
diagnostic radiology a shadow image is obtained. In ultrasonic diagnosis we are
getting
a. full
image of the structure
b. sectional
images
c. surface
images
d. linear
images
Answer: B.
sectional images
99. The
polymeric material used for the preparation of artificial heart valve is
a. polyvinyl
chloride
b. teflon
c. polyisopropyl
d. polyethelene
Answer: B. teflon
100.
The sectional ultrasonic images are known as
a. ultrasonic
tomograms
b. ultrasonic
echograms
c. ultrasonic
nomograms
d. ultrasonic
tomography
Answer: A.
ultrasonic tomograms
101.
The cardiovascularsystem is a complex closed
a. pnematic
system
b. Electric
system
c. Hydralic
system
d. All of
the above
Answer: C.
Hydralic system
102.
Respiration is the process of supplying _______to and
removing_________ from the tissues
a. Oxygen,
carbon dioxide
b. Oxygen,
carbon monoxide
c. Oxygen,
nitrogen
d. Carbon
monoxide,oxygen
Answer: A.
Oxygen, carbon dioxide
103.
The brain consists of
a. cerebrum,cerebellum,encephalon
b. cerebellum,encephalon,hemispheres
c. cerebrum,cerebellum,spinal
nerve
d. cerebrum,cerebellum,brain
stem
Answer: D.
cerebrum,cerebellum,brain stem
104.
Bioelectric currents are due to ______ion movement within a
conductive fluid
a. Positive
b. Negative
c. positive
and negative
d. Negative
and positive
Answer: C.
positive and negative
105.
Conduction velocity in the Purkinje fibers is about
a. 1 to
2.5 m/s
b. 1.5 to
2 m/s
c. 1 to 2
m/s
d. 1.5 to
2.5 m/s
Answer: D. 1.5 to
2.5 m/s
106.
The PR interval normally lies between
a. 0.12 to
0.2 s
b. 0.1 to
0.2 s
c. 0.1 to
0.25 s
d. 1 to 2
s
Answer: A. 0.12
to 0.2 s
107.
The QRS interval,which represents the time taken by the heart
impulse to travel first through the interventricular system and then through
the free walls of the ventricles ,normally varies from
a. 0.05 to
0.10 s
b. 0.5 to
10 s
c. 0.5 to
0.10 s
d. 5 to 10
s
Answer: A. 0.05
to 0.10 s
108.
The EEG signals can be picked up with electrodes either from the
________from the cerebral cortex
a. scalp
or indirect
b. scalp
or direct
c. indirect
or scalp
d. All of
the above
Answer: B. scalp
or direct
109.
The normal EEG frequency content ranges from
a. 0.5 to
50 Hz
b. 5 to 50
Hz
c. 0.5 to
.1 Hz
d. 5 to
100 Hz
Answer: A. 0.5 to
50 Hz
110.
In voluntary contraction of the skeletal muscle potentials range
from
a. 50 mV
to 5 mV
b. 5 mV to
50 mV
c. 50 μV
to 5 mV
d. 5 μV to
50 mV
Answer: C. 50 μV
to 5 mV
111.
EMG signal characterized by ______peaks
a. Positive
b. Negative
c. Negative
to Positive
d. Positive
to negative
Answer: D.
Positive to negative
For Research methodology MCQ for Annauniversity phd enterance exam
https://v2kbusiness.blogspot.com/2022/09/research-methodology-mcq-for.html
0 Comments