Olete.in – MCQs, Mock Tests & Government Job Prep | Biomedical Biomedical Instrumentation MCQs Set 2

What are generally designed to have a very high value of input impedance to take care of high electrode impedance?

1. Montages
2. Electrodes
3. Preamplifiers
4. Filters

✅ Correct Answer: 3

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.

1. Monopolar
2. Bipolar
3. Unipolar
4. Nonpolar

✅ Correct Answer: 1

How is bipolar recording done?

1. Omni channel EEG
2. Multi channel EEG
3. Uni Channel EEG
4. Non Channel EEG

✅ Correct Answer: 2

EEG signals picked up by surface electrodes are usually small as compared to ECG.

1. True
2. False
3.
4.

✅ Correct Answer: 1

A pattern of electrodes on the head and the channels they are connected to are __________

1. Amplifiers
2. Oscilloscope
3. Montage
4. Wires

✅ Correct Answer: 3

Where is the reference electrode placed?

1. nasal
2. cervical
3. forehead
4. facial

✅ Correct Answer: 3

What is the typical value of the calibration signal?

1. 10 uV/cm
2. 30 uV/cm
3. 50 uV/cm
4. 70 uV/cm

✅ Correct Answer: 3

Preamplifiers used in electroencephalograph have high gain and low noise characteristics.

1. True
2. False
3.
4.

✅ Correct Answer: 1

EEG machines have notch filter sharply tuned at _______ Hz as to eliminate mains frequency interference.

1. 10
2. 30
3. 50
4. 70

✅ Correct Answer: 3

What is the typical frequency range of standard EEG machines?

1. 0.025 to 0.05 Hz
2. 0.05 to 0.1 Hz
3. 0.1 to 70 Hz
4. 70 to 140 Hz

✅ Correct Answer: 3

Pure-tone audiometers usually generate test tones in octave steps from ___________

1. 125 to 800 Hz
2. 125 to 8000 Hz
3. 25 to 8000 Hz
4. 15 to 800 Hz

✅ Correct Answer: 2

Speech audiometry normally allows measurements to be made within the frequency range of _____

1. 300–3000 Hz
2. 30–300 Hz
3. 300–3000 KHz
4. 3–30K Hz

✅ Correct Answer: 1

The signal intensity of Pure-tone audiometers ranging from ______

1. 10 dB to +100 dB
2. –10 dB to -100 dB
3. –10 dB to +100 dB
4. –10 dB to +10 dB

✅ Correct Answer: 3

The frequency range of pure-tone audiometer is more than that of speech audiometer.

1. True
2. False
3.
4.

✅ Correct Answer: 1

___________ amplifier circulatory is employed to reduce the hum noise generated by the power supply in the ECG circuit.

1. low pass filters
2. high pass filters
3. band pass filters
4. notch filters

✅ Correct Answer: 4

The unit of sensitivity of an electrocardiograph is ________

1. m/mV
2. mm/V
3. mm/mV
4. m/V

✅ Correct Answer: 3

The volume of blood outside the dialyzer is known as priming volume.

1. True
2. False
3.
4.

✅ Correct Answer: 2

The range of CMRR of Foetal electrocardiogram is ______________ a) 0-120 dB b) 0-200 dB c) 0-150 dB d) 0- 130 dB

1. 0-120 dB
2. 0-200 dB
3. 0-150 dB
4. 0- 130 dB

✅ Correct Answer: 1

Power Line Hum is responsible for most of common-mode interfering signal.

1. True
2. False
3.
4.

✅ Correct Answer: 1

What is the role of Cupraphan in haemodialysis?

1. used to check conductivity of dialyzer
2. used as membrane
3. used to check blood leakage
4. not at all used

✅ Correct Answer: 2

Which of the following is the property of instrumentational amplifier?

1. Extremely low input impedance
2. High bias and offset currents
3. Low slew rate
4. Very high CMRR

✅ Correct Answer: 4

Foetal ECG signal detected via electrodes placed on mother’s abdomen is complex and requires attenuation of maternal signals for obtaining FHR.

1. True
2. False
3.
4.

✅ Correct Answer: 1

The blood is a good conductor of electricity.

1. True
2. False
3.
4.

✅ Correct Answer: 2

The range of FHR measurement due to substitution logic is between __________ bpm.

1. 20-220
2. 60-260
3. 40-240
4. 0-200

✅ Correct Answer: 3

The tympanic membrane separates the ear canal from the _____________

1. upper ear cavity
2. lower ear cavity
3. middle ear cavity
4. inner ear cavity

✅ Correct Answer: 3

The middle ear is exposed to atmospheric pressure only through the _______

1. eustachian tube
2. tympanic membrane
3. pinna
4. auditory nerve

✅ Correct Answer: 1

The major function of the middle ear is ____________

1. to transfer movements of the air in the outer ear to the cochlea
2. to transfer movements of the air in the outer ear to the auditory nerves
3. to transfer movements of the air in the outer ear to the tympanic membrane
4. to transfer movements of the air in the outer ear to the fluid-filled chambers of the inner ear

✅ Correct Answer: 4

The human ear responses to vibrations ranging from ___________

1. 20KHz – 20MHz
2. 2KHz – 20MHz
3. 20Hz – 20KHz
4. 2Hz – 2KHz

✅ Correct Answer: 3

Name the bone that rests upon the lower end of the cochlea and passes the vibrations directly into the fluid within.

1. malleus
2. stapes
3. incus
4. hammer

✅ Correct Answer: 2

Air conduction, by definition, is the transmission of sound through the external and middle ear to the internal ear.

1. True
2. False
3.
4.

✅ Correct Answer: 1

The hearing threshold is an invariable fixed intensity above which sound is always heard and below which sound is never heard.

1. True
2. False
3.
4.

✅ Correct Answer: 1

Unit of sound intensity ________

1. joules per sq. cm
2. watt per sq. cm
3. joules per cm
4. watt per cm

✅ Correct Answer: 2

Sound intensity is proportional to the _________ of sound pressure.

1. cube
2. square
3. inverse square
4. inverse square root

✅ Correct Answer: 2

Decibel expresses the logarithm of the ratio between two sound _________

1. intensities
2. powers
3. pressures
4. intensities, powers and pressures

✅ Correct Answer: 4

What is the unit of dB?

1. watts per sq cm
2. dyne per sq cm
3. unit less
4. watts per cm

✅ Correct Answer: 3

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 _________

1. N = 10 log I1/I2
2. N = 10 log I2/I1
3. N = -10 log I1/I2
4. N = log I1/I2

✅ Correct Answer: 1

__________ is specialized equipment, which is used for the identification of hearing the loss in individuals.

1. gaugemeter
2. tachometer
3. manometer
4. audiometer

✅ Correct Answer: 4

Which threshold of hearing is measured by a pure-tone audiometer?

1. air-conduction thresholds of hearing
2. bone-conduction thresholds of hearing
3. speech reception thresholds for diagnostic purposes
4. air-conduction and bone-conduction thresholds of hearing

✅ Correct Answer: 4

Speech audiometers are normally used to determine ______________

1. speech reception thresholds for diagnostic purposes
2. air-conduction and bone-conduction thresholds of hearing
3. bone-conduction thresholds of hearing
4. air-conduction thresholds of hearing

✅ Correct Answer: 1

How many kidneys does a human have?

1. one
2. two
3. three
4. four

✅ Correct Answer: 2

The removal of waste products from blood plasma is performed by ___________

1. kidney
2. liver
3. heart
4. lungs

✅ Correct Answer: 1

The regulation of the composition of blood plasma is done by which of the following organ?

1. skin
2. heart
3. kidney
4. lung

✅ Correct Answer: 3

Each kidney consists of about a million individual units, all similar in structure and function. These tiny units are called __________

1. nerves
2. neurons
3. capillaries
4. nephrons

✅ Correct Answer: 4

Which of the following is the correct anatomical position of the kidney?

1. front of the abdominal cavity just below the diaphragm
2. back of the abdominal cavity just below the diaphragm
3. back of the abdominal cavity just above the diaphragm
4. front of the abdominal cavity just above the diaphragm

✅ Correct Answer: 2

Each kidney consists _______ number of nephrons.

1. thousands
2. millions
3. billions
4. trillions

✅ Correct Answer: 2

The kidneys work only on plasma.

1. True
2. False
3.
4.

✅ Correct Answer: 1

The ___________ carry blood at very high pressure from the aorta into the glomerular capillary.

1. renal arteries
2. russal arteries
3. pulmonary arteries
4. fenal arteries

✅ Correct Answer: 1

The total amount of glomerular filtrate is about ____________ per day.

1. 180 liters
2. 18 liters
3. 18 ml
4. 180 ml

✅ Correct Answer: 1

The amount of urine formed by an average kidney in one day is ________

1. 10-10.5 L
2. 10-15 ml
3. 1-1.5 L
4. 5 L

✅ Correct Answer: 3

Which hormone of the pituitary gland helps to automatically reabsorb water from the kidney?

1. Anti-diuretic hormone
2. Diuretic hormone
3. Pro-diuretic hormone
4. Pseudo-diuretic hormone

✅ Correct Answer: 3