R4RIN – MCQs, Mock Tests | Biomedical Biomedical Instrumentation MCQs

The narrow beam transducer is very sensitive and produces a good trigger signal for instantaneous heart rate determination.

1. True
2. False
3.
4.

✅ Correct Answer: 1

Which of the following transducer is used to detect foetal heart movements over a wider area?

1. piezo-electric
2. ultrasonic
3. array
4. pressure

✅ Correct Answer: 1

Which transducer is arranged in the shape of a clover leaf so that it provides a large area of illumination?

1. piezo-electric
2. ultrasonic
3. array
4. pressure

✅ Correct Answer: 2

The array transducer housing is flexible to permit it to follow the contour of the abdomen regardless of shape changes with contractions.

1. True
2. False
3.
4.

✅ Correct Answer: 2

At what angle divergent beam is transmitted by a crystal in array transducer?

1. 10°
2. 20°
3. 30°
4. 40°

✅ Correct Answer: 4

The transmitting crystal emits 40° divergent beam so that the beam covers an area of approximately _____ cm diameter.

1. 10
2. 20
3. 30
4. 40

✅ Correct Answer: 1

What is the diameter of an array transducer?

1. 2
2. 4
3. 6
4. 8

✅ Correct Answer: 3

The array transducer can be held in place by a simple buckle.

1. True
2. False
3.
4.

✅ Correct Answer: 1

Which module consists of a pair of Perspex plates?

1. The dialyzer module
2. The recorder module
3. The sampling module
4. Heating bath module

✅ Correct Answer: 1

In the sampling unit, when it is in its earlier form consisted of a circular turntable carrying around its rim 40 disposable __________ of 2 ml capacity.

1. Polyvinyl cups
2. Polythene cups
3. Polyester cups
4. Polystyrene cups

✅ Correct Answer: 4

What is the ratio of the sampling time to wash time?

1. 1:2
2. 3:1
3. 2:1
4. 1:3

✅ Correct Answer: 3

Which of the following is not the part of the manifold?

1. Transmission tubing
2. Pump tubes
3. Platter
4. Plastic tubes

✅ Correct Answer: 4

Which of the following is not the type of tubing?

1. Acidflex tubing
2. Glass tubing
3. Polypropylene tubing
4. Tygon

✅ Correct Answer: 3

There are two types of coils employed in the system, which are ____

1. Tygon coils and mixing coils
2. Mixing coils and tubing coils
3. Delay coils and tygon coils
4. Mixing coils and delay coils

✅ Correct Answer: 4

In phasing, if the cholesterol stream arrives at Y time, albumin must arrive at ______

1. Y + 5 s
2. Y + 10 s
3. Y + 15 s
4. Y + 20 s

✅ Correct Answer: 3

Which coils are used to permit the channels to enter the calorimeter in the proper sequence?

1. Mixing coils
2. Delay coils
3. Solvaflex coils
4. Phasing coils

✅ Correct Answer: 4

_____ is non-invasive method allowing the monitoring of the saturation of a patient’s hemoglobin.

1. Ear Oximetry
2. Pulse Oximetry
3. Skin-Reflectance Oximetry
4. Intravascular Oximetry

✅ Correct Answer: 2

A = log I0/I,where I0 is_____

1. Incident light Intensity
2. Transmitted light Intensity
3. Extinction coefficient
4. Concentration

✅ Correct Answer: 1

A = ɛDC, where ɛ is _______

1. Incident light Intensity
2. Transmitted light Intensity
3. Extinction coefficient
4. Concentration

✅ Correct Answer: 3

A pulse oximeter shows the percentage of venous hemoglobin in the oxyhemoglobin (HbO2) and hemoglobin (Hb).

1. True
2. False
3.
4.

✅ Correct Answer: 2

What is used as a photodetector in pulse oximetry?

1. Phototransistor
2. Solar cell
3. Photodiode
4. Photographic plates

✅ Correct Answer: 3

What is the wavelength of the red LED in pulse oximetry?

1. 660 nm
2. 740 nm
3. 05 nm
4. 950 nm

✅ Correct Answer: 1

What is the wavelength of infrared LED in pulse oximetry?

1. 660 nm
2. 740 nm
3. 905 nm
4. 950 nm

✅ Correct Answer: 3

A pulse oximeter is useful in any setting where a patients oxygenation is unstable.

1. True
2. False
3.
4.

✅ Correct Answer: 1

Portable pulse oximeters are useful for ______ whose oxygen levels may decrease at high altitude.

1. Athlete
2. Swimmer
3. Mountain climber
4. Fisher

✅ Correct Answer: 3

______ is very useful for patients having respiratory or cardiac problems because of their simplicity of use and the ability to provide continuous and immediate oxygen saturation levels.

1. Pulse Oximeter
2. Ear Oximeter
3. Skin Reflactance Oximeter
4. Intravascular Oximeter

✅ Correct Answer: 1

What is intrauterine pressure during the expulsion period?

1. 130 mm Hg
2. 140 mm Hg
3. 150 mm Hg
4. 160 mm Hg

✅ Correct Answer: 3

What is the interval of uterine contractions in a normal patient in spontaneous active labour?

1. 1 to 3 minutes
2. 3 to 5 minutes
3. 5 to 7 minutes
4. 7 to 9 minutes

✅ Correct Answer: 3

What is the duration of uterine contractions in a normal patient in spontaneous active labour?

1. 0 to 30 s
2. 30 to 70 s
3. 80 to 100 s
4. 110 to 150 s

✅ Correct Answer: 2

The toco-transducers are temperature sensitive.

1. True
2. False
3.
4.

✅ Correct Answer: 2

What is the peak intensity of uterine contractions in a normal patient in spontaneous active labour?

1. 0 to 35 mm Hg
2. 50 to 75 mm Hg
3. 90 to 120 mm Hg
4. 120 to 150 mm Hg

✅ Correct Answer: 2

What are labour-activity transducers?

1. temperature transducer
2. ultrasonic transducer
3. pressure transducer
4. piezoelectric transducer

✅ Correct Answer: 3

What is used to convert the movement of transducer due to an increase of tension in uterus into an electric signal?

1. AC Amplifier
2. Strain guage
3. Synchronous detector
4. piezoelectric crystal

✅ Correct Answer: 2

The narrow beam transducer permits the operator to position the baseline on the zero-level line of recording chart.

1. True
2. False
3.
4.

✅ Correct Answer: 2

In external toco-tonometry, movement of _____ may be superimposed on labour activity.

1. heart
2. eye
3. foetus
4. muscle

✅ Correct Answer: 3

What is measured in the internal method using fluid-filled catheter?

1. IUP
2. ECG
3. IUC
4. EMG

✅ Correct Answer: 1

What is the range of Instantaneous beat to beat rate digitally displayed?

1. 0 to 50 bpm
2. 50 to 210 bpm
3. 210 to 350 bpm
4. 350 to 410 bpm

✅ Correct Answer: 2

A _______ channel chart recorder is incorporated in instruments used for monitoring labour activity.

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

✅ Correct Answer: 2

What is the standard chart speed?

1. 2 cm/min
2. 3 cm/min
3. 4 cm/min
4. 5 cm/min

✅ Correct Answer: 1

In two-channel chart recorder, FHR is recorded on a calibrated chart in ________

1. cm/min
2. m/min
3. beats/min
4. pulses/min

✅ Correct Answer: 3

Uterine contractions are calibrated in range of ______ in two-channel chart recorder.

1. 0-100 mm Hg
2. 100-200 mm Hg
3. 200-300 mm Hg
4. 300-400 mm Hg

✅ Correct Answer: 1

The instrument which carries out a continuous and simultaneous recording of the instantaneous foetal heart rate and labour activity is called _________

1. Ergometer
2. Cardiotocograph
3. Cardiotocometer
4. Cardiotonometer

✅ Correct Answer: 2

________ is not an indirect method of foetal heart rate in cordiotocography monitoring.

1. Foetal ECG with scalp electrode
2. Foetal phonocardiogram
3. Abdominal foetal electrocardiogram
4. Ultrasound techniques

✅ Correct Answer: 1

_______ is a direct technique of uterine contraction in cardiotocographic monitoring.

1. Tocodynamometry
2. Intrauterine pressure measurement
3. Phonocardiometry
4. Ultrasound technique

✅ Correct Answer: 2

The galvanometer, which needs a frequency response of only 3 MHz, is positioned by a servo motor through a silent step-down belt drive.

1. True
2. False
3.
4.

✅ Correct Answer: 2

The intrauterine pressure can reach values of 150 mmHg or more during the expulsion period.

1. True
2. False
3.
4.

✅ Correct Answer: 1

Which transducer cannot be used in the same place as the foetal heart rate detector, thus the patient must have two transducers on her abdomen?

1. Cardiotocometer
2. Toco-tonometer
3. LVDT
4. IUPC

✅ Correct Answer: 2

Which is the most important of all instrumental methods of analysis in clinical chemistry?

1. Colorimetry
2. Spectrophotometry
3. Pneumotachometry
4. Oximetry

✅ Correct Answer: 2

Which method of the following is based on the absorption of electromagnetic radiation in visible, ultraviolet and infrared ranges?

1. Colorimetry
2. Spectrophotometry
3. Pneumotachometry
4. Oximetry

✅ Correct Answer: 2

Where are the electrodes placed for recording foetal electrocardiogram?

1. heart
2. abdomen
3. brain
4. veins

✅ Correct Answer: 2

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Biomedical Instrumentation MCQs – Oximeters