WorksheetsECC1341- Medical Electronics FA 1 SKILL Quiz
Total questions: 20
Worksheet time: 7mins
What is the primary role of a transducer in biomedical measurement?
Analyse physiological data.
Convert one form of energy to another.
Store biomedical data.
Display physiological waveforms.
Which of the following is a key advance of a smart sensor?
Larger package size.
Increased external processing needs.
Built-in functionalities like amplification and A/D conversion.
Inability to calibrate.
What does high input impedance in a biomedical amplifier prevent?
Signal amplification.
Current overload.
Signal distortion.
Loading of the signal source.
Which of the following best defines "accuracy" in static characteristics?
Repeatability of measurements.
Minimum detectable input change.
Closeness to true value including all errors.
Output change over time.
Which characteristics describes how a system responds to rapid input changes?
Linearity.
Sensitivity.
Dynamic characteristics.
Threshold.
What is the function of a low-pass filter in signal processing?
Allow low and high frequencies to pass.
Attenuate all frequencies.
Allow low frequencies and block high frequencies.
Only pass frequencies at 60 Hz.
Biopotential electrodes are primarily used to detect signals from:
Mechanical movement.
Electrical signals from physiological activity.
Optical imaging.
Chemical reactions.
What type of noise has a power density that is uniform across all frequencies?
Thermal noise (Johnson-Nyquist noise)
1/f noise
Interference
Artifact
Which type of noise arises from within the body and can interfere with signals like EEG?
Motion artifacts.
Environment noise.
Physiological noise.
Instrumental noise.
What does hysteresis in a measurement system refer to?
Noise during data acquisition.
System lag to sudden inputs.
Output depending on whether input is increasing or decreasing.
Minimum input to produce an output.
Disposable foam pad electrodes are most commonly used in:
EEG recording
EMG measurements
ECG monitoring
Deep brain stimulation
Which type of electrode is specifically designed to minimize motion artifacts?
Floating electrode
Suction electrode
Fabric electrode
Limb electrode
Flexible thin-film neonatal electrodes are made using which base material?
Stainless steel
Gold-coated glass
Mylar film with Ag/AgCl deposition
Copper sheet
What is the primary application of cortical surface electrodes?
ECG mapping
Muscle activity studies
Recording subdural EEGs
Deep brain stimulation
Einthoven's law states that:
Lead I = Lead II + Lead III
Lead II = Lead I - Lead II
Lead II = Lead I + Lead III
Lead III = Lead II - Lead I
In catheter-based pressure measurement systems, how is blood pressure detected and monitored in real-time?
By detecting changes in temperature using thermistors
By measuring oxygen saturation with a pulse oximeter
By converting mechanical deformation of a diaphragm into electrical or optical signals using embedded sensors
By analysing blood colour changes under LED light
Why is platinum commonly used in resistance temperature detectors (RTDs)?
It is magnetic and easy to shape
It has a stable and predictable change in resistance with temperature
It has a negative temperature coefficient
It is cheaper than other metals
In a thermocouple, the voltage generated is mainly due to:
The temperature of the surrounding air
The battery inside the sensor
The difference in work function between two different metals at a junction
The thickness of the metal wires used
Which Korotkoff sound is used to determine the diastolic blood pressure during manual blood pressure measurement?
First Korotkoff sound - Snapping sound
Second Korotkoff sound - Murmurs
Fourth Korotkoff sound - Muting or thumping
Fifth Korotkoff sound - Disappearance of sound
What is the typical frequency range of Korotkoff sounds heard during systolic pressure measurement?
1-10 Hz
10-18 Hz
18-26 Hz
40-60 Hz
