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ABRET Board Exam Questions and Answers 2025
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ABRET Board Exam Questions and Answers 2025
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ABRET Board Exam Questions and Answers 2025The basic unit for measuring current flow is
atomic weight
Coulomb
Volt
Ampere - ✓✓✓D. Ampere
The basic unit of resistance
Ohm
Coulomb
Ampere
Volt - ✓✓✓A. Ohm
Which of the following is not a valid expression of Ohm's law?
R=EI or (R=VI)
E=IR or (V=IR)
I= E/R or (I=V/R)
R= E/I or (R= V/I) - ✓✓✓A. R=EI or (R=VI)
Which of the following is not a unit for measuring alternating frequencies
Cycles per second
Volts
Hertz
Kilocycles - ✓✓✓B. Volts
Which of the following describes the action of a capacitor?
opposes changes in current flow
Converts alternating current to direct current
Creates a direct current resistance
Stores energy - ✓✓✓D. Stores energy
A circuit that allows some frequencies to pass through it, while others are blocked is a...
Resistor
Transistor
Filter
Reactor - ✓✓✓C. Filter
A combination of electronic components designed to increase the power, voltage, or
current of a signal
Amplifier
Line filter
Master gain control
Sensitivity - ✓✓✓A. Amplifier
1
,A small fluctuating output recorded by the EEG instrument even when there is no input
signal is called...
output voltage
Linear Distortion
60Hz interferance
Noise - ✓✓✓D. Noise
The EEG amplifier is designed so that when input 1 is more negative than input 2 the
deflection will be...
downward
upward
absent
sinusoidal - ✓✓✓B. Upward
Common mode rejection is...
The ability of an amplifier to cancel out ECG artifact
The characteristics of an amplifier that rejects external interference
is dependent on the sampling rate
Controlled by the 60- cycle notch filter - ✓✓✓B. The characteristics of an amplifier that
rejects external interference
Which of the following is most attenuated by a low frequency filter of 1 Hz
0.5 Hz
5.0 Hz
10.0 Hz
0.1 Hz - ✓✓✓D. 0.1 Hz
Time constant is defined as the time required...
for the deflection to fall (decay) to 47% of the peak deflection
for the deflection to fall (decay) 57% of the peak deflection
for the deflection to fall (decay) 67% of the peak deflection
for the deflection to fall (decay) to 67% of the peak deflection - ✓✓✓D. for the deflection
to fall (decay) to 67% of the peak deflection
An EEG record has 3/sec spike & wave discharges. Both the spike and the slow wave
have voltages of 100uV. If this discharge is recorded with a LFF of 5Hz and a sensitivity
of 10uV/mm, what would be the deflection of the spike and the wave?
spike 10mm & wave 6mm
spike 6mm & wave 10mm
spike 10mm & wave 10mm
spike 6mm & wave 6mm - ✓✓✓a. spike 10mm & wave 6mm
A high frequency setting of 35 Hz would attenuate 50 Hz muscle activity by
approximately what percentage
10%
2
, 20%
40%
100% - ✓✓✓C. 40%
The filters creating a very narrow band pass that should rarely be used clinically are
LF 5.0 Hz and HF 70 Hz
LF 5.0 Hz and HF 15 Hz
LF 0.1 Hz and HF 70 Hz
LF 0.1 Hz and HF 15 Hz - ✓✓✓B. LF 5.0 Hz and HF 15 Hz
During the recording of cerebral activity, the calibration input voltage is changed from 50
uV to 100 uV. What will be the result?
No effect on the activity being recorded
A two fold increase in amplitude
A one half reduction of amplitude
Clipping of the waveform - ✓✓✓A. No effect on the activity being recorded
What input voltage is necessary to give a calibration deflection between 5 and 10mm if
the sensitivity is 30uV/mm?
10uV
50uV
100uV
200uV - ✓✓✓D. 200 uV
The term RAM means
read only memory used for archiving data
The amount of data that can be stored on a rewritable CD
The amount of data that can be stored on a DVD
Temporary memory storage that is critical to rapid computer operations - ✓✓✓D.
Temporary memory storage that is critical to rapid computer operations
Three basic computer ports are
Intranet, Internet, and Extranet
Internal, External, and Bifid
Serial, Paradoxical, and US
Serial, Parallel, and USB - ✓✓✓D. Serial, Parallel, and USB
Which of the following is not related to measuring electrode resistance
Opposition to direct current flow
Measurement while the electrode is unattached to the scalp
Measurement with an ohmmeter
Opposition to alternating current flow - ✓✓✓D. Opposition to alternating current flow
In a referential montage, how is the origin of the potential determined?
Morphology
3
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