ABRET BOARD EXAM (LATEST UPDATE 2025 – 2026)
QUESTIONS WITH VERIFIED ANSWERS GRADED A
The basic unit for measuring current flow is
A. atomic weight
B. Coulomb
C. Volt
D. Ampere - D. Ampere
The basic unit of resistance
A. Ohm
B. Coulomb
C. Ampere
D. Volt - A. Ohm
Which of the following is not a valid expression of Ohm's law?
A. R=EI or (R=VI)
B. E=IR or (V=IR)
C. I= E/R or (I=V/R)
D. 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
A. Cycles per second
B. Volts
C. Hertz
D. Kilocycles - B. Volts
Which of the following describes the action of a capacitor?
A. opposes changes in current flow
B. Converts alternating current to direct current
C. Creates a direct current resistance
D. Stores energy - D. Stores energy
A circuit that allows some frequencies to pass through it, while others
are blocked is a...
A. Resistor
,B. Transistor
C. Filter
D. Reactor - C. Filter
A combination of electronic components designed to increase the
power, voltage, or current of a signal
A. Amplifier
B. Line filter
C. Master gain control
D. Sensitivity - A. Amplifier
A small fluctuating output recorded by the EEG instrument even when
there is no input signal is called...
A. output voltage
B. Linear Distortion
C. 60Hz interferance
D. Noise - D. Noise
The EEG amplifier is designed so that when input 1 is more negative
than input 2 the deflection will be...
A. downward
B. upward
C. absent
D. sinusoidal - B. Upward
Common mode rejection is...
A. The ability of an amplifier to cancel out ECG artifact
B. The characteristics of an amplifier that rejects external
interference
C. is dependent on the sampling rate
D. 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
A. 0.5 Hz
B. 5.0 Hz
C. 10.0 Hz
, D. 0.1 Hz - D. 0.1 Hz
Time constant is defined as the time required...
A. for the deflection to fall (decay) to 47% of the peak deflection
B. for the deflection to fall (decay) 57% of the peak deflection
C. for the deflection to fall (decay) 67% of the peak deflection
D. 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?
a. spike 10mm & wave 6mm
b. spike 6mm & wave 10mm
c. spike 10mm & wave 10mm
d. 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
A. 10%
B. 20%
C. 40%
D. 100% - C. 40%
The filters creating a very narrow band pass that should rarely be used
clinically are
A. LF 5.0 Hz and HF 70 Hz
B. LF 5.0 Hz and HF 15 Hz
C. LF 0.1 Hz and HF 70 Hz
D. 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?
A. No effect on the activity being recorded
B. A two fold increase in amplitude
C. A one half reduction of amplitude
QUESTIONS WITH VERIFIED ANSWERS GRADED A
The basic unit for measuring current flow is
A. atomic weight
B. Coulomb
C. Volt
D. Ampere - D. Ampere
The basic unit of resistance
A. Ohm
B. Coulomb
C. Ampere
D. Volt - A. Ohm
Which of the following is not a valid expression of Ohm's law?
A. R=EI or (R=VI)
B. E=IR or (V=IR)
C. I= E/R or (I=V/R)
D. 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
A. Cycles per second
B. Volts
C. Hertz
D. Kilocycles - B. Volts
Which of the following describes the action of a capacitor?
A. opposes changes in current flow
B. Converts alternating current to direct current
C. Creates a direct current resistance
D. Stores energy - D. Stores energy
A circuit that allows some frequencies to pass through it, while others
are blocked is a...
A. Resistor
,B. Transistor
C. Filter
D. Reactor - C. Filter
A combination of electronic components designed to increase the
power, voltage, or current of a signal
A. Amplifier
B. Line filter
C. Master gain control
D. Sensitivity - A. Amplifier
A small fluctuating output recorded by the EEG instrument even when
there is no input signal is called...
A. output voltage
B. Linear Distortion
C. 60Hz interferance
D. Noise - D. Noise
The EEG amplifier is designed so that when input 1 is more negative
than input 2 the deflection will be...
A. downward
B. upward
C. absent
D. sinusoidal - B. Upward
Common mode rejection is...
A. The ability of an amplifier to cancel out ECG artifact
B. The characteristics of an amplifier that rejects external
interference
C. is dependent on the sampling rate
D. 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
A. 0.5 Hz
B. 5.0 Hz
C. 10.0 Hz
, D. 0.1 Hz - D. 0.1 Hz
Time constant is defined as the time required...
A. for the deflection to fall (decay) to 47% of the peak deflection
B. for the deflection to fall (decay) 57% of the peak deflection
C. for the deflection to fall (decay) 67% of the peak deflection
D. 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?
a. spike 10mm & wave 6mm
b. spike 6mm & wave 10mm
c. spike 10mm & wave 10mm
d. 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
A. 10%
B. 20%
C. 40%
D. 100% - C. 40%
The filters creating a very narrow band pass that should rarely be used
clinically are
A. LF 5.0 Hz and HF 70 Hz
B. LF 5.0 Hz and HF 15 Hz
C. LF 0.1 Hz and HF 70 Hz
D. 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?
A. No effect on the activity being recorded
B. A two fold increase in amplitude
C. A one half reduction of amplitude
