2024 ABRET Board Exam

2024 ABRET Board Exam Actual Questions and Answers, Complete 100%

• The basic unit for measuring current flow is
• atomic weight
• Coulomb
• Volt
• Ampere

Answer: D. Ampere

• The basic unit of resistance
• Ohm
• Coulomb
• Ampere
• Volt

Answer: 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)

Answer: A. R=EI or (R=VI)

• Which of the following is not a unit for measuring alternating frequencies
• Cycles per second
• Volts
• Hertz
• Kilocycles

Answer: 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

Answer: D. Stores energy

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• A circuit that allows some frequencies to pass through it, while others are blocked

is a...

• Resistor
• Transistor
• Filter
• Reactor

Answer: 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

Answer: A. Amplifier

• 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

Answer: 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

Answer: 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

Answer: B. The characteristics of an amplifier that rejects external interference

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• 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

Answer: 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

Answer: 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

Answer: 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%

Answer: 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

Answer: B. LF 5.0 Hz and HF 15 Hz

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