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ABRET Actual EXAM Newest 2025-2026 Complete
All Questions And Correct Detailed Answers (Verified
Answers) |Already Graded A+||Brand New Version!
In a differential amplifier, if input 1 received a volt of +50mv and input
2 of -100mv, the output volt would be
a) 150 upward
b) 50 upward
c) 150 downward
d) 50 downward - ANSWER-d
What happens when a 60 cycle sine wave is sampled at 100Hz?
a) subharmonic response
b) aliasing
c) digital filtering
d) overlap data - ANSWER-b
Converts an analog signal into a series of digital binary numbers
a) fast fourier transform
b) impedance meter
c) differential amplifier
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d) A/D converter - ANSWER-d
CMRR of at least
a) 70Hz
b) 90Hz
c) 90dB
d) 70dB - ANSWER-c
Gradual changes in amp, freq, or spatial distribution of rhythms
a) background activity
b) asymmetry
c) attenuation
d) evolution - ANSWER-d
Time constant that best displays delta activity
a) 0.3 sec
b) 0.1 sec
c) 1 sec
d) 0.5 sec - ANSWER-c
60Hz notch filter would have the greatest effect on a waveform w/ a
duration of
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a) 10msec
b) 16msec
c) 50msec
d) 25msec - ANSWER-b
All favor cancellation of signals, except
a) equal impedances in the inputs
b) unequal impedances in the inputs
c) shorter inter-electrode distance
d) cerebral potentials in common mode - ANSWER-b
Most appropriate sampling rate that should be used for a 70Hz HFF,
according to Nyquist theory
a) 210 p/sec
b) 10 p/sec
c) 140 p/sec
d) 20 p/sec - ANSWER-c
Time constant of 0.5sec
a) 15Hz low pass filter
b) 0.3Hz high pass filter
c) 5Hz low filter
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d) 35Hz high filter - ANSWER-b
0.3Hz wave would be attenuated by what percent w/ 0.3Hz filter?
a) 0.5
b) 0.3
c) 0.7
d) unaffected - ANSWER-b
Time constant
a) time axis
b) low frequency filter
c) gain
d) sensitivity - ANSWER-b
Low sampling rate may cause fast freq to appear slower
a) long time constant
b) overfiltering
c) low impact impedance
d) aliasing - ANSWER-d
5Hz LFF will attenuate a 5Hz wave by
a) 5mm
ABRET Actual EXAM Newest 2025-2026 Complete
All Questions And Correct Detailed Answers (Verified
Answers) |Already Graded A+||Brand New Version!
In a differential amplifier, if input 1 received a volt of +50mv and input
2 of -100mv, the output volt would be
a) 150 upward
b) 50 upward
c) 150 downward
d) 50 downward - ANSWER-d
What happens when a 60 cycle sine wave is sampled at 100Hz?
a) subharmonic response
b) aliasing
c) digital filtering
d) overlap data - ANSWER-b
Converts an analog signal into a series of digital binary numbers
a) fast fourier transform
b) impedance meter
c) differential amplifier
,2|Page
d) A/D converter - ANSWER-d
CMRR of at least
a) 70Hz
b) 90Hz
c) 90dB
d) 70dB - ANSWER-c
Gradual changes in amp, freq, or spatial distribution of rhythms
a) background activity
b) asymmetry
c) attenuation
d) evolution - ANSWER-d
Time constant that best displays delta activity
a) 0.3 sec
b) 0.1 sec
c) 1 sec
d) 0.5 sec - ANSWER-c
60Hz notch filter would have the greatest effect on a waveform w/ a
duration of
,3|Page
a) 10msec
b) 16msec
c) 50msec
d) 25msec - ANSWER-b
All favor cancellation of signals, except
a) equal impedances in the inputs
b) unequal impedances in the inputs
c) shorter inter-electrode distance
d) cerebral potentials in common mode - ANSWER-b
Most appropriate sampling rate that should be used for a 70Hz HFF,
according to Nyquist theory
a) 210 p/sec
b) 10 p/sec
c) 140 p/sec
d) 20 p/sec - ANSWER-c
Time constant of 0.5sec
a) 15Hz low pass filter
b) 0.3Hz high pass filter
c) 5Hz low filter
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d) 35Hz high filter - ANSWER-b
0.3Hz wave would be attenuated by what percent w/ 0.3Hz filter?
a) 0.5
b) 0.3
c) 0.7
d) unaffected - ANSWER-b
Time constant
a) time axis
b) low frequency filter
c) gain
d) sensitivity - ANSWER-b
Low sampling rate may cause fast freq to appear slower
a) long time constant
b) overfiltering
c) low impact impedance
d) aliasing - ANSWER-d
5Hz LFF will attenuate a 5Hz wave by
a) 5mm
