ABRET Digital Instrumentation Exam Questions 100%
Verified Questions & Answers
Q: The amount by which the differential amplifier increases the magnitude of the input signal is its
a. resistance
b. filter
c. sensitivity
d. input impedance
Answer:
sensitivity
Q: Which of the following instruments magnifies the common-mode voltage difference between two inputs?
a. impedance meter
b. A/D converter
c. fast fourier transform
d. differential amplifier
Answer:
differential amplifier
Q: The sharpness of the frequency response curve is determined by the filter
a. bandwith
b. rolloff
c. notch
d. capacitance
Answer:
rolloff
Q: If the low frequency filter is changed from 1 Hz to 5 Hz, how will a 2 Hz slow wave be affected
a. it will be significantly attenuated
b. it will not be affected
c. it will be minimally attenuated
d. it will be accentuated
Answer:
it will be significantly attenuated
Q: Digital EEG montages are reformatted by using
a. the Nyquist theorem
b. fourier analysis
c. referentially recorded data
d. system reference
Answer:
system reference
, Q: The waveforms contain frequencies as high as 100 Hz. What is the Nyquist sampling rate?
a. >200 samples/second
b. 50 samples/second
c. 25 samples/second
d. >100 samples/second
Answer:
>200 samples/second
Q: What is the specification of the minimum sampling rate used, in relation to the highest frequency signal recorded?
a. Ohm's theory
b. Coulombs law
c. Paley-Winer theorem
d. Nyquist theory
Answer:
Nyquist theory
Q: Which of the following time constants would best display delta activity?
a. 0.5 sec
b. 0.3 sec
c. 1.0 sec
d. 0.1 sec
Answer:
1.0 sec
Q: Signals common to both inputs of a differential amplifier
a. cancelled
b. amplified
c. attenuated 37 %
d. attenuated 63 %
Answer:
cancelled
Q: Doubling the interelectrode distances will have what effect on the waveforms?
a. increase amplitude
b. increase slow activity
c. decrease muscle artifact
d. no effect
Answer:
increase amplitude
Q: Frequency
a. influenced by CMRR and measured in microvolts
b. influenced by sensitivity and measured in cycles per second
c. influenced by sampling rate and measured in hertz
d. influenced by impedance and measured in millimeters influence by sampling rate and
measured in hertz
Answer:
Verified Questions & Answers
Q: The amount by which the differential amplifier increases the magnitude of the input signal is its
a. resistance
b. filter
c. sensitivity
d. input impedance
Answer:
sensitivity
Q: Which of the following instruments magnifies the common-mode voltage difference between two inputs?
a. impedance meter
b. A/D converter
c. fast fourier transform
d. differential amplifier
Answer:
differential amplifier
Q: The sharpness of the frequency response curve is determined by the filter
a. bandwith
b. rolloff
c. notch
d. capacitance
Answer:
rolloff
Q: If the low frequency filter is changed from 1 Hz to 5 Hz, how will a 2 Hz slow wave be affected
a. it will be significantly attenuated
b. it will not be affected
c. it will be minimally attenuated
d. it will be accentuated
Answer:
it will be significantly attenuated
Q: Digital EEG montages are reformatted by using
a. the Nyquist theorem
b. fourier analysis
c. referentially recorded data
d. system reference
Answer:
system reference
, Q: The waveforms contain frequencies as high as 100 Hz. What is the Nyquist sampling rate?
a. >200 samples/second
b. 50 samples/second
c. 25 samples/second
d. >100 samples/second
Answer:
>200 samples/second
Q: What is the specification of the minimum sampling rate used, in relation to the highest frequency signal recorded?
a. Ohm's theory
b. Coulombs law
c. Paley-Winer theorem
d. Nyquist theory
Answer:
Nyquist theory
Q: Which of the following time constants would best display delta activity?
a. 0.5 sec
b. 0.3 sec
c. 1.0 sec
d. 0.1 sec
Answer:
1.0 sec
Q: Signals common to both inputs of a differential amplifier
a. cancelled
b. amplified
c. attenuated 37 %
d. attenuated 63 %
Answer:
cancelled
Q: Doubling the interelectrode distances will have what effect on the waveforms?
a. increase amplitude
b. increase slow activity
c. decrease muscle artifact
d. no effect
Answer:
increase amplitude
Q: Frequency
a. influenced by CMRR and measured in microvolts
b. influenced by sensitivity and measured in cycles per second
c. influenced by sampling rate and measured in hertz
d. influenced by impedance and measured in millimeters influence by sampling rate and
measured in hertz
Answer:
