CNIM
CNIM INSTRUMENTATION EXAM QUESTIONS AND ANSWERS
A unit of resistance is symbolized by
A- A
B- ohms
C- E
D- micro - correct answer B- ohms
The capacity to resolve amplitudes of 256 discrete steps would require an 8 bit A
to D converter. This can be represented by:
A- 8
B- 8/256
C- 256
D- 2^8 - correct answer D- 2^8
What is the minimum required bandpass for an EP system?
A- 1 - 1000 Hz
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B- 0.1 - 5000 Hz
C- 30 - 1500 Hz
D- 1 Hz - 20 KHz - correct answer B- 0.1 - 5000 Hz
The gain of an amplifier, set to give an output signal of 1 volt for an input signal of
10 microV, is
A- 100,000
B- 10,000
C- 100
D- 1,000 - correct answer A- 100,000
A 100 mS epoch is recorded with a 10 mS post - stimulus triggering. Which of the
following best describes the resulting sweep?
A- A 100 mS sweep starting 10 mS after the stimulus
B- A 90 mS sweep starting 10 mS after the stimulus
C- A 100 mS sweep starting 10 mS prior to the stimulus
D- A 110 mS sweep starting 10 mS prior to the stimulus - correct answer A- A 100
mS sweep starting 10 mS after the stimulus
SSEP recordings typically require a bandpass of
A- 1000 Hz to 5,000 Hz
B- 30 Hz to 3,000 Hz
C- 100 Hz to 1,000 Hz
D- .5 Hz to 200 Hz - correct answer B- 30 Hz to 3,000 Hz
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To accurately represent the amplitude of an EP waveform, a match must be made
between the
A- dwell time and sampling rate
B- signal size and the vertical capacity of the digitizer
C- high-frequency noise and smoothing operation of the instrument
D- horizontal resolution and signal size - correct answer B- signal size and the
vertical capacity of the digitizer
In selecting the horizontal parameters of analysis, the
A- sampling rate should be the equivalent of the highest frequency in the signal
B- analysis period should be at least twice the Nyquist frequency
C- sampling rate should be at least two times greater than the highest frequency
in the signal
D- analysis period should approach the Nyquist frequency - correct answer C-
sampling rate should be at least two times greater than the highest frequency in
the signal
The assumption that responses of excessive amplitude are likely to contain artifact
forms the basis for
A- digital filtering
B- artifact rejection
C- dwell time
D- digital averaging - correct answer B- artifact rejection
In a differential amplifier used for intraoperative monitoring, the common mode
rejection of in phase signals is typically
CNIM INSTRUMENTATION EXAM QUESTIONS AND ANSWERS
A unit of resistance is symbolized by
A- A
B- ohms
C- E
D- micro - correct answer B- ohms
The capacity to resolve amplitudes of 256 discrete steps would require an 8 bit A
to D converter. This can be represented by:
A- 8
B- 8/256
C- 256
D- 2^8 - correct answer D- 2^8
What is the minimum required bandpass for an EP system?
A- 1 - 1000 Hz
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B- 0.1 - 5000 Hz
C- 30 - 1500 Hz
D- 1 Hz - 20 KHz - correct answer B- 0.1 - 5000 Hz
The gain of an amplifier, set to give an output signal of 1 volt for an input signal of
10 microV, is
A- 100,000
B- 10,000
C- 100
D- 1,000 - correct answer A- 100,000
A 100 mS epoch is recorded with a 10 mS post - stimulus triggering. Which of the
following best describes the resulting sweep?
A- A 100 mS sweep starting 10 mS after the stimulus
B- A 90 mS sweep starting 10 mS after the stimulus
C- A 100 mS sweep starting 10 mS prior to the stimulus
D- A 110 mS sweep starting 10 mS prior to the stimulus - correct answer A- A 100
mS sweep starting 10 mS after the stimulus
SSEP recordings typically require a bandpass of
A- 1000 Hz to 5,000 Hz
B- 30 Hz to 3,000 Hz
C- 100 Hz to 1,000 Hz
D- .5 Hz to 200 Hz - correct answer B- 30 Hz to 3,000 Hz
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To accurately represent the amplitude of an EP waveform, a match must be made
between the
A- dwell time and sampling rate
B- signal size and the vertical capacity of the digitizer
C- high-frequency noise and smoothing operation of the instrument
D- horizontal resolution and signal size - correct answer B- signal size and the
vertical capacity of the digitizer
In selecting the horizontal parameters of analysis, the
A- sampling rate should be the equivalent of the highest frequency in the signal
B- analysis period should be at least twice the Nyquist frequency
C- sampling rate should be at least two times greater than the highest frequency
in the signal
D- analysis period should approach the Nyquist frequency - correct answer C-
sampling rate should be at least two times greater than the highest frequency in
the signal
The assumption that responses of excessive amplitude are likely to contain artifact
forms the basis for
A- digital filtering
B- artifact rejection
C- dwell time
D- digital averaging - correct answer B- artifact rejection
In a differential amplifier used for intraoperative monitoring, the common mode
rejection of in phase signals is typically
