Domain 2

Instrumentation and Technical Principles

Apply amplifier, filter, sampling and electrical-safety principles.

50questionsExam mode

Question 1 of 50

During biocalibration, both EOG channels deflect in the same direction when the patient looks left and right. What is the best first action?

A.Increase EEG sensitivityB.Apply the notch filterC.Check EOG derivations and electrode connectionsD.Replace respiratory effort belts

Question 2 of 50

A sleep laboratory competency review presents this case: During biocalibration, both EOG channels deflect in the same direction when the patient looks left and right. What is the best first action?

A.Replace respiratory effort beltsB.Check EOG derivations and electrode connectionsC.Increase EEG sensitivityD.Apply the notch filter

Question 3 of 50

A second technologist independently reviews the following scenario: During biocalibration, both EOG channels deflect in the same direction when the patient looks left and right. What is the best first action?

A.Replace respiratory effort beltsB.Increase EEG sensitivityC.Apply the notch filterD.Check EOG derivations and electrode connections

Question 4 of 50

During a quality-assurance conference, the team considers this question: During biocalibration, both EOG channels deflect in the same direction when the patient looks left and right. What is the best first action?

A.Replace respiratory effort beltsB.Apply the notch filterC.Check EOG derivations and electrode connectionsD.Increase EEG sensitivity

Question 5 of 50

A board-style practice form presents the following case: During biocalibration, both EOG channels deflect in the same direction when the patient looks left and right. What is the best first action?

A.Check EOG derivations and electrode connectionsB.Increase EEG sensitivityC.Apply the notch filterD.Replace respiratory effort belts

Question 6 of 50

What is the primary effect of an excessively low high-frequency filter setting on an EMG channel?

A.It increases sampling frequencyB.It amplifies direct current driftC.It attenuates faster muscle activityD.It reverses waveform polarity

Question 7 of 50

A sleep laboratory competency review presents this case: What is the primary effect of an excessively low high-frequency filter setting on an EMG channel?

A.It reverses waveform polarityB.It attenuates faster muscle activityC.It increases sampling frequencyD.It amplifies direct current drift

Question 8 of 50

A second technologist independently reviews the following scenario: What is the primary effect of an excessively low high-frequency filter setting on an EMG channel?

A.It reverses waveform polarityB.It amplifies direct current driftC.It increases sampling frequencyD.It attenuates faster muscle activity

Question 9 of 50

During a quality-assurance conference, the team considers this question: What is the primary effect of an excessively low high-frequency filter setting on an EMG channel?

A.It amplifies direct current driftB.It attenuates faster muscle activityC.It reverses waveform polarityD.It increases sampling frequency

Question 10 of 50

A board-style practice form presents the following case: What is the primary effect of an excessively low high-frequency filter setting on an EMG channel?

A.It reverses waveform polarityB.It increases sampling frequencyC.It attenuates faster muscle activityD.It amplifies direct current drift

Question 11 of 50

Which change best reduces the risk of aliasing when recording a rapidly changing signal?

A.Lower display sensitivityB.Use an adequate sampling rateC.Increase electrode impedanceD.Reverse the input polarity

Question 12 of 50

A sleep laboratory competency review presents this case: Which change best reduces the risk of aliasing when recording a rapidly changing signal?

A.Increase electrode impedanceB.Lower display sensitivityC.Use an adequate sampling rateD.Reverse the input polarity

Question 13 of 50

A second technologist independently reviews the following scenario: Which change best reduces the risk of aliasing when recording a rapidly changing signal?

A.Use an adequate sampling rateB.Lower display sensitivityC.Reverse the input polarityD.Increase electrode impedance

Question 14 of 50

During a quality-assurance conference, the team considers this question: Which change best reduces the risk of aliasing when recording a rapidly changing signal?

A.Lower display sensitivityB.Reverse the input polarityC.Increase electrode impedanceD.Use an adequate sampling rate

Question 15 of 50

A board-style practice form presents the following case: Which change best reduces the risk of aliasing when recording a rapidly changing signal?

A.Increase electrode impedanceB.Lower display sensitivityC.Reverse the input polarityD.Use an adequate sampling rate

Question 16 of 50

A differential amplifier displays the difference between which signals?

A.The highest and lowest filter settingsB.The patient and earth ground onlyC.The impedance of two electrodesD.The voltages at its two inputs

Question 17 of 50

A sleep laboratory competency review presents this case: A differential amplifier displays the difference between which signals?

A.The impedance of two electrodesB.The voltages at its two inputsC.The highest and lowest filter settingsD.The patient and earth ground only

Question 18 of 50

A second technologist independently reviews the following scenario: A differential amplifier displays the difference between which signals?

A.The highest and lowest filter settingsB.The voltages at its two inputsC.The patient and earth ground onlyD.The impedance of two electrodes

Question 19 of 50

During a quality-assurance conference, the team considers this question: A differential amplifier displays the difference between which signals?

A.The highest and lowest filter settingsB.The patient and earth ground onlyC.The impedance of two electrodesD.The voltages at its two inputs

Question 20 of 50

A board-style practice form presents the following case: A differential amplifier displays the difference between which signals?

A.The voltages at its two inputsB.The highest and lowest filter settingsC.The impedance of two electrodesD.The patient and earth ground only

Question 21 of 50

What is the likely effect of setting the low-frequency filter too high on an EEG channel?

A.Enhancement of slow wavesB.Improved electrode impedanceC.Attenuation of slow activityD.Creation of true spindles

Question 22 of 50

A sleep laboratory competency review presents this case: What is the likely effect of setting the low-frequency filter too high on an EEG channel?

A.Attenuation of slow activityB.Creation of true spindlesC.Enhancement of slow wavesD.Improved electrode impedance

Question 23 of 50

A second technologist independently reviews the following scenario: What is the likely effect of setting the low-frequency filter too high on an EEG channel?

A.Creation of true spindlesB.Attenuation of slow activityC.Enhancement of slow wavesD.Improved electrode impedance

Question 24 of 50

During a quality-assurance conference, the team considers this question: What is the likely effect of setting the low-frequency filter too high on an EEG channel?

A.Enhancement of slow wavesB.Creation of true spindlesC.Improved electrode impedanceD.Attenuation of slow activity

Question 25 of 50

A board-style practice form presents the following case: What is the likely effect of setting the low-frequency filter too high on an EEG channel?

A.Attenuation of slow activityB.Enhancement of slow wavesC.Improved electrode impedanceD.Creation of true spindles

Question 26 of 50

Why are similarly low electrode impedances desirable within a channel pair?

A.They guarantee no artifactB.They improve common-mode rejectionC.They eliminate the need for a groundD.They create higher physiologic voltage

Question 27 of 50

A sleep laboratory competency review presents this case: Why are similarly low electrode impedances desirable within a channel pair?

A.They eliminate the need for a groundB.They create higher physiologic voltageC.They improve common-mode rejectionD.They guarantee no artifact

Question 28 of 50

A second technologist independently reviews the following scenario: Why are similarly low electrode impedances desirable within a channel pair?

A.They improve common-mode rejectionB.They eliminate the need for a groundC.They guarantee no artifactD.They create higher physiologic voltage

Question 29 of 50

During a quality-assurance conference, the team considers this question: Why are similarly low electrode impedances desirable within a channel pair?

A.They improve common-mode rejectionB.They eliminate the need for a groundC.They guarantee no artifactD.They create higher physiologic voltage

Question 30 of 50

A board-style practice form presents the following case: Why are similarly low electrode impedances desirable within a channel pair?

A.They improve common-mode rejectionB.They guarantee no artifactC.They create higher physiologic voltageD.They eliminate the need for a ground

Question 31 of 50

Why should a notch filter be used cautiously?

A.It measures carbon dioxideB.It changes electrode locationC.It increases sampling rateD.It may distort physiologic activity near the filtered frequency

Question 32 of 50

A sleep laboratory competency review presents this case: Why should a notch filter be used cautiously?

A.It may distort physiologic activity near the filtered frequencyB.It measures carbon dioxideC.It changes electrode locationD.It increases sampling rate

Question 33 of 50

A second technologist independently reviews the following scenario: Why should a notch filter be used cautiously?

A.It changes electrode locationB.It measures carbon dioxideC.It may distort physiologic activity near the filtered frequencyD.It increases sampling rate

Question 34 of 50

During a quality-assurance conference, the team considers this question: Why should a notch filter be used cautiously?

A.It increases sampling rateB.It may distort physiologic activity near the filtered frequencyC.It measures carbon dioxideD.It changes electrode location

Question 35 of 50

A board-style practice form presents the following case: Why should a notch filter be used cautiously?

A.It may distort physiologic activity near the filtered frequencyB.It measures carbon dioxideC.It increases sampling rateD.It changes electrode location

Question 36 of 50

According to the sampling principle, the sampling rate should be at least how high relative to the highest frequency of interest?

A.More than twiceB.Exactly ten times in every situationC.One halfD.Equal

Question 37 of 50

A sleep laboratory competency review presents this case: According to the sampling principle, the sampling rate should be at least how high relative to the highest frequency of interest?

A.One halfB.More than twiceC.EqualD.Exactly ten times in every situation

Question 38 of 50

A second technologist independently reviews the following scenario: According to the sampling principle, the sampling rate should be at least how high relative to the highest frequency of interest?

A.More than twiceB.EqualC.Exactly ten times in every situationD.One half

Question 39 of 50

During a quality-assurance conference, the team considers this question: According to the sampling principle, the sampling rate should be at least how high relative to the highest frequency of interest?

A.One halfB.EqualC.Exactly ten times in every situationD.More than twice

Question 40 of 50

A board-style practice form presents the following case: According to the sampling principle, the sampling rate should be at least how high relative to the highest frequency of interest?

A.EqualB.Exactly ten times in every situationC.More than twiceD.One half

Question 41 of 50

If sensitivity is increased on a displayed EEG channel, what happens to a given voltage deflection on the screen?

A.It appears largerB.Its frequency doublesC.It disappearsD.Its polarity reverses

Question 42 of 50

A sleep laboratory competency review presents this case: If sensitivity is increased on a displayed EEG channel, what happens to a given voltage deflection on the screen?

A.It disappearsB.Its polarity reversesC.Its frequency doublesD.It appears larger

Question 43 of 50

A second technologist independently reviews the following scenario: If sensitivity is increased on a displayed EEG channel, what happens to a given voltage deflection on the screen?

A.Its polarity reversesB.It appears largerC.Its frequency doublesD.It disappears

Question 44 of 50

During a quality-assurance conference, the team considers this question: If sensitivity is increased on a displayed EEG channel, what happens to a given voltage deflection on the screen?

A.It disappearsB.It appears largerC.Its frequency doublesD.Its polarity reverses

Question 45 of 50

A board-style practice form presents the following case: If sensitivity is increased on a displayed EEG channel, what happens to a given voltage deflection on the screen?

A.Its polarity reversesB.It disappearsC.It appears largerD.Its frequency doubles

Question 46 of 50

A calibration signal displays at different amplitudes in two channels with identical settings. What is the best interpretation?

A.The patient entered REM sleepB.The respiratory belts are reversedC.The channels require technical investigationD.The oximeter is averaging normally

Question 47 of 50

A sleep laboratory competency review presents this case: A calibration signal displays at different amplitudes in two channels with identical settings. What is the best interpretation?

A.The respiratory belts are reversedB.The patient entered REM sleepC.The oximeter is averaging normallyD.The channels require technical investigation

Question 48 of 50

A second technologist independently reviews the following scenario: A calibration signal displays at different amplitudes in two channels with identical settings. What is the best interpretation?

A.The patient entered REM sleepB.The oximeter is averaging normallyC.The respiratory belts are reversedD.The channels require technical investigation

Question 49 of 50

During a quality-assurance conference, the team considers this question: A calibration signal displays at different amplitudes in two channels with identical settings. What is the best interpretation?

A.The patient entered REM sleepB.The channels require technical investigationC.The oximeter is averaging normallyD.The respiratory belts are reversed

Question 50 of 50

A board-style practice form presents the following case: A calibration signal displays at different amplitudes in two channels with identical settings. What is the best interpretation?

A.The respiratory belts are reversedB.The oximeter is averaging normallyC.The channels require technical investigationD.The patient entered REM sleep

Reference framework

These are independently written educational questions aligned to the public BRPT blueprint and professional technical references. Always use the current official scoring manual, laboratory policy and clinician orders in practice.