Certified EKG Technician (CET)
Examination 2026–2027 | Comprehensive
Question Practice Test with Answers &
Rationales| Free Pdf Access
1. What is the primary role of a Certified EKG Technician (CET)?
A. Perform electrocardiograms and monitor cardiac rhythms
B. Prescribe cardiac medications
C. Perform heart surgery
D. Diagnose all heart conditions independently
Correct Answer: A
Rationale: CETs are responsible for obtaining accurate electrocardiographic recordings
and monitoring cardiac rhythms under medical supervision.
2. What does an electrocardiogram (EKG/ECG) measure?
A. Electrical activity of the heart
B. Blood pressure
C. Oxygen saturation
D. Lung capacity
Correct Answer: A
Rationale: An EKG records the electrical impulses generated by the heart.
3. Which chamber of the heart receives oxygenated blood from the lungs?
A. Left atrium
B. Right atrium
,C. Right ventricle
D. Left ventricle
Correct Answer: A
Rationale: Oxygenated blood returns from the lungs to the left atrium through the
pulmonary veins.
4. Which chamber pumps oxygenated blood to the body?
A. Left ventricle
B. Right ventricle
C. Right atrium
D. Left atrium
Correct Answer: A
Rationale: The left ventricle generates the pressure needed to circulate blood throughout
the body.
5. How many standard leads are included in a 12-lead EKG?
A. 12
B. 6
C. 8
D. 10
Correct Answer: A
Rationale: A standard diagnostic EKG consists of 12 leads that provide multiple views of
cardiac electrical activity.
6. How many electrodes are typically used to obtain a 12-lead EKG?
A. 10
B. 12
C. 8
D. 6
Correct Answer: A
Rationale: Ten electrodes are placed on the body to generate the 12 leads.
, 7. Which wave represents atrial depolarization?
A. P wave
B. QRS complex
C. T wave
D. U wave
Correct Answer: A
Rationale: The P wave reflects electrical activation of the atria.
8. Which EKG component represents ventricular depolarization?
A. QRS complex
B. P wave
C. T wave
D. PR interval
Correct Answer: A
Rationale: The QRS complex corresponds to ventricular electrical activation.
9. Which wave represents ventricular repolarization?
A. T wave
B. P wave
C. Q wave
D. R wave
Correct Answer: A
Rationale: The T wave reflects recovery and repolarization of the ventricles.
10. What is the normal resting heart rate for adults?
A. 60–100 beats per minute
B. 20–40 beats per minute
C. 110–150 beats per minute
D. 150–200 beats per minute
Correct Answer: A
Examination 2026–2027 | Comprehensive
Question Practice Test with Answers &
Rationales| Free Pdf Access
1. What is the primary role of a Certified EKG Technician (CET)?
A. Perform electrocardiograms and monitor cardiac rhythms
B. Prescribe cardiac medications
C. Perform heart surgery
D. Diagnose all heart conditions independently
Correct Answer: A
Rationale: CETs are responsible for obtaining accurate electrocardiographic recordings
and monitoring cardiac rhythms under medical supervision.
2. What does an electrocardiogram (EKG/ECG) measure?
A. Electrical activity of the heart
B. Blood pressure
C. Oxygen saturation
D. Lung capacity
Correct Answer: A
Rationale: An EKG records the electrical impulses generated by the heart.
3. Which chamber of the heart receives oxygenated blood from the lungs?
A. Left atrium
B. Right atrium
,C. Right ventricle
D. Left ventricle
Correct Answer: A
Rationale: Oxygenated blood returns from the lungs to the left atrium through the
pulmonary veins.
4. Which chamber pumps oxygenated blood to the body?
A. Left ventricle
B. Right ventricle
C. Right atrium
D. Left atrium
Correct Answer: A
Rationale: The left ventricle generates the pressure needed to circulate blood throughout
the body.
5. How many standard leads are included in a 12-lead EKG?
A. 12
B. 6
C. 8
D. 10
Correct Answer: A
Rationale: A standard diagnostic EKG consists of 12 leads that provide multiple views of
cardiac electrical activity.
6. How many electrodes are typically used to obtain a 12-lead EKG?
A. 10
B. 12
C. 8
D. 6
Correct Answer: A
Rationale: Ten electrodes are placed on the body to generate the 12 leads.
, 7. Which wave represents atrial depolarization?
A. P wave
B. QRS complex
C. T wave
D. U wave
Correct Answer: A
Rationale: The P wave reflects electrical activation of the atria.
8. Which EKG component represents ventricular depolarization?
A. QRS complex
B. P wave
C. T wave
D. PR interval
Correct Answer: A
Rationale: The QRS complex corresponds to ventricular electrical activation.
9. Which wave represents ventricular repolarization?
A. T wave
B. P wave
C. Q wave
D. R wave
Correct Answer: A
Rationale: The T wave reflects recovery and repolarization of the ventricles.
10. What is the normal resting heart rate for adults?
A. 60–100 beats per minute
B. 20–40 beats per minute
C. 110–150 beats per minute
D. 150–200 beats per minute
Correct Answer: A
