Page 1 of 72
NWCA CET CERTIFIED EKG TECHNICIAN) EXAM 2026
QUESTIONS LATEST 2026 – 2027 VERSION SOLVED
QUESTIONS & ANSWERS
NWCA CET Exam – Practice Questions
The NWCA CET (Certified EKG Technician) exam covers cardiovascular anatomy, ECG
interpretation, lead placement, arrhythmia recognition, patient preparation, and safety
protocols.
Anatomy & Physiology
1. Which valves open to allow the ventricles to fill with blood during diastole?
A. Aortic and pulmonic valves
B. Tricuspid and mitral valves
C. Mitral and aortic valves
D. Tricuspid and pulmonic valves
Answer: B
Rationale: The tricuspid and mitral (atrioventricular) valves open during ventricular
diastole to allow blood to flow from the atria into the ventricles.
2. The layer of the heart that is damaged during a myocardial infarction (heart
attack) is the:
A. Epicardium
B. Myocardium
C. Endocardium
D. Pericardium
Answer: B
Rationale: The myocardium is the middle muscular layer responsible for contraction. It
is damaged during a heart attack due to oxygen deprivation from blocked coronary
arteries.
, Page 2 of 72
3. The interior lining of the heart is called the:
A. Epicardium
B. Myocardium
C. Endocardium
D. Pericardium
Answer: C
Rationale: The endocardium is the innermost layer lining the chambers and valves. The
epicardium is the outermost layer, and the pericardium is the sac surrounding the heart.
4. The pulmonary veins deliver oxygenated blood to which chamber of the heart?
A. Left atrium
B. Left ventricle
C. Right atrium
D. Right ventricle
Answer: A
Rationale: The pulmonary veins are the only veins that carry oxygenated blood,
transporting it from the lungs to the left atrium.
5. The inferior vena cava returns deoxygenated blood to the heart from:
A. Upper extremities and head
B. The heart muscle itself
C. The lungs
D. The lower part of the body
Answer: D
Rationale: The inferior vena cava carries deoxygenated blood from the lower half of the
body (legs, abdomen, pelvis) back to the right atrium.
6. What is the normal resting heart rate for a healthy adult?
A. 40-50 bpm
B. 60-100 bpm
C. 100-140 bpm
D. 140-180 bpm
Answer: B
, Page 3 of 72
Rationale: Normal resting heart rate is 60-100 beats per minute. Below 60 is
bradycardia; above 100 is tachycardia.
7. The double-walled sac that encloses the heart is called the:
A. Epicardium
B. Myocardium
C. Endocardium
D. Pericardium
Answer: D
Rationale: The pericardium is the double-walled fibrous sac that encloses and protects
the heart, providing lubrication as it beats.
8. Which structure separates the right and left ventricles?
A. Atrial septum
B. Intraventricular septum
C. Interatrial septum
D. Atrioventricular septum
Answer: B
Rationale: The intraventricular septum is the thick wall separating the right and left
ventricles. The interatrial septum separates the atria.
Cardiac Cycle & ECG Waveforms
9. The cardiac cycle's two main phases are:
A. Systole and diastole
B. Depolarization and repolarization
C. Contraction and relaxation
D. Filling and ejection
Answer: A
Rationale: The cardiac cycle consists of systole (contraction/ejection) and diastole
(relaxation/filling).
10. Depolarization is best described as:
A. Cells becoming more negative
B. Cells becoming less negative and contracting
, Page 4 of 72
C. Cells returning to resting state
D. Cells becoming positively charged
Answer: B
Rationale: Depolarization occurs when cardiac cells become less negative, triggering
electrical activation and mechanical contraction.
11. What is the inherent (intrinsic) firing rate of the ventricles?
A. 60 to 100 bpm
B. 40 to 60 bpm
C. 20 to 40 bpm
D. 10 to 20 bpm
Answer: C
Rationale: The ventricles have an intrinsic rate of 20-40 bpm. The SA node fires at 60-
100 bpm, and the AV node at 40-60 bpm.
12. The P wave on an ECG represents:
A. Depolarization of the atria
B. Repolarization of the atria
C. Depolarization of the ventricles
D. Repolarization of the ventricles
Answer: A
Rationale: The P wave represents atrial depolarization—the electrical activation of the
atria leading to atrial contraction.
13. The QRS complex represents:
A. Depolarization of the atria
B. Repolarization of the atria
C. Depolarization of the ventricles
D. Repolarization of the ventricles
Answer: C
Rationale: The QRS complex represents ventricular depolarization—the electrical
activation of the ventricles that triggers contraction.
NWCA CET CERTIFIED EKG TECHNICIAN) EXAM 2026
QUESTIONS LATEST 2026 – 2027 VERSION SOLVED
QUESTIONS & ANSWERS
NWCA CET Exam – Practice Questions
The NWCA CET (Certified EKG Technician) exam covers cardiovascular anatomy, ECG
interpretation, lead placement, arrhythmia recognition, patient preparation, and safety
protocols.
Anatomy & Physiology
1. Which valves open to allow the ventricles to fill with blood during diastole?
A. Aortic and pulmonic valves
B. Tricuspid and mitral valves
C. Mitral and aortic valves
D. Tricuspid and pulmonic valves
Answer: B
Rationale: The tricuspid and mitral (atrioventricular) valves open during ventricular
diastole to allow blood to flow from the atria into the ventricles.
2. The layer of the heart that is damaged during a myocardial infarction (heart
attack) is the:
A. Epicardium
B. Myocardium
C. Endocardium
D. Pericardium
Answer: B
Rationale: The myocardium is the middle muscular layer responsible for contraction. It
is damaged during a heart attack due to oxygen deprivation from blocked coronary
arteries.
, Page 2 of 72
3. The interior lining of the heart is called the:
A. Epicardium
B. Myocardium
C. Endocardium
D. Pericardium
Answer: C
Rationale: The endocardium is the innermost layer lining the chambers and valves. The
epicardium is the outermost layer, and the pericardium is the sac surrounding the heart.
4. The pulmonary veins deliver oxygenated blood to which chamber of the heart?
A. Left atrium
B. Left ventricle
C. Right atrium
D. Right ventricle
Answer: A
Rationale: The pulmonary veins are the only veins that carry oxygenated blood,
transporting it from the lungs to the left atrium.
5. The inferior vena cava returns deoxygenated blood to the heart from:
A. Upper extremities and head
B. The heart muscle itself
C. The lungs
D. The lower part of the body
Answer: D
Rationale: The inferior vena cava carries deoxygenated blood from the lower half of the
body (legs, abdomen, pelvis) back to the right atrium.
6. What is the normal resting heart rate for a healthy adult?
A. 40-50 bpm
B. 60-100 bpm
C. 100-140 bpm
D. 140-180 bpm
Answer: B
, Page 3 of 72
Rationale: Normal resting heart rate is 60-100 beats per minute. Below 60 is
bradycardia; above 100 is tachycardia.
7. The double-walled sac that encloses the heart is called the:
A. Epicardium
B. Myocardium
C. Endocardium
D. Pericardium
Answer: D
Rationale: The pericardium is the double-walled fibrous sac that encloses and protects
the heart, providing lubrication as it beats.
8. Which structure separates the right and left ventricles?
A. Atrial septum
B. Intraventricular septum
C. Interatrial septum
D. Atrioventricular septum
Answer: B
Rationale: The intraventricular septum is the thick wall separating the right and left
ventricles. The interatrial septum separates the atria.
Cardiac Cycle & ECG Waveforms
9. The cardiac cycle's two main phases are:
A. Systole and diastole
B. Depolarization and repolarization
C. Contraction and relaxation
D. Filling and ejection
Answer: A
Rationale: The cardiac cycle consists of systole (contraction/ejection) and diastole
(relaxation/filling).
10. Depolarization is best described as:
A. Cells becoming more negative
B. Cells becoming less negative and contracting
, Page 4 of 72
C. Cells returning to resting state
D. Cells becoming positively charged
Answer: B
Rationale: Depolarization occurs when cardiac cells become less negative, triggering
electrical activation and mechanical contraction.
11. What is the inherent (intrinsic) firing rate of the ventricles?
A. 60 to 100 bpm
B. 40 to 60 bpm
C. 20 to 40 bpm
D. 10 to 20 bpm
Answer: C
Rationale: The ventricles have an intrinsic rate of 20-40 bpm. The SA node fires at 60-
100 bpm, and the AV node at 40-60 bpm.
12. The P wave on an ECG represents:
A. Depolarization of the atria
B. Repolarization of the atria
C. Depolarization of the ventricles
D. Repolarization of the ventricles
Answer: A
Rationale: The P wave represents atrial depolarization—the electrical activation of the
atria leading to atrial contraction.
13. The QRS complex represents:
A. Depolarization of the atria
B. Repolarization of the atria
C. Depolarization of the ventricles
D. Repolarization of the ventricles
Answer: C
Rationale: The QRS complex represents ventricular depolarization—the electrical
activation of the ventricles that triggers contraction.
