Page 1 of 86
NWCA CET (CERTIFIED EKG TECHNICIAN) EXAM WITH VERIFIED
ANSWERS DETAILED RATIONALES GRADED A+
NWCA CET (Certified EKG Technician) Exam
250 Practice Questions with Verified Answers and Detailed
Rationales
Exam Authority: National Workforce Career Association (NWCA)
Credential: Certified EKG Technician (CET)
Exam Format: Multiple Choice; 100 scored items
Time Limit: 120 minutes
Passing Score: 70% (All sections require an individual passing score of 70%)
Content Breakdown: Cardiovascular Anatomy & Physiology (25 items), Basic
Electrophysiology (51 items), Interpretation of Arrhythmias (24 items)
SUMMARIZED 10-POINT EXAM COVERAGE
# Core Exam Domain Key Content Areas Questions
Heart chambers, valves, layers,
Cardiovascular
1 circulation, coronary arteries, great 1–40
Anatomy & Physiology
vessels, pericardium
Cardiac Conduction
SA node, AV node, Bundle of His,
2 System & 41–75
Purkinje fibers, depolarization,
Electrophysiology
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# Core Exam Domain Key Content Areas Questions
repolarization, action potential,
refractory periods
P wave, QRS complex, T wave, PR
ECG Waveforms,
interval, QRS duration, QT interval, ST
3 Intervals & 76–115
segment, R-R interval, 6-second
Measurements
method, 1500 method
Limb leads, precordial leads,
Lead Placement & 12- Einthoven's triangle, Wilson's central
4 116–160
Lead ECG Acquisition terminal, electrode placement,
artifacts, troubleshooting
Sinus rhythms, atrial arrhythmias,
Rhythm Interpretation junctional rhythms, ventricular
5 161–210
& Arrhythmias arrhythmias, heart blocks, pacemaker
rhythms
ST elevation, ST depression, T wave
Myocardial Ischemia,
6 inversion, Q waves, territory 211–225
Injury & Infarction
localization (inferior, anterior, lateral)
Holter monitor indications, patient
Holter Monitoring &
7 instructions, stress test protocols, 226–235
Stress Testing
termination criteria
Patient identification, skin
Patient Preparation, preparation, electrode application,
8 236–242
Care & Safety patient education, emergency
response
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# Core Exam Domain Key Content Areas Questions
Standardization, paper speed, voltage
EKG Equipment,
calibration, somatic tremor,
9 Troubleshooting & 243–247
wandering baseline, electrical
Artifacts
interference
Scope of practice, patient
Medical Law, Ethics &
10 confidentiality, informed consent, 248–250
Professional Practice
negligence, ethical conduct
SECTION 1: CARDIOVASCULAR ANATOMY & PHYSIOLOGY
Questions 1–40
1. Which valves open during diastole to allow the ventricles to fill with blood?
A) Aortic and Pulmonic valves
B) Tricuspid and Mitral valves
C) Mitral and Aortic valves
D) Tricuspid and Pulmonic valves
Correct Answer: B
Rationale: The atrioventricular (AV) valves—the tricuspid valve on the right and the
mitral valve on the left—open during diastole to allow blood to flow from the atria into
the ventricles .
2. Which layer of the heart is damaged during a heart attack?
A) Epicardium
B) Myocardium
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C) Endocardium
D) Pericardium
Correct Answer: B
Rationale: The myocardium is the muscular middle layer of the heart wall that contracts
to pump blood. During a myocardial infarction (heart attack), this muscle layer is
damaged due to ischemia .
3. The inferior vena cava returns deoxygenated blood to the heart from which part
of the body?
A) Upper part of the body
B) Lower part of the body
C) Lungs
D) Brain
Correct Answer: B
Rationale: The inferior vena cava carries deoxygenated blood from the lower body
(abdomen, pelvis, and legs) back to the right atrium. The superior vena cava returns
blood from the upper body .
4. The pulmonary veins deliver oxygenated blood to which chamber of the heart?
A) Right atrium
B) Right ventricle
C) Left atrium
D) Left ventricle
Correct Answer: C
Rationale: The pulmonary veins carry oxygenated blood from the lungs to the left
atrium, which then pumps it into the left ventricle for systemic circulation .
5. What is the intrinsic firing rate of the ventricles?
NWCA CET (CERTIFIED EKG TECHNICIAN) EXAM WITH VERIFIED
ANSWERS DETAILED RATIONALES GRADED A+
NWCA CET (Certified EKG Technician) Exam
250 Practice Questions with Verified Answers and Detailed
Rationales
Exam Authority: National Workforce Career Association (NWCA)
Credential: Certified EKG Technician (CET)
Exam Format: Multiple Choice; 100 scored items
Time Limit: 120 minutes
Passing Score: 70% (All sections require an individual passing score of 70%)
Content Breakdown: Cardiovascular Anatomy & Physiology (25 items), Basic
Electrophysiology (51 items), Interpretation of Arrhythmias (24 items)
SUMMARIZED 10-POINT EXAM COVERAGE
# Core Exam Domain Key Content Areas Questions
Heart chambers, valves, layers,
Cardiovascular
1 circulation, coronary arteries, great 1–40
Anatomy & Physiology
vessels, pericardium
Cardiac Conduction
SA node, AV node, Bundle of His,
2 System & 41–75
Purkinje fibers, depolarization,
Electrophysiology
,Page 2 of 86
# Core Exam Domain Key Content Areas Questions
repolarization, action potential,
refractory periods
P wave, QRS complex, T wave, PR
ECG Waveforms,
interval, QRS duration, QT interval, ST
3 Intervals & 76–115
segment, R-R interval, 6-second
Measurements
method, 1500 method
Limb leads, precordial leads,
Lead Placement & 12- Einthoven's triangle, Wilson's central
4 116–160
Lead ECG Acquisition terminal, electrode placement,
artifacts, troubleshooting
Sinus rhythms, atrial arrhythmias,
Rhythm Interpretation junctional rhythms, ventricular
5 161–210
& Arrhythmias arrhythmias, heart blocks, pacemaker
rhythms
ST elevation, ST depression, T wave
Myocardial Ischemia,
6 inversion, Q waves, territory 211–225
Injury & Infarction
localization (inferior, anterior, lateral)
Holter monitor indications, patient
Holter Monitoring &
7 instructions, stress test protocols, 226–235
Stress Testing
termination criteria
Patient identification, skin
Patient Preparation, preparation, electrode application,
8 236–242
Care & Safety patient education, emergency
response
,Page 3 of 86
# Core Exam Domain Key Content Areas Questions
Standardization, paper speed, voltage
EKG Equipment,
calibration, somatic tremor,
9 Troubleshooting & 243–247
wandering baseline, electrical
Artifacts
interference
Scope of practice, patient
Medical Law, Ethics &
10 confidentiality, informed consent, 248–250
Professional Practice
negligence, ethical conduct
SECTION 1: CARDIOVASCULAR ANATOMY & PHYSIOLOGY
Questions 1–40
1. Which valves open during diastole to allow the ventricles to fill with blood?
A) Aortic and Pulmonic valves
B) Tricuspid and Mitral valves
C) Mitral and Aortic valves
D) Tricuspid and Pulmonic valves
Correct Answer: B
Rationale: The atrioventricular (AV) valves—the tricuspid valve on the right and the
mitral valve on the left—open during diastole to allow blood to flow from the atria into
the ventricles .
2. Which layer of the heart is damaged during a heart attack?
A) Epicardium
B) Myocardium
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C) Endocardium
D) Pericardium
Correct Answer: B
Rationale: The myocardium is the muscular middle layer of the heart wall that contracts
to pump blood. During a myocardial infarction (heart attack), this muscle layer is
damaged due to ischemia .
3. The inferior vena cava returns deoxygenated blood to the heart from which part
of the body?
A) Upper part of the body
B) Lower part of the body
C) Lungs
D) Brain
Correct Answer: B
Rationale: The inferior vena cava carries deoxygenated blood from the lower body
(abdomen, pelvis, and legs) back to the right atrium. The superior vena cava returns
blood from the upper body .
4. The pulmonary veins deliver oxygenated blood to which chamber of the heart?
A) Right atrium
B) Right ventricle
C) Left atrium
D) Left ventricle
Correct Answer: C
Rationale: The pulmonary veins carry oxygenated blood from the lungs to the left
atrium, which then pumps it into the left ventricle for systemic circulation .
5. What is the intrinsic firing rate of the ventricles?
