NWCA CERTIFIED EKG TECHNICIAN (CET) CERTIFICATION ACTUAL EXAM PREP 2026 ALL QUESTIONS AND CORRECT DETAILED ANSWERS WITH RATIONALES ALREADY A GRADED WITH EXPERT FEEDBACK |NEW AND REVISED

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NWCA CERTIFIED EKG TECHNICIAN (CET)
CERTIFICATION ACTUAL EXAM PREP 2026 ALL
QUESTIONS AND CORRECT DETAILED
ANSWERS WITH RATIONALES ALREADY A
GRADED WITH EXPERT FEEDBACK |NEW AND
REVISED



1. The EKG technician is preparing to perform a 12-lead EKG on a
patient. Which of the following structures is responsible for initiating the
electrical impulse that sets the normal heart rate?
 A. Atrioventricular (AV) node
 B. Bundle of His
 C. Purkinje fibers
 D. Sinoatrial (SA) node
Rationale: The sinoatrial (SA) node is the heart's natural pacemaker.
It initiates the electrical impulse that travels through the atria, causing
them to contract, and sets the normal heart rate. The AV node delays
the impulse, the Bundle of His conducts it to the ventricles, and
Purkinje fibers distribute it throughout the ventricular myocardium.
2. A patient's EKG tracing shows a heart rate of 75 beats per minute
with a regular rhythm. The P waves are upright and uniform, each
followed by a QRS complex. This rhythm is most consistent with:
 A. Atrial fibrillation
 B. Normal sinus rhythm

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 C. Sinus tachycardia
 D. Sinus bradycardia
Rationale: Normal sinus rhythm is characterized by a heart rate of 60-
100 beats per minute, regular rhythm, upright and uniform P waves,
and a P wave preceding each QRS complex. Atrial fibrillation has no
discernible P waves; sinus tachycardia has a rate >100; sinus
bradycardia has a rate <60.
3. Which of the following is the correct placement for the V1 electrode
in a standard 12-lead EKG?
 A. Fifth intercostal space, left midclavicular line
 B. Fourth intercostal space, right sternal border
 C. Fourth intercostal space, left sternal border
 D. Fifth intercostal space, left anterior axillary line
Rationale: V1 is placed in the fourth intercostal space at the right
sternal border. V2 is placed at the fourth intercostal space at the left
sternal border. V4 is placed at the fifth intercostal space, left
midclavicular line. V5 is placed at the fifth intercostal space, left
anterior axillary line.
4. A patient is scheduled for a stress test. The EKG technician should
instruct the patient to:
 A. Eat a heavy meal 30 minutes before the test
 B. Avoid caffeine and tobacco for at least 12 hours before the
test
 C. Take all prescribed medications immediately before the test
 D. Wear tight-fitting clothing to ensure electrode adherence
Rationale: For stress testing, patients should avoid caffeine and
tobacco for at least 12 hours before the test, as these substances can

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affect heart rate and blood pressure. Patients should follow specific
medication instructions from their physician, avoid heavy meals
beforehand, and wear loose, comfortable clothing.
5. The EKG technician is performing a 12-lead EKG and notices
wandering baseline on the tracing. Which of the following is the MOST
likely cause of this artifact?
 A. Patient movement
 B. Poor electrode contact or loose leads
 C. Electrical interference
 D. Muscle tremors
Rationale: Wandering baseline is typically caused by poor electrode
contact, loose leads, or dirty electrodes. Patient movement causes
somatic tremor artifact. Electrical interference appears as a 60-cycle
(AC) interference pattern. Muscle tremors cause fine, irregular
baseline fluctuations.
6. Which valves open and allow the ventricles to fill with blood during
diastole?
 A. Aortic and pulmonic valves
 B. Tricuspid and mitral valves
 C. Tricuspid and aortic valves
 D. Mitral and pulmonic valves
Rationale: The tricuspid and mitral (atrioventricular) valves open
during ventricular diastole to allow blood to flow from the atria into
the ventricles. The aortic and pulmonic (semilunar) valves open
during ventricular systole to allow blood to be ejected into the great
vessels.

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7. A patient's EKG tracing shows a heart rate of 110 beats per minute
with regular rhythm. The P waves are upright and uniform, and each P
wave is followed by a QRS complex. This rhythm is best described as:
 A. Normal sinus rhythm
 B. Sinus bradycardia
 C. Sinus tachycardia
 D. Atrial fibrillation
Rationale: Sinus tachycardia is characterized by a heart rate greater
than 100 beats per minute (typically 101-160) with a regular rhythm,
upright and uniform P waves, and a P wave preceding each QRS
complex. Normal sinus rhythm is 60-100 bpm; sinus bradycardia is
<60 bpm.
8. The EKG technician is preparing to apply electrodes to a patient with
a right-sided amputation. Which of the following is the appropriate
action?
 A. Place electrodes on the left side only and document the
modification
 B. Place electrodes on the remaining limb as close to the
standard position as possible and document the modification
 C. Cancel the EKG and refer the patient to a different facility
 D. Place electrodes on the torso in the same relative position as the
limb would have been
Rationale: For patients with amputations, electrodes should be placed
on the remaining limb as close to the standard position as possible.
The modification should be clearly documented on the EKG tracing.
Alternative placements (e.g., torso) may be used if necessary, but
should also be documented.