EKG CLEP EXAM REVIEW QUESTIONS
WITH VERIFIED ANSWERS.NEW
UPDATE. JUST RELEASED
1. In a standard 12-lead EKG, where should the V1 electrode be placed?
A. 4th intercostal space at the right sternal border
B. 4th intercostal space at the left sternal border
C. 5th intercostal space at the midclavicular line
D. 2nd intercostal space at the right sternal border
Answer: A
Conceptual Explanation: V1 is positioned in the fourth intercostal space just to the right
of the sternum.
2. What is the duration of a normal PR interval?
A. 0.04 to 0.10 seconds
B. 0.20 to 0.36 seconds
C. 0.12 to 0.20 seconds
D. 0.06 to 0.12 seconds
Answer: C
,Conceptual Explanation: A normal PR interval measures from 0.12 to 0.20 seconds (3 to 5
small boxes).
3. Which rhythm is characterized by a ‘sawtooth’ appearance of P waves?
A. Atrial Fibrillation
B. Atrial Flutter
C. Ventricular Tachycardia
D. Junctional Rhythm
Answer: B
Conceptual Explanation: Atrial Flutter is distinguished by rapid, regular atrial oscillations
called flutter waves (F-waves) that look like a saw blade.
4. The QRS complex represents which physiological event?
A. Atrial depolarization
B. Ventricular depolarization
C. Atrial repolarization
D. Ventricular repolarization
Answer: B
Conceptual Explanation: The QRS complex corresponds to the electrical activation
(depolarization) of the ventricles.
, 5. On standard EKG paper, one small box represents how much time?
A. 0.20 seconds
B. 0.04 seconds
C. 0.01 seconds
D. 0.40 seconds
Answer: B
Conceptual Explanation: One small square on the horizontal axis of EKG paper equals
0.04 seconds.
6. Which lead is considered a bipolar lead?
A. Lead aVR
B. Lead II
C. Lead V1
D. Lead aVF
Answer: B
Conceptual Explanation: Leads I, II, and III are bipolar leads because they measure the
difference in electrical potential between two specific electrodes.
7. A 1st-degree AV block is identified by which EKG finding?
A. Progressive lengthening of the PR interval until a QRS is dropped
WITH VERIFIED ANSWERS.NEW
UPDATE. JUST RELEASED
1. In a standard 12-lead EKG, where should the V1 electrode be placed?
A. 4th intercostal space at the right sternal border
B. 4th intercostal space at the left sternal border
C. 5th intercostal space at the midclavicular line
D. 2nd intercostal space at the right sternal border
Answer: A
Conceptual Explanation: V1 is positioned in the fourth intercostal space just to the right
of the sternum.
2. What is the duration of a normal PR interval?
A. 0.04 to 0.10 seconds
B. 0.20 to 0.36 seconds
C. 0.12 to 0.20 seconds
D. 0.06 to 0.12 seconds
Answer: C
,Conceptual Explanation: A normal PR interval measures from 0.12 to 0.20 seconds (3 to 5
small boxes).
3. Which rhythm is characterized by a ‘sawtooth’ appearance of P waves?
A. Atrial Fibrillation
B. Atrial Flutter
C. Ventricular Tachycardia
D. Junctional Rhythm
Answer: B
Conceptual Explanation: Atrial Flutter is distinguished by rapid, regular atrial oscillations
called flutter waves (F-waves) that look like a saw blade.
4. The QRS complex represents which physiological event?
A. Atrial depolarization
B. Ventricular depolarization
C. Atrial repolarization
D. Ventricular repolarization
Answer: B
Conceptual Explanation: The QRS complex corresponds to the electrical activation
(depolarization) of the ventricles.
, 5. On standard EKG paper, one small box represents how much time?
A. 0.20 seconds
B. 0.04 seconds
C. 0.01 seconds
D. 0.40 seconds
Answer: B
Conceptual Explanation: One small square on the horizontal axis of EKG paper equals
0.04 seconds.
6. Which lead is considered a bipolar lead?
A. Lead aVR
B. Lead II
C. Lead V1
D. Lead aVF
Answer: B
Conceptual Explanation: Leads I, II, and III are bipolar leads because they measure the
difference in electrical potential between two specific electrodes.
7. A 1st-degree AV block is identified by which EKG finding?
A. Progressive lengthening of the PR interval until a QRS is dropped
