Certified EKG Technician (CET) Exam — Practice
EKG Acquisition: practice questions
Our EKG tech (CET) bank has 102 questions on this topic. Here are 5 of them with answers; the full mock exam draws from every topic, like the real one.
Question 1
If a paper system is used, what is done with the completed EKG strip?
- Fax it to the patient's employer
- Mount it in the patient's chart
- Leave it on the machine
- Give it to the patient to keep
Show the answer
B. Mount it in the patient's chart — The 2026 plan task 2L: mount the completed strip to the chart if a paper system is used.
Question 2
A patient with Parkinson's disease has constant tremor artifact. What may help?
- Move limb electrodes toward the trunk
- Place electrodes on the hands
- Skip the limb leads
- Increase the paper speed only
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A. Move limb electrodes toward the trunk — Placing limb electrodes on the upper arms/thighs or torso reduces tremor artifact; document any change.
Question 3
How many electrodes are used for a standard 12-lead EKG?
- 5
- 12
- 10
- 3
Show the answer
C. 10 — Four limb electrodes and six chest electrodes produce 12 leads.
Question 4
In the AHA color code, which color is the right arm electrode?
- White
- Green
- Black
- Red
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A. White — AHA: RA white, LA black, RL green, LL red.
Question 5
Where is V5 placed?
- Left anterior axillary line, level with V4
- Left midaxillary line, level with V4
- Right anterior axillary line
- Left midclavicular line, 5th intercostal space
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A. Left anterior axillary line, level with V4 — V5: same horizontal level as V4 at the anterior axillary line.