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Free CCT Practice Questions

10 free, exam-style Certified Calibration Technician (CCT) practice questions with answers and explanations. No signup required. Work through them below, then take the full free CCT practice test to study every exam domain.

Question 1

A rhythm strip shows P waves marching out at a regular rate. The PR interval lengthens with each successive beat until one P wave appears with no QRS following it, after which the cycle repeats. This rhythm is:

  1. Second-degree AV block, Mobitz II
  2. Second-degree AV block, Mobitz I (Wenckebach)
  3. First-degree AV block with a consistently prolonged PR interval
  4. Third-degree block with complete AV dissociation of P and QRS
Show answer & explanation

Correct answer: B - Second-degree AV block, Mobitz I (Wenckebach)

Question 2

An ECG shows an irregularly irregular ventricular rhythm with a chaotic, undulating baseline and no identifiable P waves preceding the QRS complexes. This rhythm is MOST consistent with:

  1. Atrial flutter with regular sawtooth flutter waves between complexes
  2. Multifocal atrial tachycardia with at least three P-wave shapes
  3. Atrial fibrillation
  4. Respiratory sinus arrhythmia with normal upright P waves
Show answer & explanation

Correct answer: C - Atrial fibrillation

Question 3

While a patient is on the monitor, the tracing abruptly becomes a chaotic waveform with no organized QRS complexes, and the patient is unresponsive with no pulse. After calling for help, the technician's MOST appropriate immediate action is to:

  1. Reposition the limb electrodes and cables to rule out motion artifact first
  2. Begin chest compressions and prepare for defibrillation
  3. Document the rhythm in the record and continue to observe the monitor
  4. Withhold compressions and administer a beta blocker to slow the rhythm
Show answer & explanation

Correct answer: B - Begin chest compressions and prepare for defibrillation

Question 4

A 12-lead ECG demonstrates ST-segment elevation in leads II, III, and aVF, with reciprocal ST depression in leads I and aVL. These findings localize an acute myocardial infarction to which wall of the left ventricle?

  1. Anterior wall, supplied by the left anterior descending artery
  2. Lateral wall, supplied by the left circumflex artery
  3. Septal wall, reflected by changes in leads V1 and V2
  4. Inferior wall, commonly supplied by the right coronary artery
Show answer & explanation

Correct answer: D - Inferior wall, commonly supplied by the right coronary artery

Question 5

A 12-lead ECG shows a QRS duration of 0.14 seconds with an rSR' ("rabbit ear") pattern in lead V1 and a wide, slurred S wave in leads I and V6. This pattern indicates:

  1. Left bundle branch block, with a broad monophasic R wave in V6
  2. Right bundle branch block, an intraventricular conduction delay
  3. Left ventricular hypertrophy meeting precordial voltage criteria
  4. Wolff-Parkinson-White pre-excitation with a short PR and delta wave
Show answer & explanation

Correct answer: B - Right bundle branch block, an intraventricular conduction delay

Question 6

When acquiring a standard resting 12-lead ECG, the V1 chest electrode is correctly placed at the:

  1. Fourth intercostal space at the right sternal border
  2. Fourth intercostal space just to the left of the sternal border
  3. Fifth intercostal space along the left midclavicular line
  4. Fifth intercostal space at the left anterior axillary line
Show answer & explanation

Correct answer: A - Fourth intercostal space at the right sternal border

Question 7

A 12-lead tracing shows a fine, uniform, regular fuzziness affecting every lead at a constant frequency, while the underlying complexes remain identifiable. The MOST likely cause is:

  1. Patient shivering or somatic muscle tremor during the recording
  2. A single loose or detached electrode with poor skin contact
  3. Alternating current (60-cycle) interference
  4. A slowly drifting, wandering baseline from inadequate skin prep
Show answer & explanation

Correct answer: C - Alternating current (60-cycle) interference

Question 8

During a treadmill exercise stress test, the technician notes that the patient's systolic blood pressure is steadily DROPPING as the workload increases, although the patient denies symptoms. The MOST appropriate action is to:

  1. Notify the supervising physician, as this may indicate the test should stop
  2. Increase the treadmill speed and grade to reach target heart rate sooner
  3. Continue the current stage and simply recheck the pressure a few minutes later
  4. Move the patient onto a bicycle ergometer to lower the overall workload
Show answer & explanation

Correct answer: A - Notify the supervising physician, as this may indicate the test should stop

Question 9

After completing a resting ECG, a patient asks the cardiographic technician, "Does my tracing show that I had a heart attack?" The MOST appropriate response is to:

  1. Reassure the patient that the tracing appears entirely normal to you
  2. Explain that the physician will review the ECG and discuss results
  3. Point out which segments of the tracing look abnormal to the patient
  4. Offer a basic interpretation, since you are the one who recorded it
Show answer & explanation

Correct answer: B - Explain that the physician will review the ECG and discuss results

Question 10

A physician wants to capture the rhythm of a patient who reports brief palpitations occurring only once or twice a month. Which ambulatory monitoring approach is MOST appropriate?

  1. A patient-activated cardiac event monitor worn over several weeks
  2. A 24-hour continuous Holter monitor worn for a single day
  3. A standard resting 12-lead ECG repeated at each clinic visit
  4. An exercise treadmill stress test using the standard Bruce protocol
Show answer & explanation

Correct answer: A - A patient-activated cardiac event monitor worn over several weeks

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