10 free, exam-style Certified Biomedical Equipment Technician (CBET) practice questions with answers and explanations. No signup required. Work through them below, then take the full free CBET practice test to study every exam domain.
While verifying the performance of an invasive arterial blood pressure monitor, a technician observes the dicrotic notch on the displayed pressure waveform. This notch corresponds to:
Correct answer: B - Closure of the aortic valve
A technician is performing an electrical safety test on a device that makes a direct electrical connection to the heart, which requires a Type CF applied part. Under IEC 60601-1, the maximum allowable patient leakage current for a Type CF applied part in the normal (no-fault) condition is:
Correct answer: A - 10 µA
A component in a DC circuit has 12 volts measured across it while 3 amperes of current flow through it. Applying Ohm's law, the component's resistance is:
Correct answer: C - 4 Ω
The hypoxic guard (oxygen ratio controller) on an anesthesia machine is designed to prevent the clinician from delivering a fresh gas mixture that contains:
Correct answer: B - Too low a concentration of oxygen
A pulse oximeter determines oxygen saturation by comparing how oxygenated and deoxygenated hemoglobin absorb two specific wavelengths of light. The wavelengths used are:
Correct answer: D - Red and infrared light
On a monopolar electrosurgical unit, the return electrode monitoring (REM) system continuously checks the quality of contact between the dispersive (return) pad and the patient. Its PRIMARY purpose is to:
Correct answer: A - Prevent burns at the return electrode site
A technician investigates a bedside monitor showing a steady, fine, regular 60 Hz interference on every ECG lead; the same pattern is present on several other monitors in the same unit. The MOST likely cause is:
Correct answer: C - Interference from nearby AC power lines
A defibrillator set to 200 J is discharged several times into a defibrillator/energy analyzer and delivers only about 150 J each time. Given that delivered energy should fall within roughly ±15% of the set value, the technician should conclude that:
Correct answer: D - The device is faulty and must be removed from service
A volumetric infusion pump is returned to the clinical engineering shop three times for the same reported 'malfunction.' Each time it passes all functional and electrical-safety tests, and review shows that staff had repeatedly loaded the IV administration set incorrectly. This situation is BEST classified as:
Correct answer: A - A use error
To reduce cybersecurity risk, a hospital places its networked infusion pumps and patient monitors on a dedicated VLAN that is isolated from the general staff and guest networks. This practice is BEST described as:
Correct answer: B - Network segmentation
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