CBET Ultimate 2

Question 1

A patient monitor displays an ECG waveform with excessive 60 Hz interference. What is the FIRST troubleshooting step?

Accepted Answer

Check patient lead connections and skin preparation

Answer

Poor electrode contact and skin preparation are the most common causes of 60 Hz artifact before replacing hardware.

Question 2

Which regulatory body requires biomedical equipment technicians to maintain a preventive maintenance program in US hospitals?

Accepted Answer

The Joint Commission (TJC)

Answer

The Joint Commission requires healthcare organizations to maintain an equipment management program including preventive maintenance.

Question 3

A defibrillator delivers energy via a capacitor. If the capacitor stores 360 J but only 200 J is delivered, what happened to the remaining energy?

Accepted Answer

It was dissipated as heat in the inductor and internal resistance

Answer

Energy not delivered to the patient is dissipated as heat within the discharge circuit components including the inductor and internal resistance.

Question 4

What is the purpose of isolation transformers in patient care areas?

Accepted Answer

To prevent line-to-ground shock hazards in wet environments

Answer

Isolation transformers break the direct connection to earth ground, preventing current flow through a patient in the event of a single fault.

Question 5

A ventilator's flow sensor reads inconsistently. Which component is MOST likely causing this in a heated wire flow sensor?

Accepted Answer

Contamination or condensation on the sensing element

Answer

Moisture and secretions contaminating the heated wire element disrupt thermal dissipation, causing inaccurate flow readings.

CBET - Certified Biomedical Equipment Technician Practice Test