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

Replace the ECG cable

Answer

Replace the monitor

Answer

Recalibrate the amplifier

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

FDA

Answer

OSHA

Answer

EPA

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

It was absorbed by the patient's skin

Answer

It was reflected back into the power supply

Answer

It was lost due to electrode impedance mismatch only

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

To increase voltage for medical equipment

Answer

To reduce power consumption

Answer

To eliminate harmonic distortion

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

Broken inspiratory valve

Answer

Faulty pressure transducer

Answer

Worn compressor bearings

Question 6

According to NFPA 99, which category of electrical system must power life-safety equipment within 10 seconds of a power outage?

Accepted Answer

Category 1 (Essential Electrical System - Life Safety Branch)

Answer

Category 2 (Critical Branch)

Answer

Category 3 (Equipment Branch)

Answer

Category 4 (General Power)

Question 7

What does a line isolation monitor (LIM) alarm indicate in an OR?

Accepted Answer

The hazard current from line-to-ground fault has reached a threshold (typically 2 mA)

Answer

Total power failure in the isolated power system

Answer

Excessive voltage on the isolated circuit

Answer

A ground wire is broken