CBET Ultimate 3

Question 1

When testing ground wire resistance on patient care equipment, AAMI ES1 specifies the resistance should not exceed:

Accepted Answer

0.1 ohm

Answer

AAMI ES1 specifies that ground wire resistance from chassis to the ground pin of the power cord should not exceed 0.1 ohm.

Question 2

A pulse oximeter reads SpO2 at 85% but the patient appears clinically stable. What artifact is MOST likely causing a falsely low reading?

Accepted Answer

Motion artifact or poor perfusion at the probe site

Answer

Motion and poor peripheral perfusion are the most common causes of falsely low SpO2 readings with pulse oximetry.

Question 3

Which sterilization method is MOST appropriate for heat-sensitive flexible endoscopes?

Accepted Answer

Ethylene oxide (EtO) gas sterilization

Answer

Ethylene oxide sterilizes at low temperatures (~55°C), making it suitable for heat- and moisture-sensitive devices like flexible endoscopes.

Question 4

In an infusion pump, what is the primary purpose of the air-in-line detector?

Accepted Answer

To detect air bubbles that could cause air embolism

Answer

The air-in-line detector uses ultrasonic sensing to stop the pump when air bubbles are detected, preventing venous air embolism.

Question 5

What is the function of a ballast in fluorescent surgical lighting?

Accepted Answer

To limit current and stabilize the arc discharge in the lamp

Answer

The ballast provides starting voltage and then limits current to prevent the lamp's negative resistance characteristic from causing a runaway increase in current.

CBET - Certified Biomedical Equipment Technician Practice Test

CBET - Certified Biomedical Equipment Technician Practice Test

CBET Ultimate 3