CBET Ultimate 5

Question 1

What is the primary difference between a Class I and Class II medical device under FDA classification?

Accepted Answer

Class I requires general controls only; Class II requires special controls such as performance standards

Answer

FDA Class I devices are subject to general controls only, while Class II devices require special controls (e.g., performance standards, post-market surveillance) to ensure safety and effectiveness.

Question 2

A physiological pressure transducer requires zeroing before use. Why is this step necessary?

Accepted Answer

To establish atmospheric pressure as the reference baseline, eliminating hydrostatic and offset errors

Answer

Zeroing the transducer at the level of the right atrium sets atmospheric pressure as the zero reference, ensuring accurate hemodynamic readings.

Question 3

Which parameter does a capnograph measure, and what waveform phase indicates end-tidal CO2?

Accepted Answer

CO2 concentration in exhaled breath; the alveolar plateau (Phase III)

Answer

Capnography measures exhaled CO2, and the end-tidal CO2 (EtCO2) value is read at the alveolar plateau (Phase III) of the capnogram waveform.

Question 4

During a PM on a hospital bed, you discover the brake does not engage fully. What is the correct action?

Accepted Answer

Tag the bed out-of-service and remove from patient use pending repair

Answer

A bed with a failed brake poses a fall and injury risk; it must be immediately tagged out-of-service and removed from clinical use until repaired and verified.

Question 5

What is the purpose of a Faraday cage in an MRI suite?

Accepted Answer

To shield external RF signals that would corrupt MRI image quality

Answer

The RF-shielded Faraday cage prevents external radiofrequency interference from entering the MRI room and corrupting the weak MR signal during image acquisition.

CBET - Certified Biomedical Equipment Technician Practice Test

CBET - Certified Biomedical Equipment Technician Practice Test

CBET Ultimate 5