CBET - Certified Biomedical Equipment Technician Medical Equipment Function Questions and Answers

Question 1

An electrosurgical unit (ESU) is being used in monopolar mode.
For the electrical circuit to function correctly and safely, which component is essential to complete the circuit by returning the current to the generator?

Accepted Answer

A dispersive patient return electrode

Answer

A bipolar forceps attachment

Answer

An active electrode with a smaller tip

Answer

An isolated power system

Question 2

A hemodialysis machine is being used to treat a patient with renal failure. The primary mechanism by which waste products like urea are removed from the blood into the dialysate is:

Accepted Answer

Diffusion

Answer

Osmosis

Answer

Ultrafiltration

Answer

Convection

Question 3

When comparing modern biphasic defibrillators to older monophasic models, what is the primary functional advantage of using a biphasic waveform?

Accepted Answer

It achieves the same or higher defibrillation success at a lower energy level.

Answer

It requires a much longer shock duration to be effective.

Answer

It can only be used with paddle electrodes, not adhesive pads.

Answer

It eliminates the need to measure patient impedance before the shock.

Question 4

A technician is explaining the function of an anesthesia machine to a new colleague. What is the primary role of the vaporizer component within the machine?

Accepted Answer

To convert liquid anesthetic agent into a precisely controlled vapor.

Answer

To absorb excess carbon dioxide from the breathing circuit.

Answer

To mechanically ventilate the patient's lungs with oxygen.

Answer

To blend oxygen and nitrous oxide in specific ratios.

Question 5

A new infusion pump is delivered to the hospital. The specifications state it uses a peristaltic mechanism. How does this type of pump move fluid through the IV tubing?

Accepted Answer

By using rotating rollers or 'fingers' to sequentially compress the tubing.

Answer

By using a motor to precisely advance a plunger within a syringe.

Answer

By creating a pressure differential with a vacuum system.

Answer

By using gravity and controlling the flow with a simple roller clamp.

Question 6

In a clinical laboratory, a centrifuge is used to process a whole blood sample collected in a tube with an anticoagulant. The primary function of the centrifuge in this application is to:

Accepted Answer

Separate components like plasma, platelets, and red cells based on density.

Answer

Mix the blood with reagents for chemical analysis.

Answer

Measure the electrical conductivity of the blood cells.

Answer

Heat the sample to a specific temperature for incubation.

An electrosurgical unit (ESU) is being used in monopolar mode.For the electrical circuit to function correctly and safely, which component is essential to complete the circuit by returning the current to the generator?

An electrosurgical unit (ESU) is being used in monopolar mode.
For the electrical circuit to function correctly and safely, which component is essential to complete the circuit by returning the current to the generator?