CBET Preventive Maintenance and Calibration 2

Question 1

What is the acceptable chassis leakage current limit for a Class I medical device under normal conditions per AAMI/IEC 60601-1?

Accepted Answer

500 µA

Answer

IEC 60601-1 limits chassis (enclosure) leakage to 500 µA under normal conditions to protect users and patients.

Question 2

During a PM on a defibrillator, the BMET checks delivered energy. What instrument is used to measure this?

Accepted Answer

Defibrillator analyzer

Answer

A defibrillator analyzer measures delivered energy in joules, charge time, and waveform characteristics during PM testing.

Question 3

A ventilator's tidal volume reading drifts 15% low over three months. What is the most appropriate first action?

Accepted Answer

Recalibrate the flow sensor per the service manual

Answer

Calibrating the flow sensor restores accurate tidal volume delivery; compensation by adjusting settings masks the underlying inaccuracy.

Question 4

Which PM task is specific to electrosurgical units (ESUs)?

Accepted Answer

Testing return electrode contact quality monitoring (RECM)

Answer

RECM testing verifies the ESU will alarm and cut power if the return electrode contact degrades, preventing patient burns.

Question 5

What is the purpose of a 'loaner pool' in a biomed equipment management program?

Accepted Answer

To provide substitute devices while primary equipment is under repair or PM

Answer

A loaner pool ensures clinical areas always have a functioning device available when their primary unit is taken offline for maintenance.

CBET - Certified Biomedical Equipment Technician Practice Test