Electronics and Electrical Safety Flashcards
6 cards from real CBET practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Electronics and Electrical Safety flashcards as text
What does the acronym GFCI stand for, and what is its primary function in healthcare facilities?
Answer: Ground Fault Circuit Interrupter - detects imbalance between hot and neutral conductors and disconnects power
A GFCI monitors current flow between hot and neutral conductors. If it detects an imbalance of approximately 5 milliamps, it disconnects power within milliseconds.
In troubleshooting a medical device power supply, you measure 0V DC output but 120V AC input is present. Which component is most likely failed?
Answer: Bridge rectifier or filter capacitor
With AC input present but no DC output, the AC-to-DC conversion stage has failed. The bridge rectifier or filter capacitor are the most likely culprits.
What is the minimum recommended testing frequency for electrical safety inspections of patient care equipment according to NFPA 99?
Answer: Annually
NFPA 99 recommends electrical safety testing at least annually, though more frequent testing may be required based on risk assessment.
What is the purpose of a snubber circuit across relay contacts in medical equipment?
Answer: To suppress voltage spikes caused by inductive load switching
A snubber circuit suppresses voltage transients generated when relay contacts open and interrupt current to an inductive load.
What does the term 'equipotential grounding' mean in the context of a hospital operating room?
Answer: All conductive surfaces within patient reach are connected to a common ground point
Equipotential grounding ensures that all conductive surfaces within patient reach are bonded to a single ground reference point, eliminating dangerous potential differences.
Which type of electrical safety analyzer measurement verifies that a medical device will not deliver hazardous current through the patient connection?
Answer: Patient leakage current test
The patient leakage current test measures current that could flow from patient connections through the patient to ground.