CABT Healthcare and Electrical Safety 4

Question 1

A GFCI (Ground Fault Circuit Interrupter) trips when it detects a current imbalance greater than:

Accepted Answer

4–6 mA

Answer

A GFCI monitors the difference between hot and neutral currents and trips when the imbalance exceeds approximately 4–6 mA, indicating ground fault current.

Question 2

In the context of electrical safety, 'macroshock' is defined as current entering the body:

Accepted Answer

Through the intact skin surface

Answer

Macroshock refers to electric current entering and exiting through the skin surface, requiring higher currents (mA range) to cause fibrillation.

Question 3

Which color is used in the US to identify the grounding conductor in a standard electrical cord?

Accepted Answer

Green or bare copper

Answer

In the United States, the protective ground conductor is identified by green insulation or left as bare copper wire.

Question 4

When testing total patient leakage current on an ECG monitor connected to a patient simulator, the technician should measure:

Accepted Answer

Current from all patient-applied parts to ground collectively

Answer

Total patient leakage current is measured by summing the current from all applied parts (leads) to ground under worst-case conditions.

Question 5

Under NFPA 99, receptacles in a Category 1 (critical care) patient care area must be:

Accepted Answer

Hospital-grade and connected to the equipment grounding system

Answer

NFPA 99 requires hospital-grade receptacles in Category 1 areas to ensure reliable grounding and mechanical integrity under clinical conditions.

(CABT) Certified Associate in Biomedical Technology Practice Test

(CABT) Certified Associate in Biomedical Technology Practice Test

CABT Healthcare and Electrical Safety 4