BTC Medical Equipment Maintenance 2

Question 1

When performing preventive maintenance on a defibrillator, which energy output tolerance is typically acceptable during testing?

Accepted Answer

±15% of the selected energy

Answer

Defibrillators are generally accepted within ±15% of the selected energy output per AAMI DF80 standards.

Question 2

A ventilator's flow sensor is reading inconsistently. What is the FIRST corrective action a biomedical technician should take?

Accepted Answer

Clean or zero-calibrate the flow sensor per manufacturer protocol

Answer

Flow sensors are prone to contamination and drift, so cleaning and zero-calibration should be attempted before replacement.

Question 3

Which standard governs the electrical safety testing of medical equipment in the United States?

Accepted Answer

AAMI ES60601-1

Answer

AAMI ES60601-1 is the US-adopted version of IEC 60601-1 and is the primary electrical safety standard for medical equipment.

Question 4

During an infusion pump PM, the technician finds the flow rate is 8% above the set rate. What action is appropriate?

Accepted Answer

Recalibrate the pump per manufacturer procedure

Answer

Most infusion pump standards require ±5% accuracy; an 8% deviation requires recalibration before return to service.

Question 5

A hospital-grade power strip fails the leakage current test. The measured chassis leakage is 800 µA. What does this indicate?

Accepted Answer

The strip exceeds the 500 µA limit and must be removed from service

Answer

NFPA 99 and AAMI standards limit chassis leakage current to 500 µA for patient-care equipment, so 800 µA is a failure.

(BTC) Biomedical Technician Certification Practice Test