CBET Electronics and Electrical Safety 2

Question 1

What is the maximum allowable leakage current for a Type CF (cardiac floating) applied part according to IEC 60601-1?

Accepted Answer

10 microamps

Answer

500 microamps

Answer

100 microamps

Answer

50 microamps

Question 2

In a hospital electrical system, what is the purpose of an isolation transformer in an isolated power system?

Accepted Answer

To prevent ground-fault current from flowing through patients

Answer

To step down voltage for equipment

Answer

To increase available current capacity

Answer

To convert AC to DC power

Question 3

What component in an electrical circuit allows current to flow in only one direction?

Accepted Answer

Diode

Answer

Resistor

Answer

Capacitor

Answer

Inductor

Question 4

When measuring the resistance of a component with a multimeter, why must the circuit power be turned off first?

Accepted Answer

Because the multimeter supplies its own test current and external voltage will cause inaccurate readings

Answer

To protect the component from damage

Answer

To prevent electrical shock to the technician

Answer

To avoid damaging the circuit board traces

Question 5

What is the purpose of a ground wire (green or green/yellow) in a medical device power cord?

Accepted Answer

To provide a low-impedance fault current path to trip the circuit breaker

Answer

To carry the return current during normal operation

Answer

To filter electromagnetic interference

Answer

To supply backup power during outages

Question 6

Which of the following best describes the function of an optocoupler (optoisolator) in medical equipment?

Accepted Answer

Transmitting signals between circuits while maintaining electrical isolation

Answer

Amplifying weak biological signals

Answer

Converting optical signals to radio frequency

Answer

Measuring light intensity for phototherapy