CABT Healthcare and Electrical Safety Questions and Answers

Question 1

A nurse reports feeling a slight tingling sensation when simultaneously touching a patient's metal bed frame and the chassis of a portable ECG machine.
This situation most likely indicates which electrical safety issue?

Accepted Answer

Excessive chassis leakage current.

Answer

A faulty power switch on the ECG machine.

Answer

Normal static electricity discharge.

Answer

An overloaded power circuit.

Question 2

According to the NFPA 99 standard, what is the maximum allowable ground wire resistance for a piece of cord-connected medical equipment used in a patient care setting?

Accepted Answer

0.5 Ohms

Answer

5.0 Ohms

Answer

0.1 Ohms

Answer

1.0 Ohm

Question 3

Which of the following is the most significant danger associated with microshock?

Accepted Answer

Induction of ventricular fibrillation from a very low current.

Answer

Severe skin burns at the point of contact.

Answer

Involuntary muscle contraction causing patient injury.

Answer

Overheating of internal electronic components.

Question 4

A biomedical technician is replacing a wall outlet in a patient's room designated as a "wet procedure location." Which type of receptacle is required to be installed to enhance safety?

Accepted Answer

A hospital-grade receptacle.

Answer

A standard residential-grade duplex receptacle.

Answer

An industrial-grade, twist-lock receptacle.

Answer

A surge-protecting receptacle.

Question 5

What is the primary safety function of an isolation transformer in the power supply of medical equipment used in an operating room?

Accepted Answer

To create an ungrounded secondary circuit, reducing macroshock risk.

Answer

To increase the line voltage for high-power devices.

Answer

To convert the incoming AC power to DC power.

Answer

To act as the primary circuit breaker for the device.

Question 6

During an electrical safety inspection, a technician tests a portable patient monitor. Under NFPA 99 guidelines for equipment used in the patient care vicinity, the chassis leakage current must NOT exceed:

Accepted Answer

300 microamperes

Answer

10 milliamperes

Answer

500 microamperes

Answer

100 microamperes

A nurse reports feeling a slight tingling sensation when simultaneously touching a patient's metal bed frame and the chassis of a portable ECG machine.This situation most likely indicates which electrical safety issue?

A nurse reports feeling a slight tingling sensation when simultaneously touching a patient's metal bed frame and the chassis of a portable ECG machine.
This situation most likely indicates which electrical safety issue?