NWSA Electrical Safety and Grounding 3

Question 1

After applying lockout/tagout (LOTO), a worker must verify de-energization by:

Accepted Answer

Testing with a properly rated voltage-detecting instrument

Answer

LOTO alone is insufficient; the worker must use a calibrated voltage tester to confirm the circuit is de-energized before starting work.

Question 2

Double-insulated power tools are designed to eliminate the need for:

Accepted Answer

An equipment grounding conductor, using two independent insulating layers instead

Answer

Double-insulated tools use two separate insulation layers so a single failure cannot expose the user to a live conductor, making a ground wire unnecessary.

Question 3

Electrical burns differ from ordinary thermal burns in that they:

Accepted Answer

Can cause severe internal tissue damage along the current's path through the body

Answer

Electrical current travels through the body and can destroy deep muscle, nerve, and organ tissue in ways that may not be visible from the entry and exit wounds.

Question 4

The NEC requires communication towers to use which type of grounding electrode system?

Accepted Answer

An interconnected grounding electrode system

Answer

The NEC requires communication towers to be connected to an interconnected grounding electrode system for reliable lightning protection and fault current dissipation.

Question 5

Under OSHA regulations, a qualified electrical worker is defined as someone who:

Accepted Answer

Has received training and demonstrated ability to work safely on electrical systems

Answer

OSHA defines a qualified electrical worker by their training and demonstrated competency to identify and safely manage electrical hazards, not by a specific credential or years.

NWSA - National Wireless Safety Alliance Practice Test

NWSA - National Wireless Safety Alliance Practice Test

NWSA Electrical Safety and Grounding 3