EEI Tech Tools and Equipment Flashcards

What is a wire nut (twist-on connector) primarily used for?

Answer: Joining two or more stripped electrical conductors together

A wire nut's internally threaded plastic cap twists onto stripped wire ends, creating an insulated, secure connection between two or more conductors.

A socket wrench extension bar is most useful for:

Answer: Reaching and turning fasteners in deep or obstructed locations

An extension bar increases the distance between the ratchet handle and the socket, allowing the technician to reach fasteners recessed deep in equipment.

What physical principle does a non-contact voltage tester use to detect live AC wires?

Answer: Capacitive coupling to the AC electric field

Non-contact testers sense the alternating electric field surrounding a live AC conductor through capacitive coupling, triggering a visual or audible alert.

Which screwdriver type is required for a Phillips head screw?

Answer: Phillips (cross-point)

A Phillips screw has a cross-shaped recess designed to engage the matching cross-point tip of a Phillips screwdriver for driving and removal.

In electrical wiring, what does the AWG designation indicate?

Answer: American Wire Gauge

AWG (American Wire Gauge) is the U.S. standard for expressing wire conductor diameter; a lower AWG number means a larger diameter and higher current capacity.

A ground fault circuit interrupter (GFCI) outlet is designed to:

Answer: Trip rapidly when it detects a small current leak to ground

A GFCI monitors the difference between hot and neutral currents and trips within milliseconds when it detects as little as 5 mA leaking to ground, protecting against electrocution.

Needle-nose pliers are especially useful for:

Answer: Gripping and bending wire in tight or confined spaces

The long, tapered jaws of needle-nose pliers allow technicians to reach into confined areas and precisely manipulate small wires, pins, or components.