CEA Tools, Equipment & Testing Procedures 3

Question 1

What does a low resistance reading (near zero ohms) between the hot and neutral terminals of a receptacle most likely indicate?

Accepted Answer

A short circuit or wiring fault

Answer

Near-zero resistance between hot and neutral (with power off) indicates a short circuit that must be located and corrected.

Question 2

A lineman's pliers (side-cutting pliers) are primarily designed for:

Accepted Answer

Gripping, twisting, and cutting larger conductors

Answer

Lineman's pliers combine strong jaws for gripping and twisting wire with a cutting edge for heavier conductors.

Question 3

When performing a ground resistance test with a three-point fall-of-potential method, the potential probe should be placed at approximately what distance between the ground electrode and the current probe?

Accepted Answer

62% of the spacing

Answer

The 62% rule positions the potential probe in the flat portion of the resistance curve, giving an accurate ground resistance reading.

Question 4

An insulation resistance tester (megohmmeter) reads 'OL' or infinity when testing a motor winding. This indicates:

Accepted Answer

Good insulation with no leakage path detected

Answer

An infinity or OL reading on a megohmmeter indicates very high insulation resistance, meaning the insulation is in good condition.

Question 5

Which screwdriver tip type is required for the tamper-resistant screws commonly found on electrical panel covers?

Accepted Answer

Torx or hex (security bit)

Answer

Tamper-resistant screws use Torx, hex, or other security bit profiles to discourage unauthorized access to electrical panels.

(CEA) Certified Electrical Apprentice Practice Test

(CEA) Certified Electrical Apprentice Practice Test

CEA Tools, Equipment & Testing Procedures 3