CEI Electrical System Components 3

Question 1

Which insulation type is rated for use in wet locations and has a 90°C temperature rating?

Accepted Answer

Type THWN-2

Answer

Type THWN-2 is rated for wet locations with a 90°C temperature rating, making it suitable for conduit in damp or wet environments.

Question 2

A transformer's kVA rating represents which of the following?

Accepted Answer

Its apparent power capacity

Answer

kVA (kilovolt-amperes) represents the apparent power rating of a transformer, which is the product of voltage and current without regard to power factor.

Question 3

What component is used to connect a grounding electrode system to the service equipment?

Accepted Answer

Grounding electrode conductor (GEC)

Answer

The grounding electrode conductor (GEC) connects the grounding electrode system (such as a ground rod) to the service equipment.

Question 4

Which type of switch is used to control a single light fixture from two different locations?

Accepted Answer

Three-way switch

Answer

Three-way switches are used in pairs to control a single load from two separate locations, such as both ends of a staircase.

Question 5

What is the minimum cover requirement for direct-buried Schedule 80 PVC conduit under a residential driveway?

Accepted Answer

12 inches

Answer

NEC Table 300.5 requires a minimum 12-inch cover for Schedule 80 PVC conduit under a residential driveway.

(CEI) Certified Electrical Inspector Practice Test

(CEI) Certified Electrical Inspector Practice Test

CEI Electrical System Components 3