Practice test

Ohio Journeyman Electrician Practice Test

Free Ohio journeyman electrician practice test with 20 NEC-based questions. Covers grounding, load calculations, and wiring methods. Instant scoring.

These questions are for study practice only and are not official exam questions.

Question 1

1

What is the main purpose of the main bonding jumper at a service panel?

Question 2

2

In a dwelling with a single service, where should the neutral-to-ground bond be made?

Question 3

3

Under the NEC, a grounding electrode conductor whose sole connection is to a single driven ground rod need not be larger than what size copper conductor?

Question 4

4

Two ground rods are installed at a residence and are not bonded to a supplemental electrode with a documented resistance of 25 ohms or less. What does the NEC require?

Question 5

5

What is the primary purpose of bonding metal water piping systems in a building?

Question 6

6

Why must the equipment grounding conductor never be sized based on the ungrounded conductor's actual carried load current?

Question 7

7

A feeder supplies a detached garage with no other metallic paths between the buildings. What conductors are required in the feeder, and how must grounding be handled at the garage?

Question 8

8

Ground rings are used as a supplemental grounding electrode around a building. What is the minimum length and conductor size the NEC specifies for a ground ring electrode?

Question 9

9

Which conductor is never permitted to be used as an equipment grounding conductor in a modern branch circuit?

Question 10

10

What color insulation, when used, identifies an equipment grounding conductor smaller than 6 AWG?

Question 11

11

A metal underground water pipe is used as a grounding electrode. What additional requirement applies to this electrode under the NEC?

Question 12

12

In a system with multiple grounding electrodes present at a building, what does the NEC require regarding their treatment?

Question 13

13

For a standard dwelling unit, what is the base general lighting load calculation, in volt-amperes per square foot, used under NEC Article 220?

Question 14

14

In a dwelling unit load calculation, how many small-appliance branch circuits does the NEC require at minimum for the kitchen and dining areas?

Question 15

15

What volt-ampere value must be assigned to each dwelling-unit small-appliance and laundry branch circuit when performing a standard load calculation?

Question 16

16

When sizing a feeder for a dwelling unit range rated 12 kW, what NEC table is used to apply a demand factor rather than counting the full nameplate rating?

Question 17

17

Under the standard method in NEC Article 220, after totaling general lighting, small-appliance, and laundry loads for a dwelling, what happens to the first 3000 volt-amperes and the remainder?

Question 18

18

A continuous load is defined by the NEC as one expected to run at maximum current for how long?

Question 19

19

A dwelling has 2500 square feet, two small-appliance circuits, one laundry circuit, a 10 kW range, and a 5 kW dryer, with no electric heat or air conditioning to compare. Which calculation approach applies demand factors to appliance loads collectively?

Question 20

20

When calculating feeder or service loads with an electric range and a separate wall oven and cooktop in the same dwelling, how are the wall oven and cooktop treated under NEC Table 220.55?

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