Practice test

Texas Journeyman Electrician Practice Test

Free Texas journeyman electrician practice test with 20 NEC-based questions. Closed-book prep covering grounding, load calculations, and wiring methods.

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

Question 1

1

Which conductor in a standard branch circuit is used to bond metal equipment enclosures back to the panel?

Question 2

2

According to NEC Article 100 definitions, what does 'bonding' accomplish?

Question 3

3

At a separately derived system (such as a transformer secondary), where is the system bonding jumper required to be installed?

Question 4

4

When applying the NEC standard method to a dwelling unit, what volt-ampere (VA) per square foot value is used for general lighting and receptacle loads?

Question 5

5

What is the maximum number of current-carrying conductors permitted in a conduit before a conduit-fill ampacity adjustment factor must be applied per NEC 310.15(C)?

Question 6

6

A metal water pipe enters a building and is used as a grounding electrode. The pipe must be supplemented with an additional electrode when a water meter or other isolating fitting is located within what distance of the point of entry into the building?

Question 7

7

An equipment grounding conductor run with a 60-ampere branch circuit must have a minimum copper size of:

Question 8

8

Structural steel that is grounded and interconnected to form a metal building frame may serve as a grounding electrode. What minimum length of steel must be in direct contact with the earth to qualify under NEC 250.52(A)(2)?

Question 9

9

Two separate buildings on the same property are supplied from a common service. An equipment grounding conductor is run with the feeder to the second building. Which statement is correct regarding the neutral-to-ground bond at the second building's panelboard?

Question 10

10

A single-family dwelling has 2,400 sq ft of living space. Using the NEC standard method, what is the calculated general lighting and receptacle load before any demand factors are applied?

Question 11

11

A 240-volt, single-phase household electric range is rated at 12 kW. Using NEC Table 220.55 Column C (one range), what demand load is used for service calculations?

Question 12

12

When calculating the minimum number of small-appliance branch circuits for a dwelling's kitchen and dining areas, the NEC specifies at least how many 20-ampere circuits?

Question 13

13

A 208-volt, 3-phase induction motor has a nameplate full-load current (FLC) of 18 amperes. What is the minimum branch circuit conductor ampacity required by the NEC?

Question 14

14

Conduit fill rules limit the cross-sectional area conductors may occupy. For three or more conductors in a new raceway installation, what is the maximum fill percentage allowed by NEC Chapter 9?

Question 15

15

A GFCI receptacle is required by the NEC in which of the following dwelling unit locations?

Question 16

16

A building has a concrete-encased electrode (Ufer ground) consisting of 20 ft of 4 AWG bare copper encased in the concrete footings. A ground rod at the same location can only be driven to 6 ft before hitting bedrock. Under NEC 250.53(G), which of the following correctly describes the permitted installation of that ground rod?

Question 17

17

Using the NEC optional method (220.82) for a 240-volt single-phase service, the first 10 kVA of total calculated load is taken at 100% and the remainder at 40%. If a home's total connected load before demand factors is 48 kVA, what is the minimum calculated demand load in kVA?

Question 18

18

Six 12 AWG THHN current-carrying conductors are run in a single EMT conduit at an ambient temperature of 40 degrees C. Using NEC Table 310.16 (90 degrees C column base ampacity of 30 A), the 40 degrees C temperature correction factor of 0.91, and the 6-conductor adjustment factor of 0.70, what is the corrected ampacity?

Question 19

19

A 480-volt, 3-phase, 30-horsepower Design B squirrel-cage induction motor has a table FLC of 40 A per NEC Table 430.250. Using NEC Table 430.52, what is the maximum standard-size inverse time circuit breaker permitted for this motor's branch circuit short-circuit and ground-fault protection?

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