Free Electrician Practice Test (20 Questions) | ExamsLib

Question 1

Bonding is required on metal gas piping in a building primarily to:

Accepted Answer

Prevent a difference in potential that could cause a spark and ignite gas

Answer

Improve the conductivity of the gas supply line

Answer

Provide an additional grounding electrode for the service

Answer

Meet plumbing code requirements only

Question 2

What is the function of the grounding electrode conductor (GEC)?

Accepted Answer

To connect the grounded system conductor or equipment to a grounding electrode

Answer

To carry load current from the panel to branch circuits

Answer

To bond two separate panels together

Answer

To provide a return path for fault current on branch circuits

Question 3

A residential dwelling has 2,000 sq ft of living space. Using 3 VA/sq ft for general lighting and applying 100% demand on the first 3,000 VA and 35% on the remainder, what is the calculated general lighting demand load?

Accepted Answer

4,050 VA

Answer

6,000 VA

Answer

2,100 VA

Answer

3,000 VA

Question 4

When sizing a service for a residence, which of the following loads is typically added at 100% of its nameplate rating with no demand factor applied?

Accepted Answer

Fixed electric space heating or air conditioning (the larger of the two)

Answer

General lighting load

Answer

Small appliance branch circuit loads

Answer

Electric clothes dryer

Question 5

A commercial occupancy has a calculated total connected load of 156,000 VA at 208Y/120 V, 3-phase. What is the approximate minimum ampacity required for each phase of the service?

Accepted Answer

433 A

Answer

500 A

Answer

300 A

Answer

750 A

Question 6

When calculating the load for a commercial kitchen with multiple pieces of electric cooking equipment, which approach is commonly permitted to reduce the calculated load?

Accepted Answer

Apply a demand factor based on the number of units, reducing the total connected load proportionally

Answer

Use only 50% of the largest piece of equipment and ignore all others

Answer

Ignore cooking equipment entirely if GFCI breakers are installed

Answer

Size the service at exactly the total connected load with no reduction

Question 7

When service-entrance conductors consist of two sets of 350 kcmil copper in parallel per phase, what total cross-sectional area is used to size the supply-side bonding jumper per NEC 250.102(C)(1)?

Accepted Answer

700 kcmil (combined area of both parallel sets)

Answer

350 kcmil (one set only)

Answer

525 kcmil (150% of one set)

Answer

1,000 kcmil (next standard size above the combined area)

Question 8

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

Accepted Answer

At the source of the separately derived system

Answer

At every downstream panelboard supplied by the transformer

Answer

At the utility meter base only

Answer

Anywhere along the feeder run between the transformer and the first panel

Question 9

GFCI protection is required for receptacles in which of the following locations?

Accepted Answer

Bathrooms, garages, outdoors, kitchens near sinks, and other wet or damp locations

Answer

Bedrooms only

Answer

Only in commercial buildings, not residences

Answer

Anywhere a 240 V circuit is present

Question 10

What is the maximum spacing between wall receptacle outlets in a dwelling unit living area, measured along the floor line?

Accepted Answer

No point along a wall space may be more than 6 feet from a receptacle outlet

Answer

Receptacles must be placed every 4 feet

Answer

A maximum of one receptacle per wall

Answer

No code requirement exists for receptacle spacing in living areas