Preview Questions Electrician | Role Specific Skill

Question 1: How would you troubleshoot an electrical panel where the main breaker keeps tripping?

Which action should you take?

Choose only one option

Add additional circuits to balance the load

Leave the breaker switched off to prevent further issues

Increase the size of the breaker

Check for short circuits or overloaded circuits in the system

Question 2: In three-phase circuits, what is the best method to check for phase imbalance when troubleshooting the system?

Which action should you take?

Choose only one option

Measure the voltage between each pair of phases

Check for physical damage to the wires

Test the individual loads on each phase

Measure the total current on each phase

Question 3: What is the required method of bonding for metal conduit in electrical installations according to the NEC?

Which action should you take?

Choose only one option

Bonding the conduit with a screw to the wall

Bonding the conduit directly to the panel

Bonding the conduit to the ground system using a separate ground wire

Bonding the conduit with a metal strap to the electrical box

Question 4: What is the proper way to install a junction box for a new circuit?

Which action should you take?

Choose only one option

By simply attaching the box to the wall and placing wires inside

By selecting the right size box, ensuring all connections are properly secured, and leaving room for future connections

By using the smallest box possible to minimize space usage

By leaving the wires exposed without securing them in the box

Question 5: In a commercial circuit design, how do you prevent electrical interference when running power and data cables together?

Which action should you take?

Choose only one option

By running power cables and data cables in the same conduit

By using data cables with larger insulation to avoid interference

By running data cables first, then power cables over them

By separating power and data cables with proper shielding and grounding to prevent electromagnetic interference

Question 6: When installing outlets in a bathroom, what does the NEC require?

Which action should you take?

Choose only one option

All outlets must be 15-amp

No specific requirements exist for bathrooms

Only the outlet nearest to the sink needs to be GFCI protected

All outlets must be GFCI protected