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How to do basic electrical repairs - Exam
Contributed by: Sadler
  • 1. What is the first step before starting any electrical repair?
A) Inspect the wiring.
B) Turn off the power at the circuit breaker.
C) Gather your tools.
D) Wear rubber gloves.
  • 2. What tool is essential for testing if a circuit is live?
A) Pliers.
B) Multimeter.
C) Screwdriver.
D) Non-contact voltage tester.
  • 3. What is the purpose of a wire stripper?
A) To crimp wires.
B) To twist wires together.
C) To cut wires.
D) To remove insulation from wires.
  • 4. What does GFCI stand for?
A) General Fault Current Indicator.
B) Ground Fuse Circuit Indicator.
C) Ground Fault Circuit Interrupter.
D) General Fuse Current Interrupter.
  • 5. Where are GFCI outlets typically required?
A) Attics and basements (unfinished).
B) Bathrooms and kitchens.
C) Bedrooms and living rooms.
D) Hallways and closets.
  • 6. What is the purpose of a wire connector (e.g., a wire nut)?
A) To protect wires from damage.
B) To join two or more wires together.
C) To insulate a single wire.
D) To secure wires to a device.
  • 7. What color wire is typically used for the neutral wire in a standard US electrical circuit?
A) White.
B) Red.
C) Black.
D) Green.
  • 8. What color wire is typically used for the ground wire?
A) Red.
B) White.
C) Black.
D) Green or bare copper.
  • 9. What does 'AWG' stand for in relation to wire size?
A) American Wire Guard.
B) American Wire Gauge.
C) American Wire Grade.
D) American Wire Grinder.
  • 10. If a light switch is not working, what is the first thing to check?
A) The fuse box.
B) The wiring at the switch.
C) The light bulb.
D) The circuit breaker.
  • 11. When replacing an outlet, what should you do with the wires?
A) Connect the black wire to the ground terminal.
B) Connect the white wire to the hot terminal.
C) Connect them to the new outlet exactly as they were connected to the old one.
D) It doesn't matter how you connect them, as long as they are secure.
  • 12. What is the most common cause of a tripped circuit breaker?
A) Faulty outlet.
B) Low voltage.
C) Overloaded circuit.
D) Loose wiring.
  • 13. What is the purpose of electrical tape?
A) To secure wires together.
B) To protect wires from physical damage.
C) To insulate electrical connections.
D) To identify different circuits.
  • 14. What should you do if you find frayed or damaged wiring?
A) Apply a sealant.
B) Replace the wiring.
C) Wrap it tightly with electrical tape.
D) Ignore it if it's not sparking.
  • 15. What is a pigtail connection?
A) A short wire used to connect multiple wires to a single terminal.
B) A type of wire insulation.
C) A method of grounding electrical devices.
D) A connector used for outdoor wiring.
  • 16. Which tool is best for bending wires neatly when installing in a box?
A) Screwdriver.
B) Needle-nose pliers.
C) Wire strippers.
D) Hammer.
  • 17. What is the function of the breaker panel (or electrical panel)?
A) To connect the house to the power grid.
B) To distribute electricity and protect circuits from overloads.
C) To increase the voltage of electricity.
D) To store excess electricity.
  • 18. What is the danger of using extension cords as a permanent wiring solution?
A) They attract pests.
B) They can overheat and cause a fire.
C) They reduce the voltage to appliances.
D) They are unsightly.
  • 19. What should you do if you are unsure about how to perform an electrical repair?
A) Consult a qualified electrician.
B) Ask a neighbor for help.
C) Watch a YouTube video.
D) Try to figure it out yourself.
  • 20. What is the purpose of a conduit?
A) To increase the voltage of electricity.
B) To distribute electricity evenly.
C) To cool down wires.
D) To protect wiring from damage.
  • 21. What type of screwdriver is typically used for electrical work?
A) Regular metal screwdrivers.
B) Magnetic screwdrivers.
C) Screwdrivers with wooden handles.
D) Screwdrivers with insulated handles.
  • 22. What is the safe way to handle a shock you receive from electricity?
A) Drink water and rest.
B) Continue working after.
C) Have a medical professional check you.
D) Ignore it, it's just static.
  • 23. What is 'AFCI' and what does it protect against?
A) Advanced Fuse Circuit Indicator, protects against blown fuses.
B) Arc Fault Circuit Interrupter, protects against electrical fires from arcs.
C) Automatic Fault Current Indicator, indicates faulty circuits automatically.
D) Air Flow Circuit Interrupter, protects against dust build-up.
  • 24. What safety equipment, besides insulated tools, is good to wear when working with electrical components?
A) Safety glasses.
B) A hard hat.
C) Gloves (non-rubber).
D) Earplugs.
  • 25. When working in a breaker box, what should be done, if possible, in addition to turning off the breaker you are working on?
A) Yell loudly to warn others.
B) Turn off the main breaker.
C) Work with one hand only.
D) Turn off all breakers.
  • 26. What should be done with old wiring that is disconnected but still in place?
A) Remove it if it is not going to be used.
B) Wrap it tightly in electrical tape.
C) Cap the ends, but leave it where it is.
D) Leave it in place as it is a reminder.
  • 27. When tightening a wire connection, what is a common mistake?
A) Forgetting to strip the wire.
B) Under-tightening, causing it to come loose.
C) Over-tightening, stripping the screw.
D) Using the wrong type of screwdriver.
  • 28. What is the common voltage in US homes?
A) 120V
B) 480V
C) 240V
D) 60V
  • 29. What is electrical resistance measured in?
A) Watts
B) Volts
C) Amps
D) Ohms
  • 30. Which of the following is the BEST way to extinguish an electrical fire?
A) Use a Class A fire extinguisher.
B) Throw water on it.
C) Smother it with a blanket.
D) Use a Class C fire extinguisher.
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