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