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