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