How to do basic electrical repairs - Exam
  • 1. What is the first step before starting any electrical repair?
A) Inspect the wiring.
B) Wear rubber gloves.
C) Turn off the power at the circuit breaker.
D) Gather your tools.
  • 2. What tool is essential for testing if a circuit is live?
A) Non-contact voltage tester.
B) Pliers.
C) Screwdriver.
D) Multimeter.
  • 3. What is the purpose of a wire stripper?
A) To twist wires together.
B) To remove insulation from wires.
C) To cut wires.
D) To crimp wires.
  • 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) Bathrooms and kitchens.
B) Hallways and closets.
C) Attics and basements (unfinished).
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) Green.
C) Black.
D) Red.
  • 8. What color wire is typically used for the ground wire?
A) White.
B) Black.
C) Red.
D) Green or bare copper.
  • 9. What does 'AWG' stand for in relation to wire size?
A) American Wire Grinder.
B) American Wire Gauge.
C) American Wire Guard.
D) American Wire Grade.
  • 10. If a light switch is not working, what is the first thing to check?
A) The circuit breaker.
B) The fuse box.
C) The wiring at the switch.
D) The light bulb.
  • 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) Loose wiring.
B) Low voltage.
C) Overloaded circuit.
D) Faulty outlet.
  • 13. What is the purpose of electrical tape?
A) To insulate electrical connections.
B) To identify different circuits.
C) To protect wires from physical damage.
D) To secure wires together.
  • 14. What should you do if you find frayed or damaged wiring?
A) Ignore it if it's not sparking.
B) Replace the wiring.
C) Apply a sealant.
D) Wrap it tightly with electrical tape.
  • 15. What is a pigtail connection?
A) A connector used for outdoor wiring.
B) A short wire used to connect multiple wires to a single terminal.
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) Hammer.
B) Wire strippers.
C) Needle-nose pliers.
D) Screwdriver.
  • 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 are unsightly.
B) They can overheat and cause a fire.
C) They reduce the voltage to appliances.
D) They attract pests.
  • 19. What should you do if you are unsure about how to perform an electrical repair?
A) Ask a neighbor for help.
B) Consult a qualified electrician.
C) Watch a YouTube video.
D) Try to figure it out yourself.
  • 20. What is the purpose of a conduit?
A) To distribute electricity evenly.
B) To cool down wires.
C) To protect wiring from damage.
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) Continue working after.
B) Have a medical professional check you.
C) Drink water and rest.
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) 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) A hard hat.
B) Earplugs.
C) Safety glasses.
D) Gloves (non-rubber).
  • 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 all breakers.
C) Turn off the main breaker.
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) Remove it if it is not going to be used.
C) Cap the ends, but leave it where it is.
D) Wrap it tightly in electrical tape.
  • 27. When tightening a wire connection, what is a common mistake?
A) Over-tightening, stripping the screw.
B) Under-tightening, causing it to come loose.
C) Forgetting to strip the wire.
D) Using the wrong type of screwdriver.
  • 28. What is the common voltage in US homes?
A) 240V
B) 480V
C) 120V
D) 60V
  • 29. What is electrical resistance measured in?
A) Watts
B) Ohms
C) Amps
D) Volts
  • 30. Which of the following is the BEST way to extinguish an electrical fire?
A) Use a Class C fire extinguisher.
B) Use a Class A fire extinguisher.
C) Smother it with a blanket.
D) Throw water on it.
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