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How to do basic electrical work safely
Contributed by: Black
  • 1. What is the first step before starting any electrical work?
A) Wear rubber gloves.
B) Gather your tools.
C) Tell someone you're working on it.
D) Turn off the power at the breaker box.
  • 2. What tool is essential for verifying power is off?
A) Non-contact voltage tester.
B) Screwdriver.
C) Multimeter.
D) Pliers.
  • 3. Which type of glove is best for electrical work?
A) Rubber insulated gloves rated for the voltage.
B) Gardening gloves.
C) Leather gloves.
D) Latex gloves.
  • 4. What should you do if you find damaged wiring?
A) Tape it up tightly.
B) Replace the entire wire or section.
C) Wrap it with aluminum foil.
D) Ignore it if it's small.
  • 5. What is the purpose of grounding?
A) To make the electricity stronger.
B) To prevent lights from flickering.
C) To provide a safe path for electricity in case of a fault.
D) To save energy.
  • 6. What color is the ground wire typically?
A) Green or bare copper.
B) Black.
C) Red.
D) White.
  • 7. What does GFCI stand for?
A) General Failure Current Indicator.
B) Ground Fault Circuit Interrupter.
C) Ground Frequency Conductivity Indicator.
D) General Fuse Current Indicator.
  • 8. Where are GFCI outlets required?
A) Garages only.
B) Bedrooms, living rooms, hallways.
C) Bathrooms, kitchens, outdoors.
D) Attics and basements only.
  • 9. What happens when a GFCI outlet detects a ground fault?
A) It starts to glow red.
B) It trips and cuts off the power.
C) It increases the voltage.
D) It makes a buzzing sound.
  • 10. Which tool is used to strip insulation from wires?
A) Wire strippers.
B) Knife.
C) Pliers.
D) Screwdriver.
  • 11. What type of screwdriver is used for most electrical work?
A) Phillips and flathead.
B) Allen wrench.
C) Robertson.
D) Torx.
  • 12. What is the purpose of a wire nut?
A) To connect two or more wires together.
B) To insulate a single wire.
C) To attach a wire to a screw terminal.
D) To measure the voltage in a wire.
  • 13. How tight should wire connections be?
A) Snug but not overtightened.
B) Very loose.
C) Just barely touching.
D) As tight as possible.
  • 14. What is the most important factor when choosing the correct wire gauge?
A) The amount of current the circuit will carry.
B) The color of the wire.
C) The length of the wire.
D) The type of insulation on the wire.
  • 15. What does the acronym 'NEC' stand for?
A) North American Electric Company.
B) New England Contractors.
C) National Energy Council.
D) National Electrical Code.
  • 16. What should you do if you are unsure about an electrical task?
A) Ask a friend who is not an electrician.
B) Ignore the problem.
C) Consult a qualified electrician.
D) Try to figure it out yourself.
  • 17. What is the purpose of electrical tape?
A) To insulate and protect electrical connections.
B) To hold wires together temporarily.
C) To mark the polarity of wires.
D) To add color to wires.
  • 18. What should you do if you get an electrical shock?
A) Lie down and rest.
B) Drink a glass of water.
C) Seek immediate medical attention.
D) Ignore it if it's mild.
  • 19. What is an arc flash?
A) A surge protector.
B) A type of light bulb.
C) A safety switch.
D) A dangerous release of energy caused by an electrical fault.
  • 20. What should you never do when working with electricity?
A) Double-check your work.
B) Use insulated tools.
C) Work in wet conditions.
D) Wear safety glasses.
  • 21. What is the function of a circuit breaker?
A) To dim lights.
B) To store electricity.
C) To protect circuits from overcurrent.
D) To increase voltage.
  • 22. What is the purpose of conduit?
A) To protect and route electrical wiring.
B) To amplify electrical signals.
C) To make wires glow.
D) To reduce electrical resistance.
  • 23. What is the best way to prevent electrical fires?
A) Regularly inspect wiring and appliances.
B) Use extension cords as permanent wiring.
C) Ignore flickering lights.
D) Overload circuits with too many devices.
  • 24. What type of fire extinguisher is suitable for electrical fires?
A) Class B extinguisher.
B) Water extinguisher.
C) Class A extinguisher.
D) Class C or ABC fire extinguisher.
  • 25. What is the 'hot' wire typically colored?
A) White.
B) Gray.
C) Green.
D) Black or red.
  • 26. What is the 'neutral' wire typically colored?
A) Green.
B) White.
C) Red.
D) Black.
  • 27. What is a pigtail?
A) A safety device.
B) A wire stripping tool.
C) A short wire used to connect multiple wires to a single terminal.
D) A type of wire insulation.
  • 28. What is the maximum number of devices that should be connected to one circuit?
A) Depends on the circuit's amperage and the devices' wattage.
B) Always five.
C) Unlimited.
D) Ten.
  • 29. Which of the following is NOT a sign of a potential electrical problem?
A) Consistent power supply.
B) Warm outlets or switches.
C) Burning smell.
D) Flickering lights.
  • 30. What is important to remember when replacing an outlet?
A) Match the amperage rating and wiring configuration.
B) Any outlet will do.
C) The color of the outlet.
D) The brand of the outlet.
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