28/03/2020Electrical Circuits and Dangers of Electricity(Senior Class Physics Study by Topics) 0Comments by Gate Academy Welcome to your Electrical Circuits and Dangers of Electricity(Senior Class Physics Study by Topics) NAME EMAIL PHONE NUMBER 1. The of the following are classified as unsafe acts except Working too close to overhead power lines Using a GFCI Altering a 3-prong plug to fit a 2-prong outlet All of the above2. Christmas tree lights are often connected in series. This is not a good idea because They aren't colorful There isn't a complete circuit They use more energy If one light breaks they all go out3. A current needs a path to flow along, also known as a Circuit Power source Resistor4. What is an energy storage device composed of electrochemical cells? A battery A flashlight A fuse A circuit5. Switching surge is Hyperbolically dying voltage. High voltage dc Short duration transient voltage High voltage ac6. Which of the following cause injuries? Printed Circuit board etching materials All of the above Smoke from burning or metal components Battery chemicals7. The smoke detector Ion Chambers should never be disposed of by crushing or burning (incinerating) because these contain: Explosive material. Radioactive material Non-ionizing radiation source.8. This is the circuit symbol for which piece of electrical equipment? A cell A battery A wire A switch9. A single battery is called a ----? circuit cell current voltage10. Electro-mechanical breakdown of solid insulating materials occurs due to Magnetic bum Electrical stresses produced by the voltage fluctuations. Mechanical stresses produced by the electrical field Vibrations11. Which of the following describes a parallel circuit? If one bulb breaks the circuit is broken Current flows along each branch All bulbs light up together12. The circuit breaker in a typical household light circuit is rated for how many amps? 200 20 2,000 213. What is a steady flow of electricity called? A terminal A current A charge14. If the resistance in the circuit is 10 Ω and the current is 3 A, what is the voltage of the battery? 10 A 30 V 3.33 V 3 V15. Receiving an electric shock from a doorknob is an example of ____________. Spontaneous electricity Static electricity Current electricity16. Infrared Thermography inspection (IRT) cannot help in detecting..... Dynamic unbalance of a rotating machine Energised ground cables, open circuits and short circuits High electrical resistance and high loading17. Non-conductive head protection should be worn whenever there is a danger of head injury from electric shock. False True18. Electrical current can flow through concrete True False19. A point on the wiring system at which current is taken to supply utilization equipment. Outlet Grounded Service Conductors Surge Suppressor20. The conductors from the service point to the service disconnecting means. Grounded Thermopile Service Conductors Watt21. The size of an electric shock current is related to the...... Applied voltage Body resistance Both applied voltage and body resistance22. 18 gauge wire is larger than 12 gauge wire? False True23. Small wires can easily puncture the skin. False True24. What do you do if you hang your Christmas lights and you have a female plug at the end by the outlet? Buy a double male adapter. Buy a double female adapter. Take down the lights and restring them. Buy a male/female adapter.25. You have fuses instead of breakers in your house. One is blown. How do you know it's an overload, and not a short circuit? The filament is broken inside the fuse The glass is blackened out. The fuse is totally melted The glass on the fuse is broken26 out of 25Time is Up!