28/03/2020 Electrical Circuits and Dangers of Electricity(Senior Class Physics Study by Topics) 28/03/2020 0Comments by Gate Academy Welcome to your Electrical Circuits and Dangers of Electricity(Senior Class Physics Study by Topics) NAME EMAIL PHONE NUMBER 1. A drawing that uses symbols to show how the parts of an electric circuit are connected is a/an _____________________________. Parallel circuit Nichrome wire Electric diagram Circuit diagram 2. Minimum insulation resistance value recommended for LV machines as 1M Ohm/1000V 2M Ohm/1000V A&C 1000K Ohm/1000VAC 3. This is the circuit symbol for which piece of electrical equipment? A switch A battery A wire A cell 4. If you remove a light bulb from a series circuit, what happens? The other bulbs stay lit. The other bulbs go out. The electrons come out of the empty socket. 5. Receiving an electric shock from a doorknob is an example of ____________. Spontaneous electricity Static electricity Current electricity 6. More than one thermocouple connected together. The connections may be series, parallel, or both. Thermopile Outlet Approved Thermocouple 7. Which statements are correct? A risk assessment must be prepared before performing any electrical work A risk assessment does not need to be documented for simple tasks such as changing a light fitting Risk assessments are only necessary for live work 8. What is a steady flow of electricity called? A charge A terminal A current 9. What do you do if you hang your Christmas lights and you have a female plug at the end by the outlet? Buy a male/female adapter. Buy a double female adapter. Buy a double male adapter. Take down the lights and restring them. 10. What is it that flows from a battery to a light? Atoms Electrons Neutrons Protons 11. Safety-related work practices involve: All of the above Verifying power is off before doing repairs The use of ground fault circuit interrupters Keeping proper distance from overhead power lines 12. Surge arresters aboard marine are used for the protection of Transformers Motors Generators All components and switch gears 13. In order for a circuit to work, the path must be __________________. Paralled Closed Open Series 14. A material through which electric current CANNOT pass easily is a/an ____________________ Insulator Receptor Conductor Tester 15. Both of the following will burn your skin upon contact Shorted components and Soldering Irons False True 16. What does each colour represent in 4-conductor electrical wire? Red=hot, Black-ground, White=hot, Green=neutral Red=neutral, Black=hot, white=ground, green=hot Red=ground, Black=neutral, White=hot, Green=hot Red=hot, Black=hot, white=neutral, green=ground 17. If you connect a wire with 18 Ω of resistance to a batter, and measure the current to be 10 A, what is the voltage of the battery? 90 A 180 V 18 Ω 240 V 18. What is static electricity caused by? An imbalance of positive and negative charges A balance of power A balance of positive and negative charges 19. A/An _____________________ is used to turn the electricity in a current on or off Switch Insulator Battery Conductor 20. If the resistance in the circuit is 10 Ω and the current is 3 A, what is the voltage of the battery? 3.33 V 10 A 30 V 3 V 21. Which of the following describes a series circuit? Current flows along each branch Bulbs are all in a loop If one bulb breaks the other one still works 22. Which of the following gas has been used as insulating medium in electrical appliances? Sulphur hexafluoride Nitrogen Freon. Carbon dioxide 23. What is the symbol of a bulb? A rectangle A circle with an x One big and one small line 24. The minimum IR value usually recommended for MV machines as None of the above 1K Ohm/volt Machine voltage (KV+1M) Ohm Machine rating 25. Small wires can easily puncture the skin. True False 1 out of 25 Time is Up! Time's up
