28/03/2020 Electrical 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. Electric cords connected to equipment may be used for raising or lowering the equipment.FalseTrue2. Which of the following is NOT a good insulator?PlasticIronGlass3. Infrared Thermography inspection (IRT) cannot help in detecting..... Energised ground cables, open circuits and short circuitsDynamic unbalance of a rotating machineHigh electrical resistance and high loading4. Pulling out Integrated Circuits incorrectly will not cause harm. TrueFalse5. Both of the following will burn your skin upon contact Shorted components and Soldering Irons FalseTrue6. A screw or a quick-connect device where a conductor(s) is intended to be connected.TerminalSurge SuppressorWatertightThermopile7. In order for a circuit to work, the path must be __________________. SeriesClosedParalledOpen8. More than one thermocouple connected together. The connections may be series, parallel, or both.OutletThermocoupleThermopileApproved9. You should use safety glasses whenever around chemicals that may splash or objects that can be thrown. FalseTrue10. Surge arresters aboard marine are used for the protection of TransformersGeneratorsAll components and switch gearsMotors11. In which circumstances are contact with electricity most likely to be harmful.Using a faulty 110V ac power tool in a damp environmentTouching a 24 V dc battery terminal with hand.Using a faulty 240Vac power tool with RCD12. A circuit must have which of the following?Energy source, wire, something to workEnergy source, battery, something to workEnergy source, wire, circuit testerEnergy source, wire, switch13. If a 100 resistor suddenly became open in series circuit, what would happen to the current? It would become maximum valueIt would stay the sameIt would decrease only slightlyIt would become zero14. 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?18 Ω240 V180 V90 A15. The size of an electric shock current is related to the...... Both applied voltage and body resistanceApplied voltageBody resistance16. The severity of a shock depends on what? The amount of current (amps)The path of the current through your bodyAll of the aboveThe duration of the shock17. Connected to earth or to some conducting body that serves in place of the earth.Receptacle OutletGroundedWatertightVoltage (of a circuit)18. The Insulation resistance value of a machine falls..... At high temperatureAt both low and high temperature bothAt low temperature19. Reaction to static electric shock may cause injury.TrueFalse20. Which type of fire extinguisher should be used to put out an electrical fire? Class AClass BClass DClass C21. An extension cord with a small cut in the outer insulation is okay to use because the internal insulation is not damaged. TrueFalse22. What is an energy storage device composed of electrochemical cells? A batteryA flashlightA circuitA fuse23. Christmas tree lights are often connected in series. This is not a good idea becauseThere isn't a complete circuitIf one light breaks they all go outThey aren't colorfulThey use more energy24. What units does the electrical current have?PowerAmpsVolts25. When you attach a battery to an electric light bulb, what process makes the bulb light up? Protons flowing from the battery into the bulbChemicals moving from the battery through the wireElectrons flowing through the circuit26 out of 25Time is Up!
