IOCL Junior Operator Electrical MCQ || IOCL Junior Operator General Science Questions and Answers11. What factors determine the amount of heat generated in a conductor?1 . Voltage and length 2 . Current and resistance 3 . Material and shape 4 . Temperature and pressure Answer and SolutionAnswer: "Current and resistance " Current and resistance determine the amount of heat generated in a conductor. The heat generated is proportional to the square of the current and the resistance of the conductor (H = I²R). Discuss12. Why is it important to have an appropriate cross-sectional area for a conductor?1 . To increase voltage drop 2 . To increase insulation 3 . To maximize cost 4 . To minimize resistance and heat generation Answer and SolutionAnswer: "To minimize resistance and heat generation "A larger cross-sectional area reduces resistance, leading to less heat generation and voltage drop. Discuss13. What is the purpose of insulation on a conductor?1 . To increase resistance 2 . To prevent current flow 3 . To protect against hazards and withstand environmental conditions 4 . To generate heat Answer and SolutionAnswer: "To protect against hazards and withstand environmental conditions "Insulation protects against electrical shock, fire, and other hazards, and must be suited to the environment. Discuss14. What is a bare conductor?1 . A conductor without any covering 2 . A conductor used only in households 3 . A conductor made of rubber 4 . A conductor with thick insulation Answer and SolutionAnswer: "A conductor without any covering "Bare conductors are used where insulation is not necessary, such as in overhead transmission lines and earthing. Discuss15. What is the key difference between a solid and a stranded conductor?1 . Number of individual wires in the core 2 . Material type 3 . Insulation thickness 4 . Color of the conductor Answer and SolutionAnswer: "Number of individual wires in the core "A solid conductor has one core wire, while a stranded conductor has multiple smaller wires twisted together. Discuss16. In a stranded conductor, the number of individual wires can range from:1 . 1 to 50 2 . 3 to 162 3 . 100 to 500 4 . 2 to 10 Answer and SolutionAnswer: "3 to 162 "The number of wires in a stranded conductor ranges from 3 to 162. Discuss17. What is the primary purpose of using stranded conductors?1 . To increase insulation resistance 2 . To decrease cost 3 . To reduce dielectric strength 4 . To improve flexibility and current-carrying capacity Answer and SolutionAnswer: "To improve flexibility and current-carrying capacity "Stranded conductors are more flexible and can carry higher currents due to the increased surface area. Discuss18. What does dielectric strength measure?1 . Resistance to current flow 2 . Temperature resistance 3 . Ability to withstand voltage without breakdown 4 . Mechanical strength of insula Answer and SolutionAnswer: "Ability to withstand voltage without breakdown "Dielectric strength indicates how much voltage an insulation layer can handle before it fails. Discuss19. What is the breakdown voltage of insulation?1 . The voltage at which insulation fails 2 . The voltage used to measure insulation resistance 3 . The average voltage insulation can handle 4 . The minimum voltage insulation can handle Answer and SolutionAnswer: "The voltage at which insulation fails "Breakdown voltage is the potential difference that causes the insulation to break down. Discuss20. Which tape is used for insulating joints under tension, allowing layers to bond together?1 . Friction tape 2 . Plastic tape 3 . Varnished cambric tape 4 . Rubber tape Answer and SolutionAnswer: "Rubber tape "Rubber tape is designed to bond under pressure, restoring insulation at joints. Discuss1234567
