Utilisation of Electrical Energy MCQs – DAE Electrical Engineering

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1. The main sources of electrical energy are:




2. Electric energy is measured in:




3. The heating effect of electric current is used in:




4. The power consumed in a resistive load is given by:




5. Electric welding uses the principle of:




6. The temperature of the filament in an electric lamp is about:




7. The most commonly used heating element material is:




8. The efficiency of electric heating is nearly:




9. The unit of luminous flux is:




10. The illumination is measured in:




11. The most efficient method of electric heating is:




12. The process of melting metals using electricity is called:




13. The material of filament in an incandescent lamp is:




14. The efficiency of fluorescent lamps compared to incandescent lamps is:




15. The power factor of a fluorescent lamp is usually:




16. The light output from a 40 W fluorescent lamp is approximately:




17. The main function of a choke in fluorescent lamp is to:




18. The heating element of an electric iron is placed:




19. In an electric arc furnace, heat is produced by:




20. The principle of electric traction is based on:




21. The voltage used for electric traction in Pakistan is about:




22. The main advantage of electric traction is:




23. The braking system used in electric traction is:




24. The power used for domestic lighting is:




25. The temperature rise in an electric heater depends on:




26. For same power, high voltage transmission reduces:




27. The watt-hour meter measures:




28. The process of depositing a metal coating using electricity is called:




29. Electroplating is based on the:




30. The device used for converting light energy into electrical energy is:




31. In electric furnaces, temperature can be controlled by:




32. The losses in electric heating equipment are mainly due to:




33. The power factor of resistance heating is:




34. The average efficiency of electric traction motor is:




35. In an arc furnace, electrodes are usually made of:




36. The unit of illumination is:




37. Electric discharge lamps operate on:




38. Sodium vapor lamps emit light of:




39. The arc lamps produce light due to:




40. The life of a fluorescent lamp is approximately:




41. The ratio of luminous flux to power input is called:




42. The main disadvantage of electric traction is:




43. The efficiency of sodium vapor lamp is about:




44. In arc welding, heat produced depends on:




45. The purpose of ballast in fluorescent lamp is:




46. The speed of DC series traction motor is:




47. The efficiency of electric heating depends on:




48. In electric trains, the braking energy can be:




49. In domestic wiring, heating load is considered as:




50. The main purpose of utilization of electrical energy is to convert it into:




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