Transformers MCQs

by
50 min Score: 0 Attempted: 0/50 Subscribe
1. What is the primary function of a transformer?





2. Which material is commonly used for the core of a transformer?





3. Transformers operate on the principle of:





4. The ratio of the number of turns in the primary winding to the number of turns in the secondary winding of a transformer determines its:





5. Which type of transformer core offers low hysteresis loss and eddy current loss?





6. A step-up transformer:





7. In a transformer, the primary and secondary windings are magnetically coupled through the:





8. Which of the following is not a type of transformer based on construction?





9. The efficiency of a transformer is typically highest when:





10. The frequency of the output voltage of a transformer is:





11. Transformers are rated in terms of:





12. The cooling of large transformers is generally achieved by:





13. Which of the following is an advantage of a three-phase transformer over three single-phase transformers?





14. A transformer works based on the principle of:





15. The insulation resistance of a transformer winding is tested using:





16. Transformers used in electrical power distribution typically operate at:





17. The leakage flux in a transformer is minimized by:





18. Which of the following is true for an autotransformer?





19. The term “kVA” in transformer ratings stands for:





20. Transformers are used extensively in:





21. The purpose of the oil in an oil-immersed transformer is to:





22. In a delta-star transformer connection, the primary winding is connected in:





23. A current transformer is used to:





24. A transformer with a turns ratio of 1:4 will:





25. The main cause of transformer losses is:





26. Which parameter does not affect the efficiency of a transformer?





27. A variable voltage transformer is also known as a:





28. Which of the following statements about transformers is false?





29. The cooling fins on a transformer are used to:





30. The efficiency of a transformer is defined as:





31. A transformer with 100 turns in the primary winding and 200 turns in the secondary winding will have a turns ratio of:





32. In a transformer, the losses due to magnetization and demagnetization of the core are known as:





33. The voltage regulation of a transformer refers to its ability to:





34. A transformer that can increase or decrease the voltage level is called a:





35. The efficiency of a transformer tends to decrease with:





36. The primary and secondary windings of a transformer are:





37. A transformer designed to step down 240V AC to 12V AC would have a turns ratio of:





38. A transformer that transfers electrical energy from one circuit to another without a direct electrical connection is an example of:





39. In a transformer, the maximum power transfer occurs when:





40. A transformer rated at 500 kVA with a power factor of 0.8 would have a rated apparent power of:





41. Which of the following is not a type of transformer based on cooling methods?





42. A transformer with a high turns ratio will have:





43. The efficiency of a transformer is calculated as:





44. Which part of a transformer provides a low reluctance path for the magnetic flux?





45. The purpose of laminating the core in a transformer is to:





46. Transformers used in high-frequency applications often use which type of core material?





47. Which of the following factors affect the voltage regulation of a transformer?





48. A transformer that has the same number of turns in both the primary and secondary windings is known as a:





49. The voltage across the secondary winding of a transformer is 240V when the primary voltage is 480V. What is the turns ratio?





50. The losses that occur in a transformer due to the resistance of the windings are called:





Leave a Comment

All copyrights Reserved by MCQsAnswers.com - Powered By T4Tutorials