Short Circuit Analysis — MCQs – EE

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1. The main purpose of short circuit analysis in power systems is to:



2. A short circuit in a power system results in:



3. The most severe type of fault in a power system is:



4. A symmetrical fault means:



5. An unsymmetrical fault is a type of:



6. The most common type of fault in power systems is:



7. A short circuit mainly occurs due to:



8. During a short circuit, the voltage at the fault point:



9. Short circuit current magnitude depends mainly on:



10. Short circuit studies are essential for:



11. The fault current is maximum when the fault occurs:



12. The per-unit system is preferred in fault analysis because:



13. The symmetrical component method is used for:



14. Positive sequence components represent:



15. Negative sequence components represent:



16. Zero sequence components exist only when:



17. In a single line-to-ground fault, the sequence networks are connected:



18. For a line-to-line fault, which sequence networks are used?



19. The initial high current immediately after a fault occurs is called:



20. The component of fault current that decays with time is the:



21. Subtransient reactance of a generator is used to estimate:



22. The transient period after a short circuit lasts for:



23. The circuit breaker must be capable of:



24. The current that a circuit breaker interrupts after the fault is known as:



25. The breaking capacity of a circuit breaker is usually expressed in:



26. The system’s fault level at a bus helps determine:



27. The transient reactance of a synchronous machine is:



28. During a fault, protective relays operate to:



29. The main objective of short circuit studies is to:



30. Short circuit analysis is essential during:



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