Power Systems MCQs

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1. In power systems, the term ‘bus’ refers to:





2. The power factor of an AC circuit is defined as the:





3. Which component is used to increase the voltage level of AC power for transmission?





4. The purpose of a circuit breaker in a power system is to:





5. A synchronous generator is also known as:





6. Which parameter characterizes the ability of a transmission line to transfer electrical power?





7. The phenomenon of ‘skin effect’ in power transmission lines primarily affects the flow of:





8. A transmission line typically consists of conductors separated by:





9. What is the standard frequency of electrical power transmission in most countries?





10. Which type of power plant uses the nuclear fission process to generate electricity?





11. The main disadvantage of underground transmission lines compared to overhead lines is:





12. The purpose of a step-up transformer at a generating station is to:





13. In a three-phase power system, the phase angle difference between any two phases is:





14. The unit of electrical power is:





15. The term ‘load shedding’ in power systems refers to:





16. What does the term ‘reactive power’ refer to in an AC circuit?





17. The function of a surge arrester in a power system is to protect against:





18. The term ‘black start’ capability of a power plant refers to its ability to:





19. Which type of power plant relies on the temperature difference between hot and cold water to generate electricity?





20. The standard formula for calculating electrical power is:





21. The voltage regulation of a transformer is defined as the ratio of:





22. A transmission line with a higher capacitance will have:





23. The principle of operation of a solar photovoltaic (PV) cell is based on the:





24. Which type of power plant has the lowest greenhouse gas emissions per unit of electricity generated?





25. The term ‘load factor’ in power systems refers to the:





26. The main advantage of AC (Alternating Current) over DC (Direct Current) for long-distance transmission is:





27. A transmission line is considered ‘long’ if its length is more than:





28. The ‘per-unit’ system in power systems is used to:





29. Which renewable energy source is weather-dependent and intermittent in nature?





30. The term ‘relay’ in a power system refers to a device used for:





31. The term ‘islanding’ in power systems refers to:





32. The power flow in a transmission line is affected by:





33. Which of the following is a renewable source of energy?





34. What is the standard voltage level for transmission in high-voltage power lines?





35. The ‘power triangle’ in AC circuits relates:





36. A ‘brownout’ refers to:





37. The phenomenon of ‘voltage sag’ in a power system is typically caused by:





38. Which renewable energy source utilizes the kinetic energy of wind to generate electricity?





39. A ‘feeder’ in a power distribution system refers to:





40. The purpose of a capacitor bank in a power system is to:





41. The efficiency of a power plant is defined as:





42. Which renewable energy source converts organic waste into electricity or heat?





43. The ‘right-hand rule’ is used to determine the direction of:





44. The term ‘generation reserve’ in power systems refers to:





45. Which type of fault in a power system occurs when there is a direct connection between two phases or between a phase and ground?





46. The term ‘reactive compensation’ in power systems refers to:





47. The main advantage of a gas turbine power plant is:





48. A ‘microgrid’ is:





49. Which component of a power system typically requires the highest maintenance?





50. The ‘electric grid’ refers to:





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