AP ECET ELECTRICAL AND ELECTRONICS ENGINEERING (EEE) Multiple Choice Questions (MCQs)
AP ECET Electrical and Electronics Engineering (EEE) Unit V: Power System Generation & Protection
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Which of the following is NOT a type of generating station?
- a) Thermal Power Station
- b) Hydel Power Station
- c) Nuclear Power Station
- d) Wind Power Station
Answer: d) Wind Power Station
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In a thermal power station, the primary fuel used is:
- a) Water
- b) Coal
- c) Natural gas
- d) Uranium
Answer: b) Coal
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Which of the following is the main disadvantage of a nuclear power station?
- a) High operating costs
- b) Pollution from emissions
- c) Nuclear waste disposal
- d) Low efficiency
Answer: c) Nuclear waste disposal
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The efficiency of a thermal power plant is generally around:
- a) 10-15%
- b) 20-30%
- c) 35-40%
- d) 45-50%
Answer: c) 35-40%
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What is the main function of pollution control in power plants?
- a) To reduce operational cost
- b) To minimize the environmental impact
- c) To increase power generation efficiency
- d) To control power factor
Answer: b) To minimize the environmental impact
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Which of the following is a key characteristic of the power factor correction technique?
- a) Increases the efficiency of the generating station
- b) Reduces the power factor below unity
- c) Maintains the system frequency
- d) Increases the fuel consumption
Answer: a) Increases the efficiency of the generating station
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A circuit breaker is used in power systems primarily for:
- a) Protection of circuits during overload conditions
- b) Regulation of power flow
- c) Enhancing power factor
- d) Load sharing between generators
Answer: a) Protection of circuits during overload conditions
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Which of the following is NOT a type of circuit breaker?
- a) Oil Circuit Breaker (OCB)
- b) Air Circuit Breaker (ACB)
- c) Vacuum Circuit Breaker (VCB)
- d) Induction Circuit Breaker (ICB)
Answer: d) Induction Circuit Breaker (ICB)
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The operation principle of an induction type overcurrent relay is based on:
- a) Electromagnetic induction
- b) Thermal expansion
- c) Magnetic field distortion
- d) Electric current flow rate
Answer: a) Electromagnetic induction
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Which relay is used for the protection of transmission lines?
- a) Directional relay
- b) Differential relay
- c) Distance relay
- d) Under voltage relay
Answer: c) Distance relay
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Which of the following protection is applied to alternators in a power system?
- a) Differential protection
- b) Overload protection
- c) Earth fault protection
- d) All of the above
Answer: d) All of the above
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The function of current limiting reactors in a power system is to:
- a) Limit the current during short-circuit conditions
- b) Increase the power factor
- c) Provide isolation between generators
- d) Control the system voltage
Answer: a) Limit the current during short-circuit conditions
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Which type of relay is used to protect busbars in a power system?
- a) Differential relay
- b) Distance relay
- c) Overcurrent relay
- d) Current-operated relay
Answer: a) Differential relay
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What is the primary function of lightning arrestors in a power system?
- a) To prevent voltage fluctuations
- b) To limit the magnitude of lightning-induced voltages
- c) To control load variations
- d) To protect against short circuits
Answer: b) To limit the magnitude of lightning-induced voltages
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Which of the following is a method of neutral grounding in a power system?
- a) Direct grounding
- b) Solid grounding
- c) Resistance grounding
- d) All of the above
Answer: d) All of the above
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