Switchgear and Protection MCQs Part 11 Which of the below mentioned fault imposes severest duty on circuit breaker Which of the below mentioned fault imposes severest duty on circuit breaker: Line to Ground fault Line to Line fault Line to Line to Line fault Three phase fault Correct answer: 4. Three phase fault Certain power … Read more
Switchgear and Protection MCQs Part 10 An arc is produced when switch having high voltage and large current circuit is An arc is produced when switch having high voltage and large current circuit is Closed Opened Either of above None of above Correct answer: 2. Opened A circuit breaker is rated as 1500 A, 1000 … Read more
Power System Protection MCQs Part 18 The arc voltage in circuit breaker The arc voltage in circuit breaker: Lags arc current by 90° Leads arc current by 90° Lags arc current by 180° Is in phase with arc current Correct answer: 4. Is in phase with arc current A fuse wire of cross-section has a … Read more
Power System Protection MCQs Part 17 A circuit breaker is rated as 1800 A, 1200 MVA, 33 kV, 3 second, 3 phase oil circuit breaker. The rated making current is A circuit breaker is rated as 1800 A, 1200 MVA, 33 kV, 3 second, 3 phase oil circuit breaker. The rated making current is: 35232.20 … Read more
Power Generation MCQs Part 27 Which of following power plants has minimum operating cost Which of following power plants has minimum operating cost: Hydroelectric power plant Gas power plant Steam power plant Nuclear power plant Correct answer: 1. Hydroelectric power plant Which of following is the main advantage of hydro-plant Which of following is the … Read more
Power Generation MCQs Part 26 The basic unit of energy is The basic unit of energy is joule watt joule/s watt/s Correct answer: 1. Joule The knowledge of diversity factor helps in determining The knowledge of diversity factor helps in determining: Average load Plant capacity Units generate None of these Correct answer: 2. Plant capacity … Read more
Power Generation MCQs Part 25 Which of following material is used as moderator in nuclear power station Which of following material is used as moderator in nuclear power station: Boron Calcium Graphite Plutonium Correct answer: 3. Graphite The primary source of energy is The primary source of energy is: Water Sun Coal Air Correct answer: … Read more
Power Generation MCQs Part 24 Thermal efficiency of steam power plant is around Thermal efficiency of steam power plant is around: 13.5% 28% 33.9% 52% Correct answer: 2. 28% The overall efficient of steam power plant is ___________ its thermal efficiency The overall efficiency of steam power plant is ___________ its thermal efficiency: Same as … Read more
Basic Electrical Engineering MCQs Part 23 Certain amplifier develops 100 W of output power Certain amplifier develops 100 W of output power. A DC power supply furnishes the amplifier 5 at 50 V. The power supply draws 3 A form 130 V source. The efficiency of power supply is: 0.32 0.64 0.78 0.94 Correct answer: … Read more
Basic Electrical Engineering MCQs Part 22 Two electric bulbs have tungsten filament of same length. If one of them gives 50 W and other one 100 W, then which of following is correct Two electric bulbs have tungsten filament of same length. If one of them gives 50 W and other one 100 W, then … Read more