Back to Back HVDC is practically used to achieve which of the below mentioned objectives: Interconnect two asynchronous AC systems Stabilization of AC systems For reducing short circuit currents All of these Correct answer: 4. All of these Back to ...
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Which of the following can be the internal cause of overvoltage in a power system: Closing unloaded line Opening loaded line Insulation failure None of these All of these Correct answer: 5. All of these
Generally, Relay protection is not provided for: Alternator field failure Overcurrent in alternators Small distribution transformers All of these Correct answer: 4. All of these
The busbar protection means protection of: Circuit breakers Isolating switches Busbar only All of these Correct answer: 4. All of these
Electric Power Generation Multiple choice questions Part 20.
The term pulverized coal is best defined as: Coal that doesn’t burns at all Coal which bums for a long time Coal that is broken down into fine particles Coal that is free from ash contents Correct answer: 3. Coal ...
The line resistance R and inductive reactance XL in transmission line are mathematically related as: XL < R XL = R XL > R None of these Correct answer: 3. XL > R
If length of arc in circuit breaker increases its resistance: Increases Decreases Remains the same None of these Correct answer: 1. Increases
Corona losses are minimized when: Smooth conductor is used Conductor size is reduced Current density in conductors in reduced None of above Correct answer: 1. Smooth conductor is used
The string efficiency of high voltage line is around: 10% 20% 40% 80% Correct answer: 4. 80%