Surge Absorber Objective Type Questions and answers
21. Surge absorbers are used for protection against
A. High-voltage low-frequency oscillations
B. High-voltage high-frequency oscillations
C. Low-voltage high frequency oscillations
D. Low-voltage low-frequency oscillations
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C. Low-voltage high frequency oscillations
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22. Surge absorber........... the energy of travelling waves
A. Absorbs
B. Reflects
C. Diverts
D. Partly absorbs and partly diverts
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23. Surge modifiers are employed for
A. Reducing the steepness of wave front
B. Reducing the current of wavefront
C. Reducing the voltage of wavefront
D. Modify the shape of the wave front
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24. Switching over voltages are more hazards than lightning surges in case of
A. Low-voltage system
B. 33KV system
C. EHV and UHV system
D. All of the above
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25. The over voltage surge in power systems may be caused by
A. Lightning
B. Resonance
C. Switching
D. All of the above
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