Lightning Arrester Objective Questions|Surge Absorber MCQ Questions

In this Post, Lightning Arrester Objective Questions and answers are give. you can find MCQs on surge absorbers also.

Also Read: Lightning Arrester|ESE Lightning Arrester & Conventional Iightning Arrester

Contents

Lightning Arrester Objective Questions

(i) The most severe surges on the line are produced by ……………

Ans: lightning

(ii) Lightning produces a …………… fronted wave.

Ans: steep
(iii) Transients on the power system due to current chopping are taken care of by ……………

Ans: resistance switching

(iv) Arcing ground can be prevented by ……………

Ans: earthing the neutral

(v) The lightning currents range from 10 kA to about …………… kA.

Ans: 90

(vi) For successful working of ground wire, the footing resistance of tower should be ……………

Ans: low

vii) A surge diverter should be located …………… to the apparatus to be protected.

Ans: close

(viii) A 1/50 μs surge is …………… harmful than 3/50 μs surge. Assume the same peak value.
(more, less)

Ans: more

(ix) The …………… lightning strokes are very rare on the power system. (direct, indirect)

Ans: direct

(x) Most of the lightning strokes are due to …………… charged clouds. (negatively, positively)

Ans: negatively

(xi) The stroke A will always occur on …………… (tallest object, earth)

Ans: tallest object

(xii) …………… cannot protect the equipment from the travelling waves reaching the equipment. (ground wires, lightning arrester)

Ans: ground wires

(xiii) In sub-stations, the most commonly used type of arrester is …………… arrester.
(Thyrite, horn gap, rod gap)

Ans: thyrite

(xiv) Surge absorbers are used to …………… the steepness of wave front of the surge. (reduce, increase)

Ans: reduce

Surge Absorber MCQ Questions

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

Ans: Low-voltage high frequency oscillations

Surge absorber……….. the energy of travelling waves

A. Absorbs

B. Reflects

C. Diverts

D. Partly absorbs and partly diverts

Ans: D. Partly absorbs and partly diverts

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

Ans: A. Reducing the steepness of wavefront

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

Ans: C. EHV and UHV system

The over voltage surge in power systems may be caused by

A. Lightning

B. Resonance

C. Switching