Lightning arrester | Lightning arrester Objective Type Questions and answers


46.  Impulse ratios of insulators and lightning arresters should be


   A. Both low

   B. High and low respectively

   C. Low and high respectively

   D. Both high


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B. High and low respectively

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47.  In a thyrite lightning arrester the resistance


   A. Varies linearly with the applied voltage

   B. Increases with the applied voltage

   C. Decreases linearly with the applied voltage

   D. Is high at low current and low at high current


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D. Is high at low current and low at high current

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48.  A thyrite type lightning arrester


   A. Blocks the search voltage appearing in a line

   B. Absorbs the surgery voltage appearing in a line

   C. Offers a low resistance path to the surge appearing in a line

   D. Returns the surge back to the source


✔ View Answer


C. Offers a low resistance path to the surge appearing in a line

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49.  Which of the following is the protective device against lightning over voltages?


   A. Rod gaps

   B. Surge absorbers

   C. Horn gaps

   D. All of the above


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D. All of the above

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50.  A lightning arrester provides


   A. A low impedance path between line and ground, during operation

   B. A high impedance path between line and ground, during operation

   C. A low resistance path between line and ground, during operation

   D. A high resistance path between line and ground, during operation


✔ View Answer


A. A low impedance path between line and ground, during operation

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