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Electrical Engineering Materials - Interview Questions and Answers

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81. Surface resistance of an insulating material is reduced due to the
A. smoky and dirty atmosphere
B. humidity in the atmosphere
C. both (a) and (b)
D. neither (a) nor (b)
Explanation:
82. Spark plug makes use of which of the following materials for insulation ?
A. Porcelain
B. Slate
C. Asbestos
D. Glass
Explanation:
83. Commonly used conducting materials are
A. copper
B. aluminium
C. both (a) and (b)
D. copper and silver
Explanation:
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