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Mr. Dubey • 52.49K Points
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Q. If after some use the lower part, electrodes and beathing space of a spark plug are found coated by deposits of soot and carbon, the conclusion will be

(A) Spark plug is of proper heat rating
(B) Spark advance is incorrect
(C) Spark plug is short circuited
(D) Spark plug is of too high heat rating
  • Correct Answer - Option(D)
  • Views: 82
  • Filed under category Heat Engines
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