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Which of the following is.used as a material for the ground electrode of the spark plug?(a) Nickel(b) Cast iron(c) Brass(d) BronzeI have been asked this question in an interview.Question is taken from Conventional Ignition System topic in chapter Conventional Ignition System of Automotive Engine Design

Answer»

The correct choice is (a) Nickel

For EXPLANATION: The GROUND electrode is USUALLY FORMED of nickel or sometimes an alloy of nickel and manganese. The addition of manganese is about 2.5-3.5 percent which improves the tensile strength and the resistance to the SULFUR attack at high temperatures.



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