How is the voltage of the used spark plug to fire when compared to a new spark plug?(a) High voltage(b) Less voltage(c) Has no effect(d) Depends on the current valueI got this question in final exam.This is a very interesting question from Types of Ignition System topic in portion Conventional Ignition System of Automotive Engine Design

How is the voltage of the used spark plug to fire when compared to a n

1.	How is the voltage of the used spark plug to fire when compared to a new spark plug?(a) High voltage(b) Less voltage(c) Has no effect(d) Depends on the current valueI got this question in final exam.This is a very interesting question from Types of Ignition System topic in portion Conventional Ignition System of Automotive Engine Design
Answer» Right option is (a) High voltage Easiest explanation: Used spark PLUGS MAY require a fairly higher voltage to fire than the new plugs because of the increase in the gap and rounding off of the center ELECTRODE. In a given engine the HIGHEST ignition voltage is required during part THROTTLE acceleration.

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