Question

What is the function of the sealing between the insulator and the body shell?

(a) Prevents the hot gas from leaking

(b) Prevents the pressure increase

(c) Prevents the temperature increase

(d) Prevents Current leakage

This question was addressed to me in an interview.

Query is from Conventional Ignition System in section Conventional Ignition System of Automotive Engine Design

Answer 1

Correct option is (a) Prevents the hot gas from leaking

Easiest explanation: The body shell serves to house the electrodes and the insulator. A gas-tight seal is necessary to prevent the hot gas from leaking between the insulator and the body shell and between the insulator and the center electrode.