Question

Which of the following is not a feature of the spark plug?

(a) Varies from 0.5 to 0.85 mm

(b) Used in cold engines

(c) Dissipates the heat very quickly, it used for hot engine

(d) Ratio of turns in primary and secondary is 1:100

The question was asked at a job interview.

My question is based upon I.C Engine topic in section Internal Combustion Engine of Farm Machinery

Answer 1

The correct choice is (d) Ratio of turns in primary and secondary is 1:100

To explain I would say: The last option is a feature of the ignition coil in which 6 or 12-volt current is fed in the primary winding and from the secondary winding voltage to the tune of 2000 volt is tapped.