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Q:

For how many times the contact breaker must make and break the circuit for a four-cylinder engine operating at N rpm?

A) N times B) 1.5N times
C) N/2 times D) 2N times
 
Answer & Explanation Answer: D) 2N times

Explanation: The cam is having the same number of lobes as there are engine cylinders. They are used with two contact breakers in parallel.

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