Question

What is the general crankshaft degree range of advancement in a centrifugal advance system?

(a) 10-15

(b) 20-25

(c) 26-32

(d) 34-38

This question was addressed to me in a national level competition.

This intriguing question comes from Ignition Advance topic in chapter Conventional Ignition System of Automotive Engine Design

Answer 1

The correct option is (d) 34-38

The explanation: In general the crankshaft degree of advancement in a centrifugal advance type varies between 34 and 38 crankshaft degrees, including the initial timing,which is usually about 8-degree bottom dead center.