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Q9. With reference to timing chains:

A. State the cause of chain elongation in service, using a sketch of a section of a camshaft roller chain to illustrate your answer;

B. State: i. The effects of increased chain length:

ii. The method of assessing percentage increase in length:

C. Explain how the effects of elongation are corrected:

D. State why a limit is placed on percentage chain elongation and give typical example.