SSC JE Mechanical Engineering 2012 Paper

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Question : 181 of 200

Marks: +1, -0

For a helical spring, spring index is

the ratio of the wire diameter to the pitch of helix.
the difference between the mean coil diameter and the wire diameter.
the ratio of mean coil diameter to wire diameter.
the ratio of the mean coil diameter to the pitch of helix.

Solution:

Spring index

={\Mean \Coil \diameter}/{\Wire \diameter}

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