Machine Design
According to Indian standard specifications, plain carbon steel designated by 40C8 contains carbon

0.20 to 0.40%
0.35 to 0.45%
None of these
0.40 to 0.60%

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Machine Design
A compound belt drive is used when

Shafts are arranged parallel and rotate in the same directions
Shafts are arranged at right angles and rotate in one definite direction
None of these
Shafts are arranged parallel and rotate in the opposite directions

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