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Pressure angle of involute gears does not exceed 25°, since
1. this will lead to unwanted radial force
2. the number of teeth to avoid undercutting will be very high
3. no cutters are available
4. gears will become too small

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Correct Answer - Option 1 : this will lead to unwanted radial force

Pressure angle of involute gears does not exceed 25° because it lead to unwanted radial force as the gear profile are curved.

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