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Steps are given to draw involute of given circle. Arrange the steps f C is the centre of circle and P be the end of the thread (starting point). i. Draw a line PQ, tangent to the circle and equal to the circumference of the circle. ii. Draw the involute through the points P1, P2, P3 ……..etc. iii. Divide PQ and the circle into 12 equal parts. iv. Draw tangents at points 1, 2, 3 etc. and mark on them points P1, P2, P3 etc. such that 1P1 =P1l, 2P2 = P2l, 3P3= P3l etc.

Correct Answer: i, iii, iv, ii
Involute is a curve which is formed by the thread which is yet complete a single wound around a circular object so thus the thread having length equal to the circumference of the circular object. And the involute curve follows only the thread is kept straight while wounding.

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