Design Engineer Question:

In a gear, having involute teeth, the normal to the involute is a tangent to the

A. pitch circle
B. base circle
C. addendum circle
D. dedendum circle

Option B

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Screws jacks have multiple threads. A. Agree B. Disagree	The square threads are not so strong as V-threads but they offer less frictional resistance to motion than Whitworth threads. A. Correct B. Incorrect