Difficulty: Easy
Correct Answer: All of the above
Explanation:
Given concepts
Reasoning
Since dedendum > addendum (standard proportions), statement (a) is true.Since D = mZ, statement (b) is true.Since cos φ < 1, base circle < pitch circle, so (c) is true.
Common pitfall
Confusing base circle with addendum circle; base circle is smaller than pitch circle for involute gears.
Final Answer
All of the above
Discussion & Comments