Mechanical Engineering - Theory of machines - Discussion

Discussion Forum : Theory of machines - Section 5 (Q.No. 21)
21.
Which of the following statement is correct for gears ?
The addendum is less than the dedendum
The pitch circle diameter is the product of module and number of teeth
The contact ratio means the number of pairs of teeth in contact
all of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
2 comments Page 1 of 1.

Utk said:   6 years ago
Wrong answer addendum is always greater than dedendum.

Rathi said:   6 years ago
@Utk. The addendum is less than the dedendum - It is correct.

Why dedendum Value is more than addendum value?

In order to get clearance between the teeth of one gear and the bottom surface of mating gear so as to avoid interference, the dedendum is having more value than an addendum.

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