Mechanical Engineering - Machine Design - Discussion

Discussion Forum : Machine Design - Section 1 (Q.No. 42)
42.
Which of the following statement is correct for gears?
The addendum is less than dedendum
The pitch circle diameter is equal to the product of module and number of teeth
The pitch circle is always greater than the base circle
all of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
22 comments Page 2 of 3.

Ani said:   8 years ago
Dedendum = 1.157*addendum.
Addendum = radial distance from pitch circle to top of tooth.
Dedendum = radial distance from pitch circle to base of the tooth.

Sahid parvez said:   8 years ago
Addendum- it is the radial height of a tooth above the pitch circle.its standard value is one module.

Dedendum- it is the radial depth of a tooth below the pitch circle. It's standard value is 1.157m.

Rishi said:   8 years ago
Well Said @Sahid Parvez.

(It's correct Tooth Proportions).

Mangesh said:   7 years ago
The correct Answer is C.
(1)

Saif ul islam said:   7 years ago
Addendum is 1m.

Dedendum is addendum+clearance =1m + 0.157m=1.157m.
i.e 0.157 larger than addendum.

Akhilesh Tiwari said:   7 years ago
Dedendum greater then addendum is the Right answer.

Dedendum= addendum + clearance so dedendum always greater then addendum.
(2)

Sid said:   6 years ago
Can anyone explain about option B?

VNS700 said:   6 years ago
The formula of module is diameter/no of teeth.

Hence option B.

Aditya raj said:   6 years ago
Given the answer is right guys.

Muhammad Saad said:   5 years ago
@All.

It is written pitch circle diameter =module * a number of teeth.

As we know that;
Module=pitch circle dia/no.of teeth.
So, option B is also correct.


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