Tolerancing Q: Virtual Condition & MMC Explained

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The discussion focuses on understanding the concepts of virtual condition and maximum material condition (MMC) in tolerancing. The original poster seeks clarification on how to apply these concepts to a specific problem, indicating that existing resources are insufficient. A response suggests that the solution can be approached through basic arithmetic by determining the maximum and minimum values for a specified dimension. The goal is to ensure that the clearance gap remains within defined limits despite variations in the clevis dimension. Clear comprehension of these tolerancing principles is essential for accurate engineering applications.
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I read about the virtual condition http://www.symphonytech.com/articles/GDT_Design.htm
but I don't really understand the approach used to solve the problem and was wondering if someone could explain the solution. where does the MMC come into the the solution?
 

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That article is not very helpful .

Your problem can be solved with simple arithmetic .

Just see if you can work out the maximum and minimum possible values of dimension C so that the clearance gap always stays within stated limits for any variation of the clevis dimension .
 
Thread 'Correct statement about size of wire to produce larger extension'

Thread 'Correct statement about size of wire to produce larger extension'

The answer is (B) but I don't really understand why. Based on formula of Young Modulus: $$x=\frac{FL}{AE}$$ The second wire made of the same material so it means they have same Young Modulus. Larger extension means larger value of ##x## so to get larger value of ##x## we can increase ##F## and ##L## and decrease ##A## I am not sure whether there is change in ##F## for first and second wire so I will just assume ##F## does not change. It leaves (B) and (C) as possible options so why is (C)...
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