GD&T Tolerance Stack-up Analysis 2

Question 1

What advantage does GD&T cylindrical position tolerance offer over square coordinate tolerancing in a stack-up budget?

Accepted Answer

The cylindrical tolerance zone provides approximately 57% more tolerance area than a square zone of the same width

Answer

It eliminates the need for tolerance stack-up analysis

Answer

It reduces the number of dimensions required on the drawing

Answer

It is always easier to measure on the shop floor

Question 2

In a tolerance stack-up, what is the 'requirement' being evaluated?

Accepted Answer

The minimum clearance or maximum interference condition that must be met for proper function

Answer

The manufacturing cost target for each component

Answer

The surface finish specification on mating parts

Answer

The material yield strength requirement

Question 3

Which analysis method accepts a small percentage of non-conforming assemblies in exchange for allowing larger individual part tolerances?

Accepted Answer

Statistical (RSS) analysis

Answer

Worst-case arithmetic analysis

Answer

Arithmetic analysis

Answer

Virtual condition analysis

Question 4

What generally happens to each individual component tolerance as the number of components in a stack-up increases while the assembly requirement stays fixed?

Accepted Answer

Each component must be made to tighter tolerances to maintain the same assembly requirement

Answer

The required component tolerance decreases proportionally

Answer

The required component tolerance remains constant

Answer

The assembly requirement automatically becomes easier to meet

Question 5

In tolerance stack-up analysis, what is a 'contributing dimension'?

Accepted Answer

Any dimension whose variation affects the critical assembly condition being analyzed

Answer

A dimension that increases manufacturing cost

Answer

A dimension shown with a bilateral plus/minus tolerance only

Answer

A dimension specified with a position GD&T symbol

Question 6

What is 'assembly shift' (datum shift) in the context of tolerance stack-up analysis?

Accepted Answer

Additional variation allowed when a datum feature departs from its maximum material condition

Answer

A change in the assembly sequence on the shop floor

Answer

Physical movement of the assembly during shipping

Answer

A correction factor applied to stack-up calculations

Question 7

Which of the following best describes 'allocating tolerances' in a tolerance stack-up study?

Accepted Answer

Distributing the total assembly tolerance budget among individual component dimensions

Answer

Assigning quality control responsibilities to machine operators

Answer

Marking dimensions that require special inspection procedures

Answer

Identifying the datum references for each geometric feature