CDT CDT Geometric Dimensioning & Tolerancing 2

Question 1

What is the purpose of a feature control frame in GD&T?

Accepted Answer

To convey the geometric tolerance for a feature

Answer

A feature control frame is a rectangular box on a drawing that communicates the type of geometric control, tolerance value, and applicable datums for a feature.

Question 2

Which condition describes when a feature of size contains the least amount of material within its tolerance?

Accepted Answer

Least Material Condition (LMC)

Answer

Least Material Condition (LMC) is the condition where a feature contains the minimum amount of material, such as the smallest shaft or largest hole within tolerance.

Question 3

Runout tolerance is always measured with the part:

Accepted Answer

Rotating about a datum axis

Answer

Runout is a composite control measured by rotating the part about the specified datum axis while a dial indicator contacts the controlled surface.

Question 4

What is the difference between circular runout and total runout?

Accepted Answer

Circular runout is measured at individual cross-sections; total runout covers the entire surface

Answer

Circular runout controls variation at each individual cross-section independently, while total runout controls the entire surface simultaneously during full rotation.

Question 5

Which GD&T symbol controls the taper or cone shape of a feature relative to a datum axis?

Accepted Answer

Angularity

Answer

Angularity controls the orientation of a surface or axis at a specified angle (other than 0° or 90°) relative to a datum.

(CDT) Certified Drafting Technician Practice Test

(CDT) Certified Drafting Technician Practice Test

CDT CDT Geometric Dimensioning & Tolerancing 2