GD&T - Geometric Dimensioning and Tolerancing GD&T Symbols and Rules Questions and Answers

Question 1

According to ASME Y14.5, which of the following is considered the default condition for all geometric tolerances unless a material condition modifier is specified?

Accepted Answer

Regardless of Feature Size (RFS)

Answer

Maximum Material Condition (MMC)

Answer

Least Material Condition (LMC)

Answer

Virtual Condition (VC)

Question 2

A drawing specifies a hole with a diameter of 10.5 ± 0.2 mm. A position tolerance of Ø0.1 mm is applied at Maximum Material Condition (MMC). If the actual measured size of the hole is 10.6 mm, what is the total available positional tolerance?

Accepted Answer

0.2 mm

Answer

0.1 mm

Answer

0.3 mm

Answer

0.4 mm

Question 3

Which GD&T rule, often called the 'Envelope Principle', states that for a regular feature of size, the limits of size also define the form of the feature at its Maximum Material Condition (MMC)?

Accepted Answer

Rule #1

Answer

Rule #2

Answer

The Taylor Principle

Answer

The Virtual Condition Rule

Question 4

A designer needs to control the form of a cylindrical pin to ensure it is both round and straight along its entire length. Which single GD&T symbol provides this three-dimensional control?

Accepted Answer

Cylindricity

Answer

Circularity

Answer

Straightness

Answer

Profile of a Surface

Question 5

In a Feature Control Frame, which of the following symbols is used to control the 3-dimensional form of any surface, including complex, curved, or irregular shapes, relative to a true profile?

Accepted Answer

Profile of a Surface

Answer

Flatness

Answer

Profile of a Line

Answer

Total Runout

Question 6

When inspecting a feature controlled by a circularity tolerance, which of the following is true?

Accepted Answer

Each circular element of the surface is assessed independently.

Answer

The tolerance must be related to a datum axis.

Answer

Maximum Material Condition (MMC) can be applied to gain bonus tolerance.

Answer

The tolerance controls both the roundness and straightness of the feature.