CDT Geometric Dimensioning & Tolerancing Flashcards
6 cards from real CDT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 CDT Geometric Dimensioning & Tolerancing flashcards as text
Which GD&T symbol is used to control the straightness of a surface or axis?
Answer: Straightness
Straightness is the GD&T symbol that controls how straight a surface line element or axis must be.
What does the Maximum Material Condition (MMC) modifier mean when applied to a feature of size?
Answer: The feature has the greatest amount of material within its tolerance
MMC refers to the condition where a feature of size contains the maximum amount of material permitted by its tolerance, such as the largest shaft or smallest hole.
Which datum reference frame axis is typically the primary datum in a three-plane datum reference system?
Answer: The axis established by the largest flat surface
The primary datum is typically established by the largest flat surface because it provides the most stable three-point contact with the datum reference frame.
A true position tolerance of ⌀0.010 at MMC means the positional tolerance zone is a:
Answer: Cylindrical zone of diameter 0.010
When a diameter symbol precedes the positional tolerance value, the tolerance zone is cylindrical with that diameter.
Which GD&T control establishes both the form and the location of a feature simultaneously?
Answer: Profile of a Surface
Profile of a Surface is a composite control that can simultaneously control the form, orientation, and location of a surface.
On a US engineering drawing, the default tolerance interpretation standard for GD&T is defined by which document?
Answer: ASME Y14.5
ASME Y14.5 is the American national standard that defines GD&T symbols, rules, and tolerancing principles used on US engineering drawings.