Datum Dynasty
What does UAME stand for?
Unrelated Actual mating envelope
What are the 2 organizations that publish GD&T standards?
ASME & ISO
A Position tolerance primarily controls which element of a Feature of Size?
A. Surface texture
B. Circular elements of the surface
C. Axis, center point, or midplane
D. Flatness of the feature
C. Axis, center point, or midplane
Extension lines alone create a Continuous Feature? - TRUE or FALSE
FALSE
What is Rule #2 called?
Regardless of feature size (RFS)
A feature axis is derived using?
A. RAME
B. DRF
C. UAME
D. MMC
C. UAME - Unrelated Actual Mating Envelope
How many GD&T feature symbols is there?
A. 17
B. 21
C. 9
D. 14
D. 14
A hole location is defined with basic dimensions, but no position tolerance is applied.
What do the basic dimensions establish?
A. The allowable variation of the hole location
B. The exact theoretical location of the hole
C. Bonus tolerance
D. The datum reference frame
B. The exact theoretical location of the hole
Name 1 (one) of the 3 questions in the GD&T Basics Tolerancing Framework.
1. What is being controlled?
2. What is the tolerance zone?
3. How is it constrained?
Under Rule #2, increasing a hole size from MMC toward LMC will:
A. Increases the tolerance zone
B. Decreases the tolerance zone
C. Has no effect on the tolerance zone
D. Converts the tolerance to Bonus Tolerance
C. Has no effect on the tolerance zone
A feature identified as Datum A will always be the primary datum - TRUE or FALSE
FALSE
What was the first-year GD&T standards were developed?
A. 1931
B. 1949
C. 1954
D. 1947
B. 1949
What formula is used to convert coordinate dimensions to a position tolerance?
Pythagorean Theorem
Under RFS, feature size changes a Ø.008 position tolerance? - TRUE OR FALSE
FALSE
Which modifier allows additional geometric tolerance as a feature departs from Maximum Material Condition?
A. RFS
B. MMC
C. Datum Target
D. Basic Dimension
B. MMC
A Datum axis is derived using?
A. UAME
B. RAME
C. MMC
D. RFS
B. RAME - Related Actual Mating Envelope
What does ISO stand for?
the International Organization for Standardization
A Position tolerance requires datums because the datums establish what?
A. Feature size
B. Datum Reference Frame
C. Material condition
D. Form tolerance
B. Datum Reference Frame
A Feature Control Frame is attached to a hole's size dimension. What element of the feature is being controlled?
A. The hole surface elements
B. The hole axis
C. The hole diameter
D. The datum reference frame
B. The hole axis
What modifier allows bonus tolerance?
MMC modifier
Name the 3 datum targets.
Who is credited as the orginator of GD&T
Stanley Parker
A hole is located using basic dimensions from Datums A, B, and C. Those basic dimensions define this exact location from which Position error is measured.
True Position
Why use MMC on position?
Additional tolerance while protecting function
Hole MMC=.625, actual=.630. What is the bonus tolerance?
.005