GD&T Quiz - Fundamentals - Pacific Inspection, Co

Fundamentals of GD&T Quiz
(courtesy of Applied Geometrics, Inc.)

Geometric Dimensioning and Tolerancing Quiz ASME Y14.5 – 2009

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This test is for the evaluation of knowledge and skills in Geometric Dimensioning & Tolerancing per the ASME Y14.5 -2009 standard.

Welcome to your GDT Quiz - Fundamentals

Which statement best describes what the ASME-Y14.5 - 2009 covers?

a) Dimensioning and tolerancing standards for drafting and gaging of rigid mechanical parts.

b) A symbolic means of dimensioning and tolerancing.

c) Dimensioning and tolerancing standard with respect to how parts are manufactured.

d) Establishes uniform practices for stating and interpreting dimensioning, tolerancing, and related requirements for use on engineering drawings and related documents.

Using GD&T:

a) Tighter tolerances can be achieved in manufacturing.

b) Creates a means for expressing the true design requirements for a part.

c) More tolerance is made available to manufacturing than is possible with only plus/minus tolerancing

d) Both b) and c)

How can properly implemented GD&T save money in the manufacturing process?

a) Better definition of the design requirements, increased availability of tolerances, better communication between design, manufacturing and inspection, fewer engineering changes.

b) It can't. GD&T is just a way to illustrate how to inspect parts.

c) By creating extra tolerance that did not physically exist without using GD&T.

d) By defining the datum references that must be used by manufacturing for fixturing.

What is a Basic Dimension?

a) An exact dimension with no tolerance associated with it.

b) A dimension in a box that must be strictly adhered to by manufacturing.

c) The nominal size of a feature.

d) A numerical value that describes a theoretically exact size, profile, orientation or location of a feature or a datum target. It is the basis from which permissible variations (tolerances) are established.

What is a Feature Control Frame?

a) A symbolic means of expressing the type of control on a feature, and defining a tolerance zone for that control.

b) A box on the drawing that tells the manufacturer how to make the part.

c) A box on the drawing that tells the inspector what measurements have to be made for every part.

d) A symbol that dictates the tolerance of position for a datum target.

Select the description for each Geometric Characteristic Symbol:

What is a "Material Condition Modifier?"

a) The maximum dimension possible according to the tolerance specified.

b) The minimum dimension possible according to the tolerance specified.

c) A symbol placed on a feature of size that states how much tolerance is available for that feature.

d) Establishes uniform practices for stating and interpreting dimensioning, tolerancing, and related requirements for use on engineering drawings and related documents.

A positional tolerance defines:

a) A zone within which the center, axis, or center plane of a feature of size is permitted to vary from a true position.

b) A boundary located at the true position that may not be violated by the surface or surfaces of the considered feature, if the position specification is on an MMC or LMC basis.

c) Both a and b.

d) Neither a nor b.

Which is the correct definition of regardless of feature size?

a) Regardless of where a feature of size lies within its form tolerance, the tolerance of size must be met.

b) Control placed on a feature of size stating that the tolerance of form or position must be met regardless of where the feature lies within its form tolerance.

c) Regardless of where a feature of size lies within its size tolerance, the tolerance of size must be met.

d) Control placed on a feature of size stating that the geometric tolerance must be met regardless of where the feature lies within its size tolerance.

What is "Rule 1" (i.e. the "Envelope Rule" or the "Perfect form at MMC Rule"), and what effect does it have, if any, on flatness? ...straightness? ...perpendicularity? ...position?

a) Unless otherwise specified, the limits of size of an individual feature of size control the form of the feature as well as the size. The rule can control flatness and straightness, but not perpendicularity or position.

b) Size tolerance controls form tolerance. This rule has no effect on flatness, straightness, or position.

c) If specified by using an MMC symbol next to the tolerances in a feature control frame, then size tolerance controls form. It affects flatness, straightness, perpendicularity and position.

d) Rule 1 states that the form of a feature must always be perfect, but it has no effect on perpendicularity.

What is the difference between a Datum and a Datum Feature?

a) A Datum and Datum Feature are synonymous.

b) A Datum is theoretical, a Datum Feature is real.

c) A Datum is a feature of size, and a Datum Feature is a surface feature.

d) A Datum Feature is theoretical, and a Datum is real.

What is a Datum Reference Frame?

a) Any arbitrary coordinate system.

b) A set of target points from which measurements are made.

c) A symbol on the drawing that specifies the tolerance associated with a particular feature.

d) A set of three mutually perpendicular planes derived from the specified Datum Features in the order of precedence listed in a feature control frame.

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Fundamentals of GD&T Quiz
(courtesy of Applied Geometrics, Inc.)

Geometric Dimensioning and Tolerancing Quiz ASME Y14.5 – 2009

Welcome to your GDT Quiz - Fundamentals

Select the description for each Geometric Characteristic Symbol:

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Fundamentals of GD&T Quiz(courtesy of Applied Geometrics, Inc.)

Geometric Dimensioning and Tolerancing Quiz ASME Y14.5 – 2009

Welcome to your GDT Quiz - Fundamentals

Select the description for each Geometric Characteristic Symbol:

QUICK MENU

Fundamentals of GD&T Quiz
(courtesy of Applied Geometrics, Inc.)