IET 451 CHAPTER 1&2 EXAM QUESTIONS ANSWERED CORRECTLY LATEST UPDATE 2026
True or False? Geometric dimensioning and tolerancing is the dimensioning and tolerancing of
features to define permissible variations relating to the characteristics of form, profile, orientation,
and runout, or the relationship between features. - Answers T
True or False? A specified dimension is the total amount a dimension or feature is permitted to vary. -
Answers F
True or False? Mechanical drafting is the form of drafting used by the manufacturing industry. -
Answers T
True or False? Drawings in the United States are commonly produced using first-angle projection. -
Answers F
True or False? The American Society of Mechanical Engineers (ASME) and the International
Organization for Standardization (ISO) publish the primary GD&T standards that designers and
manufacturers reference today. - Answers T
True or False? ASME standards primarily govern work done in Europe, and ISO standards are primarily
used in the United States. - Answers F
True or False? A directly toleranced dimension is a dimension with an associated plus and minus (±)
tolerance or limit dimension values. - Answers T
True or False? Geometric tolerancing refers to the use of coordinate dimensioning without datums. -
Answers F
True or False? A bilateral tolerance is a tolerance permitted to vary in only one direction. - Answers F
True or False? Coordinate tolerancing uses the rectangular coordinate system to locate the features
of a part - Answers T
True or False? GD&T uses a reference coordinate system of datums to locate the features of a part. -
Answers T
True or False? A datum is an actual feature on a part, such as a surface identified with a datum
feature symbol. - Answers F
True or False? Coordinate tolerancing establishes a standard method for defining a system origin
where dimensions are measured from right to left. - Answers F
True or False? Minimum shaft diameter and maximum hole diameter are MMC applications. -
Answers F
True or False? Geometric tolerancing uses basic dimensions and positional tolerancing with cylindrical
tolerance zones to overcome tolerance buildup. - Answers T
True or False? A surface model contains information about object edges, vertices, surfaces, and mass.
- Answers F
17. True or False? The most common CADD formats used in the manufacturing industry are 2D
multiview drawings and 3D solid models. - Answers T
True or False? Because CADD automates the application of GD&T symbols, the designer does not
need to be concerned with using correct drafting practices. - Answers F
True or False? PMI tools are software tools used to apply annotations to a 3D model. - Answers T
True or False? Computer-aided manufacturing (CAM) involves the use of computer-controlled
machine tools to automate manufacturing processes. - Answers T
1. A _____ is a representation of an object that shows object length, width, and/or height on a flat
plane. A. 2D drawing B. 3D drawing
C. surface model D. solid model - Answers A
2. A(n) _____ is a representation that encloses a volume and contains information about mass.
A. 2D drawing B. solid model
C. surface model D. orthographic view - Answers B
3. A(n) _____ is the total amount a dimension or feature is permitted to vary. A. annotation B.
specified dimension
C. standard D. tolerance - Answers D
4. _____ is the general term that refers to the types of tolerances used to control form, profile,
orientation, location, and runout. A. Dimensioning B. Modeling
C. Geometric tolerancing D. Tolerancing - Answers C
5. The form of drafting used by the manufacturing industry is _____ drafting. A. architectural B. civil
C. structural D. mechanical - Answers D
, 6. The ASME _____ standard specifies approved dimensioning and tolerancing practices for
engineering drawings. A. Y14.1 B. Y14.3
C. Y14.5 D. Y14.8 - Answers C
7. Which of the following is not one of the benefits of GD&T? A. GD&T helps reduce the number of
design revisions. B. Tolerance accumulation is overcome through the use of chain dimensioning. C.
Parts can be produced within specified tolerances to allow for interchangeable manufacturing.
D. GD&T helps ensure that defective parts are rejected and quality parts are accepted. - Answers B
8. A _____ dimension has an associated plus and minus (±) tolerance or limit dimension values.
A. basic B. directly toleranced
C. reference D. limited - Answers B
9. Which of the following methods uses the rectangular coordinate system to locate the features of a
part according to linear distances from the X, Y, and Z axes?
A. Descriptive geometry B. Geometric tolerancing
C. Polar coordinate dimensioning D. Coordinate tolerancing - Answers D
10. A(n) _____ tolerance is permitted to vary in both the plus (+) and minus (-) directions from the
specified dimension. A. bilateral B. specified
C. basic D. interchangeable - Answers A
11. A _____ dimension is the part of the dimension from where the limits are calculated.
A. basic B. reference
C. specified D. limit - Answers C
A _____ is a theoretically perfect plane, surface, point, line, axis, or a combination thereof, derived
from the true geometric counterpart. A. datum B. datum feature
C. datum feature simulator D. simulated datum - Answers A
13. A _____ is a physical boundary used to establish a simulated datum from a specified datum
feature. A. datum plane B. datum feature
C. datum feature simulator D. true geometric counterpart - Answers C
14. A _____ is an actual feature of a part used to establish a datum. A. simulated datum B. datum
feature
C. datum feature simulator D. true geometric counterpart - Answers B
15. A _____ is a point, axis, line, or plane, or a combination thereof, derived from a datum feature
simulator.
A. datum B. simulated datum. C.datum feature D. true geometric counterpart - Answers B
16. Tolerance accumulation is associated with chain dimensioning and _____. A. descriptive geometry
B. model geometry
C. geometric tolerancing D. coordinate tolerancing - Answers D
17. A(n) _____ model is a 3D model in which dimensions and GD&T information are applied directly to
the model geometry. A. surface B. associated
C. annotated D. engineering - Answers C
18. Model-based definition is also referred to as _____. A. digital product definition B. product and
manufacturing information C. computer numerical control D. engineering drafting - Answers A
19. A _____ relies on an associated model to define features. A. feature control frame B. basic
dimension
C. true geometric counterpart D. limited dimension drawing - Answers D
20. Which of the following processes uses computer-controlled machine tools to automate machining
processes? A. Mechanical computer-aided design B. Computer-aided manufacturing C. Mechanical
drafting D. Engineering drafting - Answers B
True or False? The general note UNLESS OTHERWISE SPECIFIED, ALL DIMENSIONS ARE IN
MILLIMETERS should be placed on the drawing when dimensions are in millimeters. - Answers T
True or False? The general note UNLESS OTHERWISE SPECIFIED, ALL DIMENSIONS ARE IN INCHES
should be placed on the drawing when dimensions are in inches. - Answers T
True or False? The decimal point and zero are omitted when the metric dimension is a whole number.
- Answers T
True or False? A zero precedes a decimal millimeter dimension that is less than one. - Answers T
True or False? When the metric dimension is greater than a whole number by a fraction of a
millimeter, the last digit to the right of the decimal point is followed by one or more zeros depending
on the tolerance. - Answers F
True or False? Geometric dimensioning and tolerancing is the dimensioning and tolerancing of
features to define permissible variations relating to the characteristics of form, profile, orientation,
and runout, or the relationship between features. - Answers T
True or False? A specified dimension is the total amount a dimension or feature is permitted to vary. -
Answers F
True or False? Mechanical drafting is the form of drafting used by the manufacturing industry. -
Answers T
True or False? Drawings in the United States are commonly produced using first-angle projection. -
Answers F
True or False? The American Society of Mechanical Engineers (ASME) and the International
Organization for Standardization (ISO) publish the primary GD&T standards that designers and
manufacturers reference today. - Answers T
True or False? ASME standards primarily govern work done in Europe, and ISO standards are primarily
used in the United States. - Answers F
True or False? A directly toleranced dimension is a dimension with an associated plus and minus (±)
tolerance or limit dimension values. - Answers T
True or False? Geometric tolerancing refers to the use of coordinate dimensioning without datums. -
Answers F
True or False? A bilateral tolerance is a tolerance permitted to vary in only one direction. - Answers F
True or False? Coordinate tolerancing uses the rectangular coordinate system to locate the features
of a part - Answers T
True or False? GD&T uses a reference coordinate system of datums to locate the features of a part. -
Answers T
True or False? A datum is an actual feature on a part, such as a surface identified with a datum
feature symbol. - Answers F
True or False? Coordinate tolerancing establishes a standard method for defining a system origin
where dimensions are measured from right to left. - Answers F
True or False? Minimum shaft diameter and maximum hole diameter are MMC applications. -
Answers F
True or False? Geometric tolerancing uses basic dimensions and positional tolerancing with cylindrical
tolerance zones to overcome tolerance buildup. - Answers T
True or False? A surface model contains information about object edges, vertices, surfaces, and mass.
- Answers F
17. True or False? The most common CADD formats used in the manufacturing industry are 2D
multiview drawings and 3D solid models. - Answers T
True or False? Because CADD automates the application of GD&T symbols, the designer does not
need to be concerned with using correct drafting practices. - Answers F
True or False? PMI tools are software tools used to apply annotations to a 3D model. - Answers T
True or False? Computer-aided manufacturing (CAM) involves the use of computer-controlled
machine tools to automate manufacturing processes. - Answers T
1. A _____ is a representation of an object that shows object length, width, and/or height on a flat
plane. A. 2D drawing B. 3D drawing
C. surface model D. solid model - Answers A
2. A(n) _____ is a representation that encloses a volume and contains information about mass.
A. 2D drawing B. solid model
C. surface model D. orthographic view - Answers B
3. A(n) _____ is the total amount a dimension or feature is permitted to vary. A. annotation B.
specified dimension
C. standard D. tolerance - Answers D
4. _____ is the general term that refers to the types of tolerances used to control form, profile,
orientation, location, and runout. A. Dimensioning B. Modeling
C. Geometric tolerancing D. Tolerancing - Answers C
5. The form of drafting used by the manufacturing industry is _____ drafting. A. architectural B. civil
C. structural D. mechanical - Answers D
, 6. The ASME _____ standard specifies approved dimensioning and tolerancing practices for
engineering drawings. A. Y14.1 B. Y14.3
C. Y14.5 D. Y14.8 - Answers C
7. Which of the following is not one of the benefits of GD&T? A. GD&T helps reduce the number of
design revisions. B. Tolerance accumulation is overcome through the use of chain dimensioning. C.
Parts can be produced within specified tolerances to allow for interchangeable manufacturing.
D. GD&T helps ensure that defective parts are rejected and quality parts are accepted. - Answers B
8. A _____ dimension has an associated plus and minus (±) tolerance or limit dimension values.
A. basic B. directly toleranced
C. reference D. limited - Answers B
9. Which of the following methods uses the rectangular coordinate system to locate the features of a
part according to linear distances from the X, Y, and Z axes?
A. Descriptive geometry B. Geometric tolerancing
C. Polar coordinate dimensioning D. Coordinate tolerancing - Answers D
10. A(n) _____ tolerance is permitted to vary in both the plus (+) and minus (-) directions from the
specified dimension. A. bilateral B. specified
C. basic D. interchangeable - Answers A
11. A _____ dimension is the part of the dimension from where the limits are calculated.
A. basic B. reference
C. specified D. limit - Answers C
A _____ is a theoretically perfect plane, surface, point, line, axis, or a combination thereof, derived
from the true geometric counterpart. A. datum B. datum feature
C. datum feature simulator D. simulated datum - Answers A
13. A _____ is a physical boundary used to establish a simulated datum from a specified datum
feature. A. datum plane B. datum feature
C. datum feature simulator D. true geometric counterpart - Answers C
14. A _____ is an actual feature of a part used to establish a datum. A. simulated datum B. datum
feature
C. datum feature simulator D. true geometric counterpart - Answers B
15. A _____ is a point, axis, line, or plane, or a combination thereof, derived from a datum feature
simulator.
A. datum B. simulated datum. C.datum feature D. true geometric counterpart - Answers B
16. Tolerance accumulation is associated with chain dimensioning and _____. A. descriptive geometry
B. model geometry
C. geometric tolerancing D. coordinate tolerancing - Answers D
17. A(n) _____ model is a 3D model in which dimensions and GD&T information are applied directly to
the model geometry. A. surface B. associated
C. annotated D. engineering - Answers C
18. Model-based definition is also referred to as _____. A. digital product definition B. product and
manufacturing information C. computer numerical control D. engineering drafting - Answers A
19. A _____ relies on an associated model to define features. A. feature control frame B. basic
dimension
C. true geometric counterpart D. limited dimension drawing - Answers D
20. Which of the following processes uses computer-controlled machine tools to automate machining
processes? A. Mechanical computer-aided design B. Computer-aided manufacturing C. Mechanical
drafting D. Engineering drafting - Answers B
True or False? The general note UNLESS OTHERWISE SPECIFIED, ALL DIMENSIONS ARE IN
MILLIMETERS should be placed on the drawing when dimensions are in millimeters. - Answers T
True or False? The general note UNLESS OTHERWISE SPECIFIED, ALL DIMENSIONS ARE IN INCHES
should be placed on the drawing when dimensions are in inches. - Answers T
True or False? The decimal point and zero are omitted when the metric dimension is a whole number.
- Answers T
True or False? A zero precedes a decimal millimeter dimension that is less than one. - Answers T
True or False? When the metric dimension is greater than a whole number by a fraction of a
millimeter, the last digit to the right of the decimal point is followed by one or more zeros depending
on the tolerance. - Answers F
