GD&T Ch 9-16

If a 10.2-10.6 diameter hole is designated as a datum feature and is referenced as a primary datum at MMB, the size of the datum feature simulator would be________________ . A. 10.2 B. 10.4 C. 10.6 D. Variable between 10.2 and 10.6

A. 10.2

5. Identifying two coaxial features of size as a datum feature establishes___________________. A. An axis as the datum B. Two axes as the datum C. A datum target D. An axis and a point as the datums

A. An axis as the datum

_________ is a limit to one or more DOF. A. Constraint B. Restraint C. Simulated datum D. Datum feature simulator

A. Constraint

When using datum target points to establish a primary datum from a planar surface, ______ targets must be specified. A. 6 B. 3 C. 2 D. 1

B. 3

Where a width is referenced as a primary datum at RMB, the datum is... A. An axis B. A center plane C. An area D. A point

B. A center plane

One method of inspecting a flatness tolerance (at MMC) applied to a feature of size is: A. A surface plate and dial indicator B. A functional gage made to the virtual condition size C. A surface plate and a feeler gage D. A caliper

B. A functional gage made to the virtual condition size

If an external diameter of a shaft was a datum feature referenced as primary at RMB, the best choice for a datum feature simulator would be__________________. A. A v-block B. A precision chuck or collet C. A functional gage D. None of the above

B. A precision chuck or collet

When referencing a datum feature of size at RMB primary, the datum feature simulator is... A. Fixed at the RMB size B. Adjustable in size C. Fixed at the MMB size D. Adjustable in location

B. Adjustable in size

A real-world application for a cylindricity tolerance is: A. Assembly (i.e., shaft and hole) B. Bearing journals on shafts C. Rotating clearance (i.e., shaft and housing) D. Sealing surface (between two shafts)

B. Bearing journals on shafts

A _____________ is a gage element used to establish a simulated datum: A. Datum feature B. Datum feature simulator (physical) C. Datum feature simulator (theoretical) D. Datum reference frame

B. Datum feature simulator (physical)

Where a straightness tolerance is applied to surface elements that are associated with a size dimension, and Rule #1 applies to the size dimension, the specified tolerance value _________ the size tolerance. A. Must be equal to B. Must be less than C. Must be greater than D. May be less than or greater than

B. Must be less than

A real-world application for a circularity tolerance is: A. Assembly (i.e., shaft and hole) B. Sealing surface (i.e., engines, pumps, valves) C. Rotating clearance (i.e., shaft and housing) D. Support (equal load along a line element)

B. Sealing surface (i.e., engines, pumps, valves)

What type of deviation is not limited by a straightness tolerance? A. Waisting B. Taper C. Barreling D. All of the above

B. Taper

Which type of surface deviation is controlled by a cylindricity tolerance but not by a circularity tolerance? A. Ovality B. Taper C. Lobing D. None of the above

B. Taper

Where a datum feature is referenced MMB primary, the simulated datum is__________. A. The center of the datum feature B. The axis or center plane of the datum feature simulator C. Derived from the related actual mating envelope D. All of the above

B. The axis or center plane of the datum feature simulator

When clearance (looseness) exists between a datum feature and its datum feature simulator... A. The looseness may be used to decrease the part feature's acceptance criteria. B. The looseness may be used to increase the part feature's acceptance criteria. C. The looseness must be ignored by centering the part on the gage. D. The part is not acceptable.

B. The looseness may be used to increase the part feature's acceptance criteria.

Which flatness tolerance could pass the CARE test? A. flatness shape | ø0.1 B. flatness shape | 0.1Ⓜ C. flatness shape | 0.1 | A (datum) D. None of the above

B. flatness shape | 0.1Ⓜ

A circularity tolerance may use a _____ modifier. A. ø B. Ⓕ C. Ⓜ D. Ⓟ

B. Ⓕ

Which of the following modifiers may be applied with a cylindricity tolerance? A. Ⓜ B. Ⓕ C. Ⓟ D. ø

B. Ⓕ

On a part with all planar datums, what is the minimum number of points of contact with the datum feature simulator for a tertiary datum? A. 3 B. 2 C. 1 D. None (theoretically)

C. 1

All parts have ___ DOF. A. 2 B. 4 C. 6 D. 8

C. 6

For a feature other than a sphere, circularity is where: A. The axis is a straight line B. The ø modifier is specified with a size dimension C. All points of the surface intersected by any plane perpendicular to an axis or spine (curved line) are equidistant from that axis or spine D. All points of the surface intersected by any plane passing through a common center are equidistant from that center

C. All points of the surface intersected by any plane perpendicular to an axis or spine (curved line) are equidistant from that axis or spine

A derived median line is... A. The same as the axis of the actual mating envelope B. A perfectly straight line established from the virtual condition boundary C. An imperfect line formed by the center points of all cross sections of the feature of size D. A spine formed by the center points of all cross section of the actual mating envelope

C. An imperfect line formed by the center points of all cross sections of the feature of size

One place where datum targets should be used is on ________________________ . A. Features of size B. Simulated gages C. An irregular-shaped surface D. A planar surface

C. An irregular-shaped surface

How does the Rule #1 boundary affect the application of a circularity tolerance? A. The ø modifier must be used. B. The feature control frame must be placed next to the size dimension. C. The circularity tolerance value must be less than the limits of size tolerance. D. Circularity cannot be applied where a Rule #1 boundary exists.

C. The circularity tolerance value must be less than the limits of size tolerance.

How does Rule #1 affect the application of a flatness tolerance applied to a surface? A. Where Rule #1 exists, flatness cannot be applied B. The flatness tolerance value must be equal to the size tolerance C. The flatness tolerance value must be less than the size tolerance D. The flatness tolerance value must be greater than the size tolerance

C. The flatness tolerance value must be less than the size tolerance

The tolerance zone for flatness applied to a surface is: A. The space between two parallel lines B. The space between two parallel lines parallel to a datum plane C. The space between two parallel planes D. The space between a reference plane and a surface point

C. The space between two parallel planes

How are the basic dimensions defining the size, location, and orientation between datum targets toleranced? A. The designer must apply geometric tolerances to the datum target B. With general or title block tolerances C. With a class of gage tolerances D. None of the above; they must be perfect

C. With a class of gage tolerances

How is a datum target line typically simulated? A. With the edge of a gage block B. With a blade C. With the side of a cylindrical gage pin D. With a line of gage balls

C. With the side of a cylindrical gage pin

Which geometric tolerance can provide an indirect cylindricity control? A. circle inside circle B. ⌖ (position) C. double arrow (total runout) D. parallel

C. double arrow (total runout)

Which of the following modifiers cannot be used with a flatness tolerance? A. Ⓜ B. ø C. hexagon ST D. Ⓕ

C. hexagon ST

A datum axis may be established from ____________. A. A hole B. A shaft C. Coaxial features of size D. All of the above

D. All of the above

A datum feature simulator may be: A. A tangent plane B. A variable material boundary C. A datum target D. All of the above

D. All of the above

Rule #1 affects the straightness deviation on a: A. Planar feature of size B. Cylindrical feature of size C. Planar surface of a feature of size D. All of the above

D. All of the above

Where a straightness tolerance at MMC is applied to a cylindrical feature of size: A. The function is probably assembly B. A functional gage may be used to inspect the straightness C. Rule #1 is overridden D. All of the above

D. All of the above

Basic dimensions are used to locate datum targets because: A. They are exempt from title block tolerances B. To ensure repeatability between the part and the datum feature simulator. C. They define the nominal for the gagemaker. D. All of the above.

D. All of the above.

When verifying a circularity tolerance, the inspection method must be able to collect a set of points and determine the: A. Distance between two coaxial cylinders that contain the set of points B. Circle that circumscribes the set of points C. Circle that inscribes the set of points D. Distance between two coaxial circles that contain the set of points

D. Distance between two coaxial circles that contain the set of points

A circularity tolerance may be inspected with a roundness gage.

True

A datum axis is the axis of a datum feature simulator established from the datum feature.

True

A flatness tolerance may have a bonus tolerance.

True

A flatness tolerance may override Rule #1.

True

A flatness tolerance must be applied to a planar feature or width feature of size.

True

A straightness tolerance (at MMC) may be verified with a functional gage.

True

A straightness tolerance may be applied to a width feature of size dimension.

True

An MMB datum feature simulator is a fixedsize boundary.

True

An implied datum is an assumed plane, axis, or point from which a dimensional measurement is made.

True

Changing the order (sequence) of datum feature references in a feature control frame changes the relationships between part features and results in a different interpretation.

True

Datum feature shift is the allowable looseness between the datum feature and the datum feature simulator.

True

Datum features should be selected based on part functional requirements.

True

Datum sequence is usually communicated through feature control frames.

True

Datum targets describe the shape, size, and location of datum feature simulators.

True

Datum targets enable a stable relationship between the part and gage elements.

True

Flatness is the condition of being perfectly planar.

True

One benefit of using the datum system is the ability to make repeatable dimensional measurements.

True

One real-world application of a straightness tolerance is to ensure assembly.

True

RMB indicates that a datum feature simulator is adjustable (or movable).

True

Rule #1 limits circularity deviations.

True

The datum system constrains a part to restrict or remove some or all of the available DOF relative to a datum reference frame.

True

The datum target leader line may be solid or dashed line.

True

The placement of a straightness tolerance feature control frame affects the interpretation.

True

Two cylindrical features of size shown on the drawing with one center line are considered coaxial datum features.

True

When a datum feature is referenced at MMB, a fixed size datum feature simulator must be used.

True

Where a cylindrical feature of size is designated as a datum feature and referenced in a feature control frame as primary at RMB, the resulting datum is an axis.

True

A straightness tolerance cannot permit a bonus tolerance.

False

A straightness tolerance zone is two parallel planes.

False

An MMB is always equal to a Rule #1 boundary.

False

Cylindricity is the condition where all points of a circular element are equidistant from a common axis.

False

Datum target lines are often simulated with a conical shaped gage pin.

False

Implied datums communicate which surfaces should contact the inspection equipment.

False

Straightness is where an axis is a straight line.

False

The datum target leader line may be a solid or phantom line.

False

The specification of a cylindricity tolerance is incomplete without the ø modifier.

False

The tolerance zone of a circularity tolerance is a circle.

False

When a datum feature of size is referenced at MMB, a datum feature shift will always be available.

False

When two coaxial features of size are designated datum features and referenced as primary co-datums, five DOF are constrained.

False

Where a cylindrical feature of size is designated as a datum feature and referenced in a feature control frame as primary at RMB, three DOF are constrained.

False

Where a datum feature is referenced at MMB, the datum simulator size is adjustable.

False

Where a width is designated as a datum feature and referenced in a feature control frame as primary at RMB, four DOF are constrained.

False

When verifying a cylindricity tolerance, the inspection method must be able to collect a set of points and determine the: A. Distance between two coaxial cylinders that contain the set of points B. Cylinder that circumscribes the set of points C. Cylinder that inscribes the set of points D. Distance between two coaxial circles that contain the set of points

A. Distance between two coaxial cylinders that contain the set of points

Datum feature simulators (theoretical) must: A. Have perfect form B. Have location tolerance relative to one another C. Be variable in size where the MMB or LMB modifier is specified D. All of the above

A. Have perfect form

When verifying a flatness tolerance applied to a surface, the inspection method must measure the _____________ of the surface. A. High and low points B. Median plane C. High points D. Virtual condition

A. High and low points

Where Rule #1 applies to a cylindrical regular feature of size, the tolerance value of a cylindricity tolerance applied to the feature of size must be _______ the size tolerance. A. Less than B. Equal to C. Greater than D. None of the above

A. Less than

What type of variation is limited by a circularity tolerance zone? A. Ovality B. Tapering C. Bending D. Warping

A. Ovality

The tolerance zones for a straightness tolerance are: A. Two parallel lines or a cylinder B. Two lines and a cylinder C. Two parallel planes or a cylinder D. A parallel line or a cylinder

A. Two parallel lines or a cylinder

A flatness tolerance may have a datum reference if the datum feature is planar.

False

A flatness tolerance must be applied RFS.

False

A part may have no more than three datum features.

False

How many datum reference frames can a part have? A. 1 B. 2 C. 3 D. No limit (theoretically)

D. No limit (theoretically)

A circularity tolerance applies to the entire length, width, and depth of a feature simultaneously.

False

A circularity tolerance may use the Ⓜ modifier where a bonus tolerance is acceptable.

False

A circularity tolerance should be specified with the ø modifier.

False

A cylindricity tolerance can override Rule #1.

False

A cylindricity tolerance may be verified with a fixed limit gage.

False

A cylindricity tolerance may contain the MMC modifier.

False

A cylindricity tolerance value must be less than half the size tolerance.

False

A cylindricity tolerance zone is a cylinder.

False

A datum feature is theoretical.

False

A datum is a part surface, axis, or center plane.

False

A datum target point should be simulated with a sharp gage element, like a cone tip or needle point.

False

A derived median line is the same as an axis.

False