Exam 16: Size Datum Features Mmb

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When referencing a planar surface as a primary datum feature and a pattern of holes as a secondary datum feature MMB, ____________________ degrees of freedom are constrained.

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(Short Answer)

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Question 1

Correct Answer:

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six
6

When referencing coaxial diameters as primary co-datums MMB, what six conditions apply?

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Question 2

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The six conditions that apply when referencing coaxial diameters as primary co-datums MMB are:
1. The datum is an axis (line).
2. The axis of the datum feature simulators is the datum axis.
3. The datum feature simulators are fixed at the MMB size.
4. The part is oriented by the datum feature simulator.
5. The datum reference frame consists of two planes passing through the datum axis.
6. Four degrees of freedom are constrained (two translational and two rotational).

When referencing a planar surface as a primary datum feature, a diameter as a secondary datum feature MMB, and a width as a tertiary datum feature MMB, the part will have a minimum of four-point contact with the primary datum feature simulator.

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(True/False)

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Question 3

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False

What is the formula for a primary datum feature MMC size calculation for a simple application (no straightness or flatness applied to the size dimension of the datum feature)?

(Short Answer)

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Question 4

Where a width is used as a datum feature at MMB, ____________________ degrees of freedom are constrained.

(Short Answer)

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Question 5

Where a feature of size datum feature is referenced as a primary datum feature at MMC, the datum feature simulator is a fixed-size.

(True/False)

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Question 6

Where a pattern of holes is used as a datum feature, the spacing between the holes should be defined.

(True/False)

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Question 7

Where a coaxial datum feature is referenced at MMB, two degrees of freedom are constrained.

(True/False)

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Question 8

____________________ is the allowable movement or looseness between the part datum feature and the datum feature simulator.

(Short Answer)

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Question 9

What are the two effects that occur where a datum feature is referenced at MMB?

(Essay)

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Question 10

Explain where datum shift is additive to a geometric tolerance and where it is not.

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Question 11

The ____________________ is the boundary established by the collective effects of the MMC of a datum feature and any applicable tolerances.

(Essay)

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Question 12

Devices that are fixed in size, such as a precision hole, width, or pin, may be used as the datum feature simulator.

(True/False)

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Question 13

When referencing a planar surface as a primary datum and a diameter as a secondary datum feature MMB, what six conditions apply?

(Essay)

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Question 14

Where a diameter is used as a primary datum feature at MMB, ____________________ degrees of freedom are constrained.

(Short Answer)

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Question 15

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Exam 16: Size Datum Features Mmb

When referencing a planar surface as a primary datum feature and a pattern of holes as a secondary datum feature MMB, ____________________ degrees of freedom are constrained.

When referencing coaxial diameters as primary co-datums MMB, what six conditions apply?

When referencing a planar surface as a primary datum feature, a diameter as a secondary datum feature MMB, and a width as a tertiary datum feature MMB, the part will have a minimum of four-point contact with the primary datum feature simulator.

What is the formula for a primary datum feature MMC size calculation for a simple application (no straightness or flatness applied to the size dimension of the datum feature)?

Where a width is used as a datum feature at MMB, ____________________ degrees of freedom are constrained.

Where a feature of size datum feature is referenced as a primary datum feature at MMC, the datum feature simulator is a fixed-size.

Where a pattern of holes is used as a datum feature, the spacing between the holes should be defined.

Where a coaxial datum feature is referenced at MMB, two degrees of freedom are constrained.

____________________ is the allowable movement or looseness between the part datum feature and the datum feature simulator.

What are the two effects that occur where a datum feature is referenced at MMB?

Explain where datum shift is additive to a geometric tolerance and where it is not.

The ____________________ is the boundary established by the collective effects of the MMC of a datum feature and any applicable tolerances.

Devices that are fixed in size, such as a precision hole, width, or pin, may be used as the datum feature simulator.

When referencing a planar surface as a primary datum and a diameter as a secondary datum feature MMB, what six conditions apply?

Where a diameter is used as a primary datum feature at MMB, ____________________ degrees of freedom are constrained.

Drawing Standards

Dimensions, Tolerances, and Notes Used on Drawings

Coordinate Tolerancing and Geometric Dimensioning and Tolerancing GDT

General Dimensioning Symbols

Key GDT Terms

Symbols and Modifiers

GDT Rules

GDT Concepts

Flatness Tolerance

Straightness Tolerance

Circularity Tolerance

Cylindricity Tolerance

The Datum System

Datum Targets

Size Datum Features Rmb

Perpendicularity Tolerance

Parallelism Tolerance

Angularity Tolerance

Position Tolerance - Introduction

Position Tolerance - RFS and MMC

Position Tolerance - Special Applications

Position Tolerance Calculations

Circular and Total Runout Tolerances

Concentricity and Symmetry Tolerances

Profile Tolerance - Basic Concepts

Profile Tolerance Applications

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