Exam 10: Dimensioning

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Normally a jig or fixture is drawn as an assembly of the unit ready for use, and the workpiece or part to be held is drawn in position. How is the workpiece drawn in relationship to the jig or fixture?

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Question 1

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. Normally the workpiece is drawn using phantom lines, in a color such as red, or a combination of phantom lines and color.

Describe how holes are located.

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. Locate a hole center in the view where the hole appears as a circle, or in a sectional view.

Define and describe the use of progressive dies.

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Question 3

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. Progressive dies are the tooling used for punch press operation.

Describe the use of drill jigs.

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Question 4

Given the following CAD drawing, calculate the allowance. Show and label the elements of your calculation.

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Question 5

List at least two reasons why CADD layering can assist the dimensioning process.

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Question 6

Describe running and sliding fits (RC), locational fits (LC, LT, LN), and force fits (FN).

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Question 7

Describe a clearance fit.

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Question 8

Explain the purpose of the ISO 9000-1.

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Question 9

Define parting line.

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Question 10

Give the name of the organization that represents the United States in the ISO 9000.

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Question 11

How are notes for holes dimensioned on an engineering document?

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Question 12

Name five items that a CADD system needs in order to place a dimension.

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Question 13

Define the following terms; examples can be used if appro- priate: actual size; bilateral tolerance; dimension; feature; limits of dimension; specified dimension; tolerance; unilat- eral tolerance.

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Question 14

With standard metric limits and fits using close running fits, determine the limits of a 25-mm hole. Give the required di- mension with limits followed by the code in parentheses.

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Question 15

Establish the shaft and hole limits for a .25 in. diameter shaft using an RC4 fit. Show and label the elements of your calculations.

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Question 16

Using standard metric limits and fits with tolerances of close running fits, determine the limits of a 25-mm shaft. Display the required dimension with limits followed by the code in parentheses.

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Question 17

Name two classifications of dimensions.

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Question 18

Discuss proper dimension line spacing.

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Question 19

Describe a delta note and when it is used.

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Question 20

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Exam 10: Dimensioning

Normally a jig or fixture is drawn as an assembly of the unit ready for use, and the workpiece or part to be held is drawn in position. How is the workpiece drawn in relationship to the jig or fixture?

Describe how holes are located.

Define and describe the use of progressive dies.

Describe the use of drill jigs.

Given the following CAD drawing, calculate the allowance. Show and label the elements of your calculation.

List at least two reasons why CADD layering can assist the dimensioning process.

Describe running and sliding fits (RC), locational fits (LC, LT, LN), and force fits (FN).

Describe a clearance fit.

Explain the purpose of the ISO 9000-1.

Define parting line.

Give the name of the organization that represents the United States in the ISO 9000.

How are notes for holes dimensioned on an engineering document?

Name five items that a CADD system needs in order to place a dimension.

Define the following terms; examples can be used if appro- priate: actual size; bilateral tolerance; dimension; feature; limits of dimension; specified dimension; tolerance; unilat- eral tolerance.

With standard metric limits and fits using close running fits, determine the limits of a 25-mm hole. Give the required di- mension with limits followed by the code in parentheses.

Establish the shaft and hole limits for a .25 in. diameter shaft using an RC4 fit. Show and label the elements of your calculations.

Using standard metric limits and fits with tolerances of close running fits, determine the limits of a 25-mm shaft. Display the required dimension with limits followed by the code in parentheses.

Name two classifications of dimensions.

Discuss proper dimension line spacing.

Describe a delta note and when it is used.

Introduction to Engineering Drawing and Design Test

Drafting Equipment, Media, and Reproduction Methods

Computer-Aided Design and Drafting Cadd

Manufacturing Materials and Processes

Sketching Applications

Lines and Lettering

Drafting Geometry

Multiviews

Auxiliary Views

Fasteners and

Sections, Revolutions, and Conventional Breaks

Geometric Dimensioning and Tolerancing

Pictorial Drawings and Technical Illustrations

Working Drawings

Mechanisms: Linkages, Cams, Gears, and Bearings

Belt and Chain Drives

Welding Processes and Representations

Precision Sheet Metal Drafting

Electrical and Electronic Drafting

Industrial Process Piping

Structural Drafting

Heating, Ventilating, and Air-Conditioning Hvac, and Pattern Development

Civil Drafting Problems

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