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Dimensioning Best Practices in Mechanical and Architectural Drawings

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Dimensioning Best Practices in Mechanical and Architectural Drawings

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Questions and Answers

What is the purpose of following dimensioning best practices as outlined in the article?

To comply with National CAD Standards (NCS, USA)

To ensure the machinist or drafter reads the drawing accurately every time (correct)

To make the drawing look more professional

To add unnecessary dimensions to the drawing

Which source provides most of the mechanical dimensioning best practices?

ASME Y14.5 M – 2018 (correct)

Architectural drawing best practices

Dimensioning best practices eBook

National CAD Standards (NCS, USA)

What should be avoided when adding dimensions to a drawing?

Adding unnecessary dimensions (correct)

Using different scales for dimensions

Following National CAD Standards (NCS, USA)

Omitting basic dimensions

When is it acceptable to duplicate dimensions in a drawing?

Only for dual dimensioning Signup and view all the answers

What is the purpose of adding dimensions with the correct scale?

To ensure no scale conversion is required to infer the dimension Signup and view all the answers

In metric drawing, how should numbers less than 1 be formatted?

Include a leading zero, like 0.32 Signup and view all the answers

When should surface finish marks be omitted on a drawing?

On holes or cylinders when a note specifies the machining operation Signup and view all the answers

What is the recommended approach to avoid several dimensions in a drawing?

Use Ordinate dimensioning Signup and view all the answers

When should unit be included in the drawing for dimensions?

When it is clearly necessary, like labeling size of a component in a different unit Signup and view all the answers

What is the purpose of using centerlines or dimensions for symmetrical parts in a drawing?

To ensure accurate representation of the parts Signup and view all the answers