Pretest - Mechanical Drawing - Chapter 3

A drafting machine is a large, flat board on which a drawing sheet is attached to make a drawing. 

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A beam compass is used to draw small radii.

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Distances can be transferred from one place to another using dividers.

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A beam compass is used to draw small arcs and circles.

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Drafting instruments purchased in sets are called drafting media.

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The dividers is used to draw curves and circles.

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The architect's scale is divided into feet and inches.

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An A-size drawing sheet measures 11" x 17".

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If the title block of a drawing shows a scale of 12" = 1'0", this means the drawing is 1/4 size.

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Scales are used to lay off distances and to make measurements. 

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