Answer the following statement(s) true (T) or false (F)

1. A 90 ? angle is assumed where centerlines and lines depicting features are shown
on a print at right angles and no angle is specified.
2. Unless otherwise specified, all dimensions are applicable at 98.8 ?F.
3. Metric units expressed in millimeters or U.S. customary units expressed in
decimal inches are considered the standard units of linear measurement on
engineering documents and prints.
4. Where millimeter dimensions are less than one, a zero precedes the decimal.


1. TRUE
2. FALSE
3. TRUE
4. TRUE

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What will be an ideal response?

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Fill in the blank(s) with the appropriate word(s).

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A yellow tag on a scaffold means that it _____

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