Which dimensioning mistake involves omitting tolerances for any dimension?

• A. Omitting tolerances for ANY dim
• B. Including too many decimals
• C. Using consistent fonts
• D. Providing a title block only

Answer: (A)

Dimensioning drawings requires tolerances for every dimension to show how much variation is allowable. Omitting tolerances for any dimension leaves the limits undefined, so machinists can’t know how precise a part must be. That ambiguity can lead to parts that don’t fit, function poorly, or incur costly rework or scrap because there’s no agreed acceptable range. The other issues mentioned—having too many decimals, using inconsistent fonts, or providing a title block only—affect precision, readability, or completeness, but they don’t address the fundamental need to specify allowable variation for each dimension.