Which statement best defines nominal width?

Which statement best defines nominal width?

• A. The maximum permissible size
• B. The minimum permissible size
• C. The intended dimension before tolerance is applied
• D. The measured actual size

Answer: (C)

Nominal width is the intended target size before any tolerance is applied. This means it’s the dimension you aim for when manufacturing the part, not the allowable extremes or the measured value. The maximum permissible size and the minimum permissible size are the upper and lower tolerance limits that surround the nominal value, defining what can actually be tolerated. The measured actual size is the real dimension found on the part, which may vary within those limits. For example, a nominal width of 50 mm with a tolerance of ±0.2 mm gives an upper limit of 50.2 mm and a lower limit of 49.8 mm, while 50 mm is the target width.

Nominal width is the intended target size before any tolerance is applied. This means it’s the dimension you aim for when manufacturing the part, not the allowable extremes or the measured value. The maximum permissible size and the minimum permissible size are the upper and lower tolerance limits that surround the nominal value, defining what can actually be tolerated. The measured actual size is the real dimension found on the part, which may vary within those limits. For example, a nominal width of 50 mm with a tolerance of ±0.2 mm gives an upper limit of 50.2 mm and a lower limit of 49.8 mm, while 50 mm is the target width.