Which term describes the allowable variation between a feature and its basic dimensions?

Which term describes the allowable variation between a feature and its basic dimensions?

• A. A color property
• B. A tag attached to parts
• C. A measurement unit
• D. A description of the allowable variation between a feature and its basic dimensions

Answer: (D)

The main idea here is tolerance. In design and manufacturing, basic dimensions are exact values, and tolerance defines how much a feature is allowed to deviate from those values. This limit on variation keeps parts interchangeable and ensures they function as intended. For example, a hole with a basic diameter of 20.000 mm might have a tolerance of +0.050/−0.000, meaning the actual diameter can range from 20.000 to 20.050 mm. The other terms don’t describe this allowable deviation: color property isn’t about size, a tag is labeling, and a measurement unit is just how you express size.

The main idea here is tolerance. In design and manufacturing, basic dimensions are exact values, and tolerance defines how much a feature is allowed to deviate from those values. This limit on variation keeps parts interchangeable and ensures they function as intended. For example, a hole with a basic diameter of 20.000 mm might have a tolerance of +0.050/−0.000, meaning the actual diameter can range from 20.000 to 20.050 mm. The other terms don’t describe this allowable deviation: color property isn’t about size, a tag is labeling, and a measurement unit is just how you express size.