Dimensioning Principles Worksheet
A Grade 12 math worksheet on dimensioning principles, including geometric dimensioning and tolerancing (GD&T) concepts.
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Dimensioning Principles
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Read each question carefully and provide the best answer. Show all your work for short answer questions.
1. Which of the following is NOT a fundamental rule of dimensioning?
Dimension lines should be drawn solid and unbroken.
Dimensions should be placed directly on the view whenever possible.
Each feature needs to be dimensioned only once.
Dimensions should be given from a common datum or baseline.
2. What does GD&T primarily address?
The overall aesthetic design of a part.
The geometric characteristics and allowable variations of parts.
The material properties of a component.
The assembly process of multiple components.
3. A(n) is a specified allowable deviation from a nominal dimension.
4. The symbol for perpendicularity in GD&T is a(n) .
5. Consider a rectangular block with a length of 100mm, a width of 50mm, and a height of 25mm. Draw a simple 3D isometric view of this block and dimension its length and height.
6. Explain the difference between basic dimensions and reference dimensions in technical drawings.
7. A feature control frame is used to specify geometric tolerances.
True
False
8. The least material condition (LMC) refers to the condition where a feature contains the maximum amount of material within its tolerance limits.
True
False
Match each GD&T symbol with its corresponding geometric characteristic.
9. Position
a. ⌖
10. Flatness
b. —
11. Perpendicularity
c. ⊥
12. A cylindrical shaft has a nominal diameter of 25 mm with a tolerance of ±0.02 mm. What are the upper and lower limits of the shaft's diameter? Draw a simple diagram of the shaft and indicate these dimensions.