Dimensioning Guidelines

What is the purpose of adding dimensions to sketches?

• To communicate measurements and characteristics of a design

• To make the sketch look more complex

• To add color to the design

• To create a 3D model

Answer explanation

Adding dimensions to sketches is essential to communicate measurements and features of a design clearly. This ensures that anyone interpreting the sketch understands the size and details accurately.

What is the first action to take in the sizing process?

• Align the points and edges.

• Choose the best front view.

• Include sufficient information.

• Use standard sizing rules.

Answer explanation

Choosing the best front view is the first step in dimensioning, as it establishes the primary perspective from which all dimensions will be referenced, ensuring clarity and accuracy in the final drawing.

Which of the following is a key principle of dimensioning?

• Place dimensions on hidden lines

• Always use metric units

• Use as many dimensions as possible

• Provide only the necessary dimensions

Answer explanation

The key principle of dimensioning is to provide only necessary dimensions. This ensures clarity and avoids clutter, making it easier to read and interpret the drawing without unnecessary information.

What should you ensure between the object line and the extension line?

• They are touching

• There is a space

• They are parallel

• They are identical

What type of line conventions are used for hidden lines?

• Solid

• Dashed

• Dotted

• Wavy

Which of these is NOT a dimensioning rule?

• always place dimensions inside the shape

• do not give the same dimension twice

• avoid dimensioning to hidden lines

Which of the following is NOT a recommended practice in dimensioning?

• Use consistent units at all times

• Ensure dimensions are legible

• Place dimensions on hidden lines

• Use clear and concise dimensions

Answer explanation

Placing dimensions on hidden lines is not recommended because it can lead to confusion and make the drawing harder to read. Dimensions should be placed clearly on visible lines to ensure they are easily interpreted.

Which of the following options should be avoided when placing dimension lines?

• Crossing dimension lines with each other

• Using a consistent scale for dimension lines

• Aligning dimension lines with object lines

• Placing dimension lines outside the view

Answer explanation

Crossing dimension lines over each other can create confusion and make it difficult to read the drawing. It's important to keep dimension lines clear and organized for accurate interpretation.

Which dimensioning guideline is violated in this image?

• Dimensions should be between views.

• Do not dimension hidden lines.

• • Do not include unnecessary dimensions.

Which dimensioning guideline is violated in this image?

• Dimensions should be between views.

• Do not duplicate dimensions.

• • Do not include unnecessary dimensioning.