Blueprint Reading and Machining Symbols

What does a solid thick line represent in a blueprint?

• Hidden edge

• Visible edge

• Centerline

• Dimension line

Which symbol is used to indicate a diameter in a blueprint?

• Ø

• R

• ⊥

• Δ

In blueprint reading, what does a dashed line typically represent?

• Centerline

• Hidden feature

• Cutting plane

• Dimension line

What is the purpose of a centerline in a blueprint?

• To indicate a hidden feature

• To show the center of circles or symmetrical parts

• To represent a cutting plane

• To indicate a dimension

Which of the following symbols represents a counterbore?

• ⌴

• ⌵

• ⌶

• ⌷

• Parallelism

• Perpendicularity

• Angularity

• Concentricity

• Perpendicularity

• Parallelism

• Symmetry

• Flatness

What does a thin solid line with arrowheads at both ends represent in a blueprint?

• Dimension line

• Extension line

• Leader line

• Cutting plane line

Which symbol is used to indicate a radius in a blueprint?

• Ø

• R

• ⊥

• Δ

• Change in dimension

• Surface finish

• Angularity

• Concentricity