Blueprint Reading Unit 3

What do visible lines represent in an engineering drawing?

• Outline or visible edges

• Extension lines

• Hidden surfaces

• Dimensions

How are hidden surfaces represented in an engineering drawing?

• Thick lines

• Thin lines

• Dashed lines

• Solid lines

What are extension lines used for in an engineering drawing?

• Extending surfaces without touching the object.

• Showing hidden surfaces

• Indicating centers

• Showing lines of Symmetry

What type of lines are used to show the distance being measured in an engineering drawing?

• Dimension lines

• Leader lines

• Centerlines

• Hidden lines

What do centerlines indicate in an engineering drawing?

• Symmetry

• Hidden surfaces

• Centers

• Dimensions

What do symmetry lines indicate in an engineering drawing?

• Centers

• Dimensions

• Symmetry

• Hidden surfaces

What do break lines represent in an engineering drawing?

• Short breaks

• Hidden surfaces

• Symmetry

• Long breaks

What are phantom lines used for in an engineering drawing?

• Indicating centers

• Showing hidden surfaces

• Showing alternative positions

• Clarifying mechanisms

What is the purpose of using symbols instead of words or notes on an engineering drawing?

• Adding more information

• Overcoming language barriers

• Reducing drafting time

• Increasing clarity

What is the new standard for specifying holes or diameters in an engineering drawing?

• Using abbreviations

• Using symbols

• Using notes

• Using letters