Center Lines

What is the purpose of center lines in an object?

• To show the axis or center of symmetry

• To indicate the object's color

• To measure the object's weight

• To display the object's material.

Center lines are usually drawn as alternating long and short ______.

Which of the following is a use of center lines?

• Marking centers of circles and holes

• Indicating the edge of a square

• Showing the height of a triangle

• Measuring the length of a rectangle.

Center lines are used to show _____ in round parts.

What is the recommended length for a long dash when drawing center lines?

• 1/2 inch (12mm)

• 3/4 inch (19mm)

• 1 inch (25mm)

• 1/4 inch (6mm)

When drawing center lines, the short dash should be about ___ inch (3mm).

• 1/4

• 1/2

• 1/8

• 3/4

What is the recommended extension for center lines beyond a feature?

• Just a bit

• 1 inch

• 2 inches

• 3 inches

Center lines should not be extended too far. What is the usual recommended extension past the edge?

• 1/8 to 1/4 inch

• 1/4 to 1/2 inch

• 1/2 to 1 inch

• 1 to 2 inches

For circles, center lines should be extended slightly beyond the ____.

When dealing with patterns, center lines should extend past the ____ and ____ feature.

• first and last

• top and bottom

• left and right

• middle and end