Blueprint symbols and crosshatch

Question 1

A thick continuous line outlining the edges or contours of an object

Answer 1

Visible line

Question 2

shows edges, surfaces, and corners that cannot be seen. It is a medium-weight line consisting of short dashes about 1/8″ long with 1/16″ gaps.

Answer 2

Hidden line

Question 3

A very thin long-short-long line.

Used to indicate the centers of holes, arcs, and symmetrical objects

Answer 3

Centerline

Question 4

Line is thin and solid, indicating the size of an object..

Arrowheads at each end

Answer 4

Dimension and extension lines

Arrowheads at each end show where the dimension lines end at the extension lines

Question 5

Short and long break lines do what

Answer 5

Short and long break lines: Break lines remove a section of a drawing for clarity, and shorten objects that are too long to fit on the drawing.