CPM Blueprint Reading and Schematics 2

Question 1

On a mechanical drawing, edges that are not visible from the current view are shown with which line type?

Accepted Answer

Short evenly spaced dashes

Answer

Hidden lines are drawn as short, evenly spaced dashes to show edges that cannot be seen in that view.

Question 2

A line made of alternating long and short dashes running through the middle of a shaft most likely represents what?

Accepted Answer

A center line marking the axis of symmetry

Answer

Center lines use alternating long and short dashes to mark axes of symmetry and centers of holes or shafts.

Question 3

In third-angle projection, the standard used on US drawings, where is the top view placed?

Accepted Answer

Directly above the front view

Answer

Third-angle projection places the top view above the front view and the right-side view to its right.

Question 4

A thick line with arrows at each end, drawn across a view, tells the reader what?

Accepted Answer

Where an imaginary cut was made for a section view and which way to look

Answer

A cutting-plane line shows where the section was taken, and its arrows show the viewing direction.

Question 5

A part outline drawn with long dashes separated by pairs of short dashes most likely represents what?

Accepted Answer

An alternate position of a moving part or an adjacent part

Answer

Phantom lines (long, short, short) show alternate positions, repeated detail, or nearby parts.

CPM - Certified Plant Mechanic Practice Test