CPT Blueprint Reading & Technical Drawing

Question 1

On a manufacturing blueprint, what do dashed (hidden) lines represent?

Accepted Answer

Edges or surfaces that exist but cannot be seen from the current view angle

Answer

The centerline of a circular feature

Answer

Dimensions that are optional and not required for production

Answer

Areas where surface finish requirements apply

Question 2

A blueprint dimension reads '2.500 ± 0.005 inches.' What does the ± 0.005 indicate?

Accepted Answer

The acceptable range for that dimension is 2.495 to 2.505 inches

Answer

The part must measure exactly 2.500 inches with no variation allowed

Answer

The measurement tool has an error of 0.005 inches

Answer

The dimension applies to 5 identical features on the part

Question 3

What is the primary purpose of the title block on an engineering drawing?

Accepted Answer

To identify the part name, part number, revision level, scale, and drawing authority

Answer

To provide a decorative border around the drawing

Answer

To list required raw materials and their costs

Answer

To show the bill of materials for the full assembly

Question 4

What does GD&T stand for in engineering drawings?

Accepted Answer

Geometric Dimensioning & Tolerancing

Answer

General Drawing & Tolerancing

Answer

Graduated Design & Testing

Answer

Grid-Based Drafting & Tracing

Question 5

On a blueprint, a centerline (long-short-long dash pattern) is used to indicate:

Accepted Answer

The axis or center of a cylindrical feature such as a hole or shaft

Answer

The cutting plane for a cross-section view

Answer

A surface that requires a special coating

Answer

A dimension that is for reference only and not to be measured

Question 6

A drawing note states 'REMOVE ALL BURRS AND SHARP EDGES.' This is an example of a:

Accepted Answer

General manufacturing note specifying a finishing requirement

Answer

Tolerance callout

Answer

GD&T feature control frame

Answer

Bill of materials entry