NOCTI - National Occupational Competency Testing Institute Reading and Interpreting Blueprints Questions and Answers

Question 1

On an engineering drawing, what type of line is used to represent edges or features of an object that are not visible in the current view?

Accepted Answer

Hidden Line

Answer

Object Line

Answer

Center Line

Answer

Phantom Line

Question 2

A machinist is preparing to manufacture a single component detailed on a blueprint. To verify the general dimensional tolerances that apply to all features unless otherwise specified, where is the FIRST place they should look?

Accepted Answer

Title Block

Answer

Revision History Block

Answer

Bill of Materials

Answer

Flag notes in the field of the drawing

Question 3

In a standard third-angle orthographic projection, which is common in the United States, if you are looking at the front view, how is the right-side view oriented?

Accepted Answer

To the right of the front view

Answer

Directly above the front view

Answer

To the left of the front view

Answer

Directly below the front view

Question 4

A feature on a drawing is specified with the symbol 'Ø'. What does this symbol indicate?

Accepted Answer

Diameter

Answer

Radius

Answer

Counterbore

Answer

Depth

Question 5

A drawing is created with a scale of 2:1. A feature on the drawing measures 50mm. What is the actual size of the feature on the manufactured part?

Accepted Answer

25mm

Answer

100mm

Answer

50mm

Answer

2.5mm

Question 6

What is the primary purpose of a sectional view on a blueprint?

Accepted Answer

To show the internal features of a part more clearly

Answer

To provide a three-dimensional representation of the part

Answer

To show the part at a larger scale for clarity

Answer

To list all the components used in an assembly