Engineering Drawing Standards

Front

What is the purpose of engineering drawing standards?

Back

To ensure drawings communicate intentions clearly and unambiguously, as they are sometimes part of legal contracts.

Front

What information should an engineering drawing provide besides shape?

Back

Dimensions, tolerances (allowed variations), material used, and surface finish.

Front

How are visible and hidden parts of an object represented in line styles?

Back

Solid lines show visible parts, while dashed lines represent hidden parts.

Front

What are the two main types of orthographic projections used in engineering drawings?

Back

First-angle projection and third-angle projection.

Front

What font style is used for text in technical drawings?

Back

An uppercase sans-serif font is used for clarity.

Front

How should dimensions for a diameter and radius be indicated?

Back

A diameter is marked with the symbol Ø and a radius with the letter "R".

Front

What is orthographic projection used for in engineering drawings?

Back

To show an object from different sides, such as the front, top, bottom, left, right, and back.

Front

How does first-angle projection differ from third-angle projection in layout?

Back

In first-angle projection, the right view appears on the left of the front view; in third-angle projection, the right view is on the right.

Front

What is an isometric view, and why is it used?

Back

It's a 3D view looking at a corner of the object, providing a more complete perspective by setting base angles at 30°.

Front

How are dimetric and trimetric views different from isometric views?

Back

They differ in the angles of projection; dimetric has equal base angles (not 30°), while trimetric uses unequal angles.