Technical Drawing Flashcards

What does a hidden line represent in a technical drawing?

Answer: An edge or surface not visible from the current view

Hidden lines (dashed lines) represent edges or surfaces that exist but cannot be seen from the current viewing direction.

Which type of section view is used when only one half of a symmetrical part needs to be shown in section?

Answer: Half section

A half section cuts away one quarter of a symmetrical object, showing the interior on one half and the exterior on the other.

In GD&T, what does the flatness symbol control?

Answer: How flat a surface is regardless of any datum

Flatness controls all points of a surface to lie within two parallel planes and requires no datum reference.

What is the purpose of a revision block on a technical drawing?

Answer: To record changes made to the drawing after original release

The revision block documents each change to a drawing, including the revision letter, description, date, and approval.

A leader line on a technical drawing is used to:

Answer: Point from a note or symbol to the feature it describes

Leader lines connect notes, part numbers, or symbols to the specific feature or area they reference on the drawing.

When a dimension is shown as '2X Ø.500', what does '2X' indicate?

Answer: The feature appears twice and both must be the same size

The '2X' prefix means the dimension applies to two identical features, indicating both must conform to the specified size.

Which projection method places the front view in the center, the top view above, and the right-side view to the left of the front view?

Answer: First-angle (European) projection

First-angle projection, used in Europe and many other countries, projects views as if the object is between the viewer and the projection plane.