Blueprint Reading and Technical Drawing Flashcards

What does a hidden line (dashed line) represent in a technical drawing?

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

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

On a blueprint, the scale notation '1:2' means which of the following?

Answer: 1 unit on the drawing equals 2 units in real life

A scale of 1:2 means every 1 unit measured on the drawing represents 2 units in actual size, making the drawing half of real size.

What is the primary purpose of a title block on a technical drawing?

Answer: To provide key identification and reference information about the drawing

The title block contains critical reference information such as the drawing number, title, scale, date, drafter's name, and revision level.

What type of view is created by passing an imaginary cutting plane through an object to reveal its internal features?

Answer: Section view

A section view (cross-section) reveals interior details by showing the object as if it were cut along a cutting plane, making hidden internal features visible.

In technical drawing, what does GD&T stand for?

Answer: Geometric Dimensioning and Tolerancing

GD&T (Geometric Dimensioning and Tolerancing) is a system for defining and communicating engineering tolerances and allowable variations in form, fit, and function.

Which line type in technical drawing indicates the axis of symmetry or the center of a circular feature?

Answer: Chain line (alternating long and short dashes)

Centerlines are drawn as chain lines (alternating long and short dashes) and identify axes of symmetry, centers of holes, and paths of motion.

In third-angle projection (used in North America), where is the front view typically located on the drawing sheet?

Answer: Center of the sheet with related views arranged around it

In third-angle projection, the front (principal) view is placed in the center, with the top view above it, the right-side view to the right, and the left-side view to the left.