Blueprint Reading Flashcards

A weld symbol with a filled circle at the junction of the reference line and arrow indicates:

Answer: A field weld to be performed on-site

A filled (solid) dot at the tail-arrow junction of a weld symbol indicates a field weld, meaning it is to be made at the installation site rather than in the shop.

On a blueprint, the symbol '⌀' preceding a dimension number indicates:

Answer: A diameter measurement

The ⌀ (phi) symbol indicates that the dimension is a diameter, typically for a cylindrical or circular feature.

What is the function of a 'detail view' on an engineering drawing?

Answer: To show an enlarged view of a small or complex area for clarity

A detail view presents an enlarged version of a small or intricate area that cannot be clearly shown at the drawing's main scale.

In a pneumatic circuit diagram, a rectangle with two triangles pointing inward from each side represents:

Answer: A double-acting cylinder

A double-acting cylinder in pneumatic diagrams is shown as a rectangle with two opposing inward-pointing triangles, representing pressure ports on both ends.

The 'straightness' GD&T control differs from 'flatness' in that straightness:

Answer: Controls a line element or axis, while flatness controls a surface

Straightness controls individual line elements (on a surface) or the central axis of a cylindrical feature, while flatness controls an entire surface.

On a structural steel drawing, the notation 'W12×40' refers to:

Answer: A wide-flange beam 12 inches deep weighing 40 pounds per linear foot

W-shape notation means wide-flange section with nominal depth (12 inches) and weight per foot (40 lb/ft).

When a drawing note states 'REMOVE ALL BURRS AND SHARP EDGES,' this instruction applies to:

Answer: All edges of the finished part unless otherwise specified

General notes like 'remove all burrs and sharp edges' apply globally to the entire part unless specific exceptions are called out.