AWS Blueprint Reading & Symbols 5 — Questions and Answers
Question 1: What does a melt-through symbol look like on an AWS welding symbol?
- A filled (solid) circle on the opposite side of the reference line (Correct answer)
- A square placed above the reference line
- A triangle pointing downward
- A dashed line below the weld symbol
Correct answer: A filled (solid) circle on the opposite side of the reference line
The melt-through symbol is a filled (solid black) circle placed on the opposite side of the reference line from the weld symbol.
Question 2: On a blueprint, an isometric view is primarily used to:
- Show a 3D representation of a part without true perspective distortion (Correct answer)
- Show the cross-section of a weld joint
- Display only the front and side views simultaneously
- Indicate the assembly sequence of components
Correct answer: Show a 3D representation of a part without true perspective distortion
Isometric drawings present a three-dimensional appearance using 30° angles from horizontal, making spatial relationships clear.
Question 3: Which AWS welding symbol element specifies the contour to which a weld face should be finished?
- A contour symbol (flat, convex, or concave) placed above or below the weld symbol (Correct answer)
- A number in the tail of the reference line
- A circle at the arrow end
- A flag at the reference line junction
Correct answer: A contour symbol (flat, convex, or concave) placed above or below the weld symbol
Contour symbols — flat (straight line), convex (arc up), or concave (arc down) — are placed on the weld symbol to specify the final weld face shape.
Question 4: On a multi-view orthographic drawing, the right-side view is projected from which view?
- Front view (Correct answer)
- Top view
- Bottom view
- Rear view
Correct answer: Front view
In standard third-angle projection (used in the US), the right-side view is projected from the right side of the front view.
Question 5: A welding symbol has a 'C' in the tail. What does this signify?
- A specific welding procedure or specification code is referenced (Correct answer)
- Convex contour finish
- Complete joint penetration required
- Copper backing is used
Correct answer: A specific welding procedure or specification code is referenced
Information in the tail of the welding symbol refers to a specification, process, or procedure — such as a WPS code.
Question 6: What does a break (gap) in an arrow line on a welding symbol indicate?
- The arrow points to the member that receives the prepared (grooved) side of the joint (Correct answer)
- The weld is intermittent at that location
- A second weld pass is required
- The weld is to be made from both sides
Correct answer: The arrow points to the member that receives the prepared (grooved) side of the joint
A broken arrow line indicates that the arrow points specifically to the member that has the groove preparation (the beveled side).
Question 7: On an engineering drawing, what does a section view reveal that a regular orthographic view does not?
- Internal features and cross-sectional shapes of a part (Correct answer)
- The true length of slanted edges
- The overall outside dimensions of the assembly
- Weld joint location from a 3D perspective
Correct answer: Internal features and cross-sectional shapes of a part
A section view cuts through a part to expose internal geometry, showing features like holes, grooves, or wall thickness that are hidden in regular views.
AWS Blueprint Reading & Symbols 5
What does a melt-through symbol look like on an AWS welding symbol?