456A Welding Symbols 2

Question 1

What information is contained in the tail of a welding symbol?

Accepted Answer

Supplementary information such as welding process, procedure specification (WPS) number, or special instructions

Answer

The tail of the welding symbol contains supplementary information that doesn't fit in the standard symbol format. This includes the welding process designation (e.g., SMAW, GMAW), WPS number, NDE requirements, or special instructions. If no supplementary information is needed, the tail may be omitted.

Question 2

How is an intermittent fillet weld indicated on a welding symbol?

Accepted Answer

By specifying the weld length and pitch (centre-to-centre spacing) to the right of the fillet symbol, such as '6-75-150' meaning 6 mm leg, 75 mm long, 150 mm pitch

Answer

Intermittent fillet welds are indicated by placing the weld length and pitch (centre-to-centre spacing) to the right of the fillet weld symbol. For example, '75-150' means 75 mm weld segments spaced 150 mm on centre. Staggered intermittent welds on both sides are shown by offsetting the symbols on the reference line.

Question 3

What does a double-V groove weld symbol look like?

Accepted Answer

V-shaped symbols on both sides of the reference line, indicating the joint is grooved from both sides

Answer

A double-V groove weld is indicated by placing V-groove symbols on both sides of the reference line (one above and one below). This indicates the joint is prepared with a V-groove from both sides, typically used on thicker plates where welding from both sides ensures full penetration and reduces distortion.

Question 4

In Canadian welding standards (CSA W59), what does CJP stand for on a welding symbol or drawing note?

Accepted Answer

Complete Joint Penetration — the weld metal must extend through the full thickness of the joint

Answer

CJP stands for Complete Joint Penetration, meaning the weld must extend through the entire thickness of the base metal at the joint. CJP welds are required for critical structural connections where the full strength of the base metal must be developed across the joint.

Question 5

What does a backing bar symbol look like on a welding symbol?

Accepted Answer

A rectangle placed on the opposite side of the reference line from the groove weld symbol

Answer

A backing bar is indicated by a rectangle placed on the reference line opposite the groove weld symbol. If the backing is to remain in place, the rectangle is filled; if it must be removed after welding, an 'R' is placed inside or near the rectangle. The backing material specification may be noted in the tail.

Red Seal Welder 456A Practice Test

Red Seal Welder 456A Practice Test

456A Welding Symbols 2