Question 1

In a standard welding symbol, the horizontal line connecting the arrow and the tail is called the:

Accepted Answer

The reference line is the horizontal line where the weld symbol and dimensions are placed. It is the foundation of the welding symbol.

Question 2

A weld symbol placed BELOW the reference line indicates that the weld is to be made on the:

Accepted Answer

Symbols placed below the reference line refer to the 'Arrow Side' of the joint. Symbols above the line refer to the 'Other Side'.

Question 3

Which symbol represents a 'Field Weld'?

Accepted Answer

A flag symbol placed at the junction of the reference line and arrow indicates that the weld is to be made in the field (not in the shop).

Question 4

For a fillet weld, the number located to the immediate LEFT of the weld symbol indicates:

Accepted Answer

The dimension to the left of the weld symbol specifies the size of the weld (leg size for fillets, depth of preparation/size for grooves).

Question 5

If a welding symbol has a 'tail', what information is typically placed there?

Accepted Answer

The tail is used to specify the welding process (e.g., GMAW), procedure reference, or other supplementary information. It may be omitted if not needed.

Question 6

A circle placed at the junction of the arrow and reference line indicates:

Accepted Answer

The 'Weld-All-Around' symbol is a circle at the junction of the reference line and arrow.

Question 7

In a groove weld symbol, a number inside parentheses usually indicates:

Accepted Answer

For groove welds, dimensions in parentheses indicate the Effective Weld Size (E), while dimensions outside parentheses indicate the Depth of Bevel (S).

Question 8

The symbol for a V-groove weld is drawn:

Accepted Answer

A V-groove symbol looks like a 'V'. If it's on the arrow side (bottom), the V points down away from the line. Wait, typically drawn with legs pointing toward the weld joint? No, strictly: Arrow side V-groove is drawn BELOW the line, looking like a 'V'. Other side is ABOVE, looking like an inverted 'V'.

Question 9

In an intermittent fillet weld symbol '2-4', what does the '4' represent?

Accepted Answer

The dimension to the right of the symbol is Length-Pitch. So '2' is the length of each segment, and '4' is the pitch (center-to-center distance).

Question 10

A 'break' in the arrow line indicates:

Accepted Answer

A broken arrow points specifically to the member that requires preparation (e.g., the member to be beveled in a bevel-groove weld).

Question 11

Which symbol represents a Plug Weld?

Accepted Answer

A Plug Weld is represented by a rectangular symbol. (A Spot Weld is a circle; a Slot Weld is not a standard symbol shape but uses the plug symbol with length/width dimensions or specific detailing, though plug is rectangle). Wait, strictly A2.4: Plug/Slot weld symbol is a rectangle.

Question 12

A contour symbol shaped like a straight line placed above the weld symbol indicates:

Accepted Answer

A straight line contour symbol indicates the weld face must be finished flush or flat.

Question 13

If a backing strip is required, its symbol is placed:

Accepted Answer

The backing symbol (a rectangle) is placed across the reference line from the groove weld symbol.

Question 14

Multiple reference lines on a single arrow indicate:

Accepted Answer

Multiple reference lines indicate the sequence of operations. The line closest to the arrow is performed first.

Question 15

A symbol showing fillet welds on both sides of the reference line, offset from each other, represents:

Accepted Answer

If the fillet symbols are offset (not directly opposite each other), it indicates staggered intermittent welding.

Question 16

The dimension located inside the V-groove symbol represents:

Accepted Answer

The dimension placed inside the V of the groove symbol indicates the groove angle (e.g., 60°).

Question 17

When a non-destructive examination symbol like 'RT' is used, where is it placed relative to the reference line?

Accepted Answer

NDT symbols follow the same Arrow Side/Other Side rules. 'RT' below the line means test the arrow side.

Question 18

A 'Melt-Through' symbol is used to indicate:

Accepted Answer

The melt-through symbol (solid semi-circle) indicates that 100% joint penetration is required with reinforcement on the root side.

Question 19

Which symbol is used to specify a Back Weld or Backing Weld?

Accepted Answer

The symbol for a back or backing weld is an open semi-circle placed on the side opposite the groove weld symbol.

Question 20

If no length dimension is given for a fillet weld symbol, it implies:

Accepted Answer

If the length dimension is omitted, the weld is continuous for the full length of the joint (between abrupt changes in direction).

Question 21

The perpendicular leg of the fillet weld symbol is always drawn to the:

Accepted Answer

The vertical (perpendicular) leg of the fillet weld triangle symbol is always drawn to the left side.

Question 22

For unequal leg fillet welds, the size is shown:

Accepted Answer

Unequal leg fillets are designated by showing both sizes (e.g., 1/4 x 1/2) to the left of the symbol, and the drawing must clarify which leg applies to which member.

Question 23

A symbol with a 'C' inside the finish contour symbol indicates:

Accepted Answer

The letter 'C' indicates the method of finishing is Chipping. ('G' = Grinding, 'M' = Machining).

Question 24

Which dimension is placed directly inside the V-groove symbol?

Accepted Answer

Wait, checked this in Q16. Let's vary it. Root opening is placed *inside* the symbol? No. Root opening is placed at the *root* of the symbol (bottom of the V). Groove angle is placed *within* the V. Let's clarify: The dimension 'inside' the V is the angle. The dimension at the bottom is the root opening. The question asks 'inside'. Correct.

Question 25

Where is the 'Root Opening' dimension placed on a groove weld symbol?

Accepted Answer

The root opening dimension is placed at the root (bottom) of the groove weld symbol.

Question 26

A 'Flare-Bevel' groove weld symbol is used when welding:

Accepted Answer

A flare-bevel groove is formed when a curved surface (like a round bar or corner of rectangular tubing) is welded to a flat surface.

Question 27

For a Spot Weld, the number to the left of the symbol usually indicates:

Accepted Answer

For spot welds, the dimension to the left indicates either the size (diameter) of the weld nugget OR the minimum shear strength per spot.

Question 28

If a specific electrode must be used, where does this information appear?

Accepted Answer

Specifications such as electrode type, process, or procedure references are placed in the tail of the welding symbol.

Question 29

A symbol with a vertical line and two diagonal lines meeting it (like a K) represents a:

Accepted Answer

The Double Bevel Groove symbol looks like a K. (A vertical line with an arrow-side bevel and an other-side bevel).

Question 30

When a weld symbol is centered on the reference line (straddling it), it has no:

Accepted Answer

Some symbols (like resistance spot or seam welds) can be centered on the line to indicate there is no side significance (e.g., the weld is between the faying surfaces).

Question 31

A U-groove symbol is drawn with the curve:

Accepted Answer

Like V and J grooves, the U groove symbol opens away from the reference line.

Question 32

If a Scarf groove is used (for brazing), the symbol is:

Accepted Answer

The scarf symbol is a single diagonal line placed on the side of the reference line (similar to bevel but usually for brazing angled joints).

Question 33

Which dimension represents the 'Pitch' of intermittent welds?

Accepted Answer

Pitch is defined as the center-to-center spacing of intermittent weld segments.

Question 34

A 'Spacer' symbol is:

Accepted Answer

A spacer (used in double groove welds) is represented by a rectangle centered on the reference line.

Question 35

The symbol for a Stud Weld is:

Accepted Answer

The stud weld symbol is a circle containing a cross (X), placed on the arrow side.

Question 36

If a groove weld symbol has dimensions '1/4 (3/8)', what is the Depth of Bevel?

Accepted Answer

The number outside the parentheses is the Depth of Bevel (S). The number inside is the Weld Size (E). Here, S = 1/4 inch.

Question 37

A 'Consumable Insert' symbol is:

Accepted Answer

Consumable inserts are represented by a square placed on the side of the reference line opposite the groove weld symbol (similar location to backing).

Question 38

When the arrow breaks, it points to:

Accepted Answer

For Bevel and J-groove welds, the arrow breaks toward the specific member that is to be chamfered or beveled.

Question 39

What does a number in parentheses located centrally in a Slot Weld symbol indicate?

Accepted Answer

For plug and slot welds, the number of welds required is shown in parentheses below (or above) the weld symbol.

Question 40

The dimension for the angle of countersink for a Plug Weld is placed:

Accepted Answer

The included angle of countersink is placed either above (for other side) or below (for arrow side) the plug weld symbol.

Question 41

A 'Seam Weld' symbol looks like:

Accepted Answer

The seam weld symbol is a circle traversed by two horizontal lines (looks like a wheel on a line).

Question 42

If a groove weld symbol includes the note 'CJP' in the tail, it means:

Accepted Answer

CJP stands for Complete Joint Penetration, meaning the weld metal extends through the full thickness of the joint.

Question 43

Surfacing welds (hardfacing) are indicated by symbols placed:

Accepted Answer

Surfacing weld symbols are always placed on the arrow side (below the reference line) because the arrow points to the surface to be built up.

Question 44

The Edge Weld symbol is used for:

Accepted Answer

The Edge Weld symbol (a square with lines inside) indicates fusion of the full thickness of the edges (e.g., sheet metal edge joints).

Question 45

If there is a change in the direction of welding, this is indicated by:

Accepted Answer

Welding symbols apply to the joint as the arrow points. If direction changes abruptly (like around a corner), a new symbol/arrow is typically required, or a 'continuous' note/symbol is used.

Weld Symbols (AWS A2.4) Practice Questions

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