Question 1

Unless care is taken in reading radiographs, the presence of slag inclusions can be interpreted as other defects.

Accepted Answer

Radiographs can sometimes make slag inclusions look like other types of defects, such as porosity or cracks, if not carefully examined.

Question 2

A discontinuity becomes a defect when the discontinuity becomes so large or when there are so many small discontinuities that the weld is not acceptable under the standards for the code for that product.

Accepted Answer

This is true. Defects are identified when a discontinuity exceeds the allowable limits set by the applicable code or standard.

Question 3

____ occurs when the depth that the weld penetrates the joint is less than that needed to fuse through the plate or into the preceding weld.
A) Inclusions
B) Porosity
C) Incomplete fusions
D) Inadequate joint penetration

Accepted Answer

Inadequate joint penetration occurs when the weld does not penetrate deeply enough into the joint to ensure a strong bond through the entire thickness of the material being welded. This can lead to a weaker weld that may not withstand the intended loads or stresses.

Question 4

To prevent undercutting, you can weld in the flat position by using multiple instead of single passes, change the shield gas, and improve manipulative techniques to fill the removed base metal along the toe of the weld bead.

Accepted Answer

Welding in the flat position using multiple passes, changing the shield gas, and improving manipulative techniques can all help to prevent undercutting along the toe of the weld bead.

Question 5

____ is the result of the arc force removing metal from a joint face that is not replaced by weld metal.
A) Crater crack
B) Incomplete fusion
C) Undercut
D) Overlap

Accepted Answer

Undercut is a defect that occurs when the arc force removes metal from the joint face, and this metal is not replaced by weld metal, leading to a groove along the edge of the weld.

Question 6

____ results from gas that was dissolved in the molten weld pool, forming bubbles that are trapped as the metal cools to become solid.
A) Inclusions
B) Porosity
C) Undercutting
D) Incomplete fusion

Accepted Answer

Porosity results from gas that was dissolved in the molten weld pool, forming bubbles that are trapped as the metal cools to become solid. Inclusions are foreign substances that are trapped in the weld, undercutting is a groove or notch that is created along the weld joint, and incomplete fusion is a lack of complete melting and joining of the weld.

Question 7

____ inspection is a method for detecting flaws inside weldments.
A) Magnetic particle
B) Penetrant
C) Visual
D) Radiographic

Accepted Answer

Radiographic inspection, also known as X-ray inspection, is the most appropriate method for detecting flaws inside weldments. It involves the use of X-rays or gamma rays to create an image of the weldment on a film or digital detector. This method is particularly effective for detecting subsurface discontinuities that may not be visible to the naked eye. Magnetic particle, penetrant, and visual inspection methods are more suitable for detecting surface defects.

Question 8

One common test used to determine the impact capability of a weld is the ____ test in which a notched specimen is struck by an anvil mounted on a pendulum.
A) Izod
B) Charpy
C) Fillet weld break
D) Free-bend

Accepted Answer

The answer of One common test used to determine the...

Question 9

The majority of welds receive only visual inspection.

Accepted Answer

The majority of welds only receive visual inspection, but some may also require non-destructive testing methods such as x-ray or ultrasonic testing depending on the specific application and desired level of quality control.

Question 10

____ occurs in fusion welds when weld deposits are larger than the joint is conditioned to accept.
A) Overlap
B) Inclusion
C) Incomplete fusion
D) Arc strike

Accepted Answer

Overlap occurs when weld deposits extend beyond the edges of the joint or overlap with previous weld passes. Inclusions refer to foreign objects trapped in the weld, while incomplete fusion occurs when the weld metal and the base metal fail to fuse together properly. Arc strike refers to a welding defect caused by an arc striking a surface outside of the weld area.

Question 11

____ porosity is most often caused by improper starting and stopping techniques.
A) Clustered
B) Linear
C) Piping
D) Uniformly scattered

Accepted Answer

The answer of ____ porosity is most often caused by...

Question 12

Although not visible, the development of inclusions can be expected if prior welds were improperly cleaned or had a poor contour.

Accepted Answer

Inclusions can develop if prior welds were improperly cleaned or had a poor contour which can lead to contamination and discontinuities in the subsequent welds.

Question 13

Tensile testing is used to determine how well a weld can resist repeated fluctuating stresses or cyclic loading.

Accepted Answer

Tensile testing is used to determine the ultimate tensile strength and elongation of a material, not its ability to resist cyclic loading. For cyclic loading, fatigue testing is typically used.

Question 14

____ on a groove weld appears when the weld metal deposited is inadequate to bring the weld's face or root surfaces to a level equal to that of the original plane or plate surface.
A) Overlap
B) Underfill
C) Undercut
D) Inclusion

Accepted Answer

Underfill occurs when the weld metal does not fully fill the groove and as a result, the weld face or root surfaces are not at the same level as the original plane or plate surface. This can lead to weaker joints and the potential for increased porosity and cracking in the weld.

Question 15

____ inspection is used to locate minute surface cracks and porosity.
A) Visual
B) Magnetic particle
C) Penetrant
D) Radiographic

Accepted Answer

Penetrant inspection is specifically designed to detect minute surface cracks and porosity. Visual inspection may not be sufficient to detect these small defects, and magnetic particle and radiographic inspections are better suited for detecting subsurface defects.

Question 16

Many acceptable products may have welds that contain defects. But no products may have welds that contain discontinuities.

Accepted Answer

This statement is incorrect. A discontinuity is any interruption or break in the continuity of a weld. Defects are a type of discontinuity. Therefore, a product may have welds that contain defects but should not have welds that contain unacceptable discontinuities. Welding codes and standards provide acceptable levels of defects based on the type and purpose of the weld.

Question 17

Lamellar tears differ from lamination because they are more extensive and involve thicker layers of nonmetallic contaminants.

Accepted Answer

Lamellar tears involve thinner layers of nonmetallic contaminants compared to lamination, but they are more extensive and can span across the thickness of the material. Lamination, on the other hand, is the separation of the material into layers due to improper bonding or rolling during manufacturing.

Question 18

The three methods of testing welded butt joints are (1) the nick-break test, (2) the guided-bend test, and (3) the free-bend test.

Accepted Answer

This statement is true. The three methods of testing welded butt joints are the nick-break test, the guided-bend test, and the free-bend test.

Question 19

____ is the lack of coalescence between the molten filler metal and previously deposited filler metal and/or the base metal.
A) Inclusion
B) Crater crack
C) Inadequate joint penetration
D) Incomplete fusion

Accepted Answer

Incomplete fusion refers to the lack of coalescence between the molten filler metal and previously deposited filler metal and/or the base metal.

Question 20

Ultrasonic inspection (UT) is a nondestructive test. This method is based upon magnetic induction in which a magnetic field induces eddy currents within the material being tested.

Accepted Answer

The statement describes magnetic particle inspection (MPI), not ultrasonic inspection. Ultrasonic inspection uses sound waves to detect internal flaws in materials.

Quiz 30: Testing and Inspecting Welds

Unless care is taken in reading radiographs, the presence of slag inclusions can be interpreted as other defects.

A discontinuity becomes a defect when the discontinuity becomes so large or when there are so many small discontinuities that the weld is not acceptable under the standards for the code for that product.

____ occurs when the depth that the weld penetrates the joint is less than that needed to fuse through the plate or into the preceding weld.

To prevent undercutting, you can weld in the flat position by using multiple instead of single passes, change the shield gas, and improve manipulative techniques to fill the removed base metal along the toe of the weld bead.

____ is the result of the arc force removing metal from a joint face that is not replaced by weld metal.

____ results from gas that was dissolved in the molten weld pool, forming bubbles that are trapped as the metal cools to become solid.

____ inspection is a method for detecting flaws inside weldments.

One common test used to determine the impact capability of a weld is the ____ test in which a notched specimen is struck by an anvil mounted on a pendulum.

The majority of welds receive only visual inspection.

____ occurs in fusion welds when weld deposits are larger than the joint is conditioned to accept.

____ porosity is most often caused by improper starting and stopping techniques.

Although not visible, the development of inclusions can be expected if prior welds were improperly cleaned or had a poor contour.

Tensile testing is used to determine how well a weld can resist repeated fluctuating stresses or cyclic loading.

____ on a groove weld appears when the weld metal deposited is inadequate to bring the weld's face or root surfaces to a level equal to that of the original plane or plate surface.

____ inspection is used to locate minute surface cracks and porosity.

Many acceptable products may have welds that contain defects. But no products may have welds that contain discontinuities.

Lamellar tears differ from lamination because they are more extensive and involve thicker layers of nonmetallic contaminants.

The three methods of testing welded butt joints are (1) the nick-break test, (2) the guided-bend test, and (3) the free-bend test.

____ is the lack of coalescence between the molten filler metal and previously deposited filler metal and/or the base metal.

Ultrasonic inspection (UT) is a nondestructive test. This method is based upon magnetic induction in which a magnetic field induces eddy currents within the material being tested.