Deck 30: Testing and Inspecting Welds

Question 1

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

Answer 1

True

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.

Answer 2

True

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

Answer 3

D

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.

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

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

Question 7

____ inspection is a method for detecting flaws inside weldments.

A) Magnetic particle
B) Penetrant
C) Visual
D) Radiographic

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

Question 9

The majority of welds receive only visual inspection.

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

Question 11

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

A) Clustered
B) Linear
C) Piping
D) Uniformly scattered

Question 12

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

Question 13

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

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

Question 15

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

A) Visual
B) Magnetic particle
C) Penetrant
D) Radiographic

Question 16

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

Question 17

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

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.

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

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.

Question 21

____________________ methods, except for hydrostatic testing, result in the product being destroyed.

Question 22

The difference between what is acceptable, fit for service, and perfection is known as ____________________.

Question 23

A lack of fusion between the filler metal and previously deposited weld metal is called ____________________.

Question 24

A cylindrical porosity is called a(n) ____________________, and it is the most likely type of porosity to reach the weld surface and be seen.

Question 25

____________________ inspection uses finely divided ferromagnetic particles (powder) to indicate defects open to the surface or just below the surface on magnetic materials.