Weld Defects

Filler metals are classified by: a. American Welding Society. b. American Society for Testing and Materials. c. American Society for Nondestructive Testing. d. Society of Automotive Engineers.

a. American Welding Society.

What is the most common cause for weld metal property defects? a. The incorrect filler material. b. Incorrect welding technique. c. Welding overhead. d. All of the above.

a. The incorrect filler material.

To prevent incomplete penetration, insure enough heat is being used on a properly designed joint and: a. The welder has adequate skills to produce the desired weld. b. The welding is being done in the flat position. c. The base metal thickness is less than 1/2-inch. d. The shielded metal arc welding process is used.

a. The welder has adequate skills to produce the desired weld.

Slag inclusions are most commonly caused by: a. Welding over the slag of the previous weld. b. Using the incorrect size of filler material. c. Using a nonconsumable arc welding process. d. Using the wrong shielding gas.

a. Welding over the slag of the previous weld.

The ability of a material to stretch, bend, or twist without cracking or breaking refers to what property? a. Tensile strength. b. Ductility. c. Corrosion resistance. d. Impact strength.

b. Ductility.

If a root opening is too tight or groove angles not wide enough, the weld metal may be restricted causing: a. Porosity. b. Incomplete penetration. c. Toe cracks. d. Excessive root reinforcement.

b. Incomplete penetration.

Cluster porosity is likely to result from: a. Improper selection of filler materials. b. Periodic loss of the shielding gas. c. Using inert shielding gases. d. Using a shielding gas which is not welding grade.

b. Periodic loss of the shielding gas.

Which of the following does not apply to hot cracking? a. Base metal composition. b. Poor electrode angles and technique. c. Poor bead shape or insufficient size. d. Poor crater filling.

b. Poor electrode angles and technique.

Which of the following is not a responsibility of the welding inspector? a. Read and understand blueprints and symbols. b. Supervise the welder. c. Use documented workmanship standards provided by design. d. Understand joint design detail.

b. Supervise the welder.

What is the distinguishing difference between a discontinuity and a defect? a. A defect is acceptable. b. A discontinuity is excessive. c. A discontinuity is acceptable and a defect isn't. d. A defect is acceptable and a discontinuity isn't.

c. A discontinuity is acceptable and a defect isn't.

Which of the following procedure variables does not contribute to undercut? a. Amperage. b. Travel speed. c. Metal thickness. d. Bead sequencing.

c. Metal thickness.

Crater cracking can be prevented or minimized by insuring: a. The crater is left unfilled. b. The crater is in the middle of the joint. c. The crater is filled to bead height. d. The crater is at the end of the joint.

c. The crater is filled to bead height.

Arc strikes: a. Do not cause weld defects and can be ignored. b. Require surface grinding. c. Usually require grinding to remove reheated base metal. d. Always lead to serious problems.

c. Usually require grinding to remove reheated base metal.

Overlap is a profile discontinuity which can occur when the: a. Welding heat input is controlled. b. Base material being welded is properly cleaned. c. Weld puddle is too large. d. Shielding gas is inadequate.

c. Weld puddle is too large.

What characteristic is always common to lamination, lamellar tears, and seams and laps? a. All are found in the surface of welds. b. All are caused by welding. c. All run parallel to each other. d. All originate in the base metal, not the weld.

d. All originate in the base metal, not the weld.

Tungsten inclusions can appear in a weld: a. Scattered in fine particles. b. As a large broken tip. c. As a property of the weld. d. Both A and B.

d. Both A and B.

Which of the following need not be checked to prevent porosity? a. Type of shielding gas and flow rate. b. Base metal cleanliness. c. Storage of filler metals. d. Filler metal I base metal match.

d. Filler metal I base metal match.

Poor joint design and poor edge preparation are the two common causes of: a. Incorrect weld color. b. Lamellar tears. c. Tungsten inclusions. d. Incomplete fusion.

d. Incomplete fusion.

Which of the following need not be checked if excessive weld size is a common defect? a. The weld symbol on the blueprint. b. Process and electrode to be used. c. Joint alignment and fit-up. d. Lack of filler metals available

d. Lack of filler metals available

With the E7018 electrode, the 70 indicates what? a. Position capabilities. b. Type of flux coating. c. Recommended current level. d. Minimum tensile of weld deposit.

d. Minimum tensile of weld deposit.

On a groove weld with a root opening, excessive root reinforcement is most probable if the: a. Root opening is too tight. b. Travel speed for the root pass is too fast. c. Welding current set too low. d. Root opening is too wide.

d. Root opening is too wide.

A mechanical property of metals which is measurable in p.s.i. and is the greatest normal load per unit area a material can withstand without failing is: a. Density. b. Ductility. c. Yield strength. d. Tensile strength.

d. Tensile strength.

In a multipass weld the temperature (minimum or maximum as specified) of the deposited weld metal before the next pass is started is referred to as: a. The postheat temperature. b. The temperature of the arc. c. The welding control temperature. d. The interpass temperature.

d. The interpass temperature.

Distortion and/or warpage in a weldment is directly related to: a. The position in which welding is done. b. The size of the weldment. c. The type of filler materials being used. d. The non-uniform heating and cooling, and the partial restraint of the weldment during welding.

d. The non-uniform heating and cooling, and the partial restraint of the weldment during welding.