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Q1. Which of the following gases can be used as shielding gases for GMAW?

a. argon
b. argon-oxygen
c. argon-carbon dioxide
d. all of the above

Q2- Solidification cracking due to improper width-to-depth ratio of the weld bead is a serious problem primarily with which welding process?

a. SMAW
b. GTAW
c. SAW
d. all of the above

Q3- Which of the following types of metal transfer in GMAW provides the lowest amount of heat to the workpiece, and therefore is prone to incomplete fusion?

a. short circuiting
b. spray
c. globular
d. droplet

4. Q4- A green stripe on a tungsten electrode designates:

a. pure tungsten
b. 1 % thoriated tungsten
c. 2% thoriated tungsten
d. none of the above

Q5- Brazing differs from welding in that:

a.no filler metal is used
b.an oxyfuel flame is used
c.the base metal is not melted
d. all of the above

Q6- The code that covers the welding of steel structures is:

a. ASME Section IX
b. ASME B31.3
c. API 1104
d. AWS D1.1

Q7- Which of the followings is a specification covering the requirements for welding electrodes:

a. AWS - D1.X
b. AWS - D14.X
c. ASTM - A53
d. AWS A - 5.1

Q8- UNS refers to:

a. United Nondestructive Society
b. Unified Numbering System
c. Unified National System
d. United National Standards

Q9- What is the pipe welding position where the pipe remains fixed with its axis horizontal, so the welder must weld around the joint?

a. 5G
b. 6G
c. 4G
d. 2G

Q10- For most codes, if a welder continues to use a particular process and procedure, how long does the welder’s qualification remain in effect?

a. indefinitely
b. 6 months
c. 1 year
d. until the welder produces a rejectable weld