Welder Training & Certification




1. What gas provides the hottest flame when burned with oxygen?

a. Natural gas

b. propane

c. acetylene



2. What flame type has excess oxygen?

a. reducing

b. neutral

c. carburizing

d. oxidizing


3. What is the maximum safe working pressure when using acetylene?

a. 15 lbs

b. 10 lbs

c. 20 lbs

d. 30 lbs


4. Oxygen hoses are

a. blue

b. green

c. red

d. red and green striped


5. Devices that prevent the gases from mixing in the hoses are called

a. back stoppers

b. one way valves

c. reverse flow check valves

d. gas valves


6. The gap created by the cut is called the

a. gap

b. width

c. kerf

d. opening


7. The vertical lines on the face of the cut are called

a. drag lines

b. cutting lines

c. sever lines

d. heat lines


8. Oxyfuel torches can cut

a. carbon steel

b. aluminum

c. copper nickel

d. all of the above


9. The flames used to bring the metal up to cutting temperature are called the

a. warming flames

b. cutting flames

c. preheat flames

d. reducing flames


10. A condition that exists when the flame burns back in the torch is called a

a. burnback

b. explosion

c. reverse flow

d. flashback


11. GMAW uses for shielding, gases that are

a. inert

b. active

c. exotic

d. a and b above


12. GMAW uses the following current



c. AC



13. In GMAW the current is determined by the

a. voltage

b. shielding gas

c. wire feed speed

d. machine type


14. What is not a type of metal transfer?

a. short circuiting

b. spray

c. droplet

d. pulsed


15. What gas would you choose for spray transfer welding?

a. 75% Ar 25% CO2

b. 100% He

c. 98% O2

2% Ar

d. 98% Ar 2% O224


16. What type of transfer requires a special machine?

a. pulsed

b. spray

c. globular

d. short circuiting


17. The welding current is transferred to the wire via the

a. conduit

b. feed rolls

c. contact tip

d. liner


18. What type of metal transfer would produce the least spatter?

a. short circuiting

b. spray

c. droplet

d. globular


19. Short circuiting transfer can be used in what position?

a. vertical down and flat only

b. flat and horizontal only

c. all positions

d. flat only


20. The point where spray metal transfer begins is called the

a. short circuit point

b. spray transfer point

c. upslope point

d. transition current


21. For an E-7018 electrode the 70 stands for the

a. tensile strength times 10,000 lbs

b. flux coating

c. position the electrode can be used in

d. core wire composition


22. The SMAW process uses what type of power supply?

a. constant potential

b. constant voltage

c. high voltage

d. constant current


23. An E-11018 electrode

a. is a low hydrogen electrode

b. has a tensile strength of 110,000 PSI

c. can be used in all positions

d. is all of the above


24. When adjusting a SMAW power supply you set the

a. voltage

b. wire feed speed

c. amperage

d. flow rate


25. Opened containers of low hydrogen electrodes should be stored

a. in a dry storeroom

b. in a refrigerator with a light bulb

c. in a vented electric oven

d. require no special storage


26. An E-7024 electrode can be used in what positions?

a. flat and horizontal only

b. vertical down and flat only

c. all positions

d. flat only


27. Using a side to side motion while welding is called

a. stringing

b. weaving

c. whipping

d. figure eight


28. Filler metal specifications are written by



c. AWS

d. ABS


29. A 308L-16 electrode would be used to weld

a. copper nickel

b. stainless steel

c. carbon steel

d. monel


30. Weld puddle shielding in SMAW is achieved by

a. an auxiliary gas

b. decomposition of the core wire

c. an arc plasma

d. decomposition of the flux coating


31. GTAW uses what type of gases for shielding?

a. active

b. inert

c. a combination of active and inert

d. volatile


32. An EWTh-2 electrode is

 a. 1% thoriatedSkillsUSA Welding Contest

b. 2% thoriated

c. 2% zirconiated

d. striped


33. What current do you use to weld aluminum?




d. AC


34. What flow rate would be proper when using argon shielding gas?

a. 10&endash;20 CFH

b. 40&endash;50 CFH

c. 10&endash;20 lbs

d. 40&endash;50 lbs


35. What current causes the most heat at the electrode?



c. AC



36. The shape of the electrode when using DCEN should be

a. blunt

b. balled

c. tapered

d. squared


37. A red stripe electrode is

a. EWP

b. EWTh-1

c. EWTh-2

d. EWTh-3


38. The recommended tungsten for welding aluminum is

a. EWTh-1

b. EWTh-2

c. EWTh-3

d. EWP


39. High frequency units serve to

a. balance the AC sine wave

b. allow the arc to jump the gap

c. cool the tungsten

d. provide additional amperage


40. Safety considerations must be given when using argon because

a. Argon will displace air

b. Argon is heavier than air

c. Argon does not support life

d. all the above


41. The wasting away of metal due to atmospheric elements is due to

a. crystalline changes

b. corrosion

c. carburization

d. the heat-affected zone (HAZ)


42. The property of metal that resists forces acting to pull it apart is its __________ strength

a. ductility

b. compressive

c. tensile

d. impact


43. The basic element of a welding symbol is the

a. tail

b. arrow

c. reference line

d. joint symbol


44. A nondestructive test method used to detect surface or near surface discontinuities in magnetic materials is

a. penetrant testing

b. magnetic particle testing

c. radiography

d. visual testing


45. A nondestructive test method used to detect discontinuities well below the surface is

a. visual

b. penetrant

c. magnetic particle

d. radiography


46. The failure of a weld bead to fuse to the groove walls or to another bead is called

a. lack of penetration

b. undercut

c. slag entrapment

d. lack of fusion


47. Burning away the base metal at the toe of the weld is called

a. undercut

b. lack of fusion

c. lack of penetration

d. overlap


48. The kind of electricity that reverses the direction of current flow regularly is called

a. pulsed

b. direct

c. alternating0

d. reversed


49. The tendency of the arc to wander away from its path is caused by

a. strong drafts

b. magnetic fields

c. short arcs

d. low currents


50. A groove weld in the overhead position is

a. 1G

b. 2G

c. 3G

d. 4G



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