GMAW Welding

Question 1

What does (gmaw) stand for?

Answer 1

Gas metal are welding

Question 2

What does gmaw-s stand fo?

Answer 2

Short circuit

Question 3

GMAW spray welding is generally not done on materials thinner than

Answer 3

3/8 inch thick

Question 4

What type of power source must be used for pulse welding

Answer 4

Inverter

Question 5

A hissing or whispering sound best describes what type of metal transfer?

Answer 5

Spray

Question 6

The cubic feet per hour for spray or pulse spray is?

Answer 6

30 to 50

Question 7

Which gas produces the deepest penetration?**

Answer 7

CO 2

Question 8

List the five points to consider for proper welding technique?

Answer 8

Electrode extension , Travel angle, work angles, travel speed, electrode angle

Question 9

What four corrective actions will help climate porosity in the weld?

Answer 9

Clean base metal, clean gas flow leads, remove wind, get fresh core wire

Question 10

A buzzing or sharp crackling sounds best describes what type of metal transfer?

Answer 10

Short circuit

Question 11

When doing semiautomatic welding, what two things does the equipment control?

Answer 11

Speed and Heat

Question 12

What machine does MIG use?

Answer 12

Constant voltage (CV)

Question 13

What is used most for GMAW applications, DC reverse polarity or straight polarity?

Answer 13

DC reverse polarity

Question 14

When doing semi-automatic welding what two things does the equipment control

Answer 14

Feed and arc length

Question 15

What are the three types of feed rollers?

Answer 15

Flat , single groove, double groove

Question 16

The four types of drive roll groove shapes?

Answer 16

V grooves, u grooves, knurled v groove, cogged U groove

Question 17

ER70S-6 wire , what is the strength?

Answer 17

70,000 ibs

Question 18

In GMAW and FCAW, how is amperage set?

Answer 18

Wire feed speed