Test your basic knowledge |

Gas Metal Arc Welding

Instructions:

Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can study here.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.

1. What wire are knurled drive rolls most commonly used on?
Generally not as accurate
National Electrical Manufactures Association
Flux cored wires
Increasing inductance increases puddle fluidity - improves penatration - makes the bead flatter and smoother - and reduces spatter. To much inductance though will create erratic starts

2. What is the maximum distance that hard wire can be successfully pushed?
Power source - wire feeder - welding gun - Spooled filler wire - Shielding gas - and a ground
15 feet (4.5 meters)
To prevent leakage - Carbon Dioxide (CO2)
Short- circuiting transfer - Globular transfer - Spray transfer

3. List several industries that would use GMAW
Flux cored wires
Dry ice can form within the flow control openings and cause blockage of shielding gas
Gives arc voltage values to the control system of the feeder
Pressure vessels and the piping industry

4. What is the reason glass 'tube' type flowmeters must have the tube mounted truly vertical?
Wire feeds smoothly (yet will slip should a problem occur in the gun)
...
Motor driven generators - Transformer rectifiers - and Inverter designs
The Arc voltage

5. What does the abbreviation NEMA stand for?
Power source - wire feeder - welding gun - Spooled filler wire - Shielding gas - and a ground
Welding process that joins metals by heating them with an electric arc
Wire feed speed - Voltage control
National Electrical Manufactures Association

6. Why is the term GMAW preferred over MIG or MAG?
Duty cycle
Wire feed speed - Voltage control
These terms are quite restrictive and often technically incorrect
...

7. What controls amperage when using GMAW?
To prevent leakage - Carbon Dioxide (CO2)
Wire feed speed
Flux cored wires
15 feet (4.5 meters)

8. What is an advantage of pulsed arc transfer with GMAW?
Dry ice can form within the flow control openings and cause blockage of shielding gas
These terms are quite restrictive and often technically incorrect
Higher 26 to 35 arc volts
Heat input is less than spray transfer - resulting in less distortion - Used in all positions due to controlling the weld metal freeze

9. Draw a typical volt amp curve for a machine that is designed for GMAW
Pressure vessels and the piping industry
12 to 22 arc volts
If you dont know this check your phone
Speed of the feed motor and - starting / stopping electrode feed

10. Why must CO2 cylinders be used in the vertical position?
(DCEP) Direct Current Electrode Positive or Reverse polarity
To prevent drawing of liquid CO2 (Carbon Dioxide)
5.8 to 12.5 L/min
...

11. Is the arc voltage for spray transfer higher or lower than that used for short circuit transfer?
Spatter problems and poor weld appearance
Gas metal arc welding
Higher 26 to 35 arc volts
If you dont know this check your phone

12. When is the metal transferred with short circuit transfer?
When the filler wire is in direct contract with the base metal
Constant voltage (CV)
The negative side of a welding unit
15 feet (4.5 meters)

13. What happens when the electrode extension is increased?
Spatter problems and poor weld appearance
The resistace to electrical current flow increases with it. Causing the electrode to heat
...
12 to 22 arc volts

14. What type of power source is commonly used with a voltage sensing wire feeder?
The time rate of response for the current rise and fall
Gives arc voltage values to the control system of the feeder
Constant current (CC)
85%

15. What effect does increasing and decreasing the inductance have on the weld?
Compressed gas cylinder - Liquid filled cylinder - or a Liquid bulk system
Gives arc voltage values to the control system of the feeder
Increasing inductance increases puddle fluidity - improves penatration - makes the bead flatter and smoother - and reduces spatter. To much inductance though will create erratic starts
Motor driven generators - Transformer rectifiers - and Inverter designs

16. What is the minimum % value of argon that must be present to use the spray transfer method of GMAW?
Voltage is the force that overcomes resistance to allow amperage flow
85%
National Electrical Manufactures Association
Welding process that joins metals by heating them with an electric arc

17. How many times per second does short circuiting take place?
By there current carrying capacity
85%
National Electrical Manufactures Association
20 to 200 times per second

18. What processes are constant current (CC) power sources designed to be used with?
SMAW - GTAW
Controls the rate of flow of a shielding gas to the gun nozzle
Cause flaking - which can clog the liner and contact tube
85%

19. What is the effect of too much slope?
Molten metal is separated from the end of the filler wire by a squeezing force created by a magnetic field
To limit the short circuiting current so that spatter is reduced
Insufficient current to melt the wire off cleanly
Constant voltage (CV)

20. What are the 2 types of wire feeders available?
Constant- speed wire feeders and Voltage- sennsing wire feeders
DCEP (Direct Current Electrode Positive) Reverse Polarity
Penetration and burn - off rate of the electrode
To prevent drawing of liquid CO2 (Carbon Dioxide)

21. What 2 organizations designate specifications for GMAW wires?
Dry ice can form within the flow control openings and cause blockage of shielding gas
AWS and CSA
The negative side of a welding unit
...

22. What does voltage do in an electrical circuit?
Voltage is the force that overcomes resistance to allow amperage flow
The resistace to electrical current flow increases with it. Causing the electrode to heat
85%
20 to 200 times per second

23. What current and polarity is generally used with GMAW?
To prevent leakage - Carbon Dioxide (CO2)
AWS and CSA
Compressed gas cylinder - Liquid filled cylinder - or a Liquid bulk system
DCEP (Direct Current Electrode Positive) Reverse Polarity

24. What type of power source is used with a constant speed wire feeder?
Constant voltage (CV)
Cause flaking - which can clog the liner and contact tube
AWS and CSA
Molten metal is separated from the end of the filler wire by a squeezing force created by a magnetic field

25. What is another term for electrode holders for GMAW?
Dry ice can form within the flow control openings and cause blockage of shielding gas
Guns
V groove or U groove
The resistace to electrical current flow increases with it. Causing the electrode to heat

26. What output on the welding machine is used to rate the duty cycle?
Constant- speed wire feeders and Voltage- sennsing wire feeders
SMAW - GTAW
Minutes of elapsed time continually run (out of 10 minutes)
To prevent leakage - Carbon Dioxide (CO2)

27. What is the preferred drive roll design for solid wires?
Penetration and burn - off rate of the electrode
V groove or U groove
To limit the short circuiting current so that spatter is reduced
Generally not as accurate

28. What does the term GMAW identify?
Voltage is the force that overcomes resistance to allow amperage flow
Gas metal arc welding
Flux cored wires
5.8 to 12.5 L/min

29. What would be an indication that the drive roll pressure is adjusted correctly?
Wire feeds smoothly (yet will slip should a problem occur in the gun)
3
Pressure - The rate of flow of a shielding gas
12 to 22 arc volts

30. What controls the wire speed on a voltage sensing wire feeder?
Constant- speed wire feeders and Voltage- sennsing wire feeders
Constant voltage (CV)
Welding process that joins metals by heating them with an electric arc
The Arc voltage

31. What is the required arc voltage used for short circuit transfer?
Puddle fluidity
V groove or U groove
12 to 22 arc volts
Welding process that joins metals by heating them with an electric arc

32. List 3 wire drive systems and give a short description of each
Push type: Wire is fed by a set of drive rolls located in the wire feed unit - Pull type: Drive rolls mounted in the gun itself - Push- pull type: Combination of the two
Guns
The negative side of a welding unit
To prevent drawing of liquid CO2 (Carbon Dioxide)

33. What is the main purpose of 'slope'?
Puddle fluidity
85%
To limit the short circuiting current so that spatter is reduced
...

34. A pull type drive system is usually used on what type of material?
Constant- speed wire feeders and Voltage- sennsing wire feeders
Spatter problems and poor weld appearance
Aluminum wire
Guns

35. In the GMAW process what does amperage control?
Pressure vessels and the piping industry
Penetration and burn - off rate of the electrode
Controls the rate of flow of a shielding gas to the gun nozzle
15 feet (4.5 meters)

36. What is the purpose of a regulator and what does it indicate on its gauges?
Gives arc voltage values to the control system of the feeder
Higher 26 to 35 arc volts
Compressed gas cylinder - Liquid filled cylinder - or a Liquid bulk system
Reducing the gas source pressure to a constant working pressure

37. List 3 forms compressed gases may be supplied for welding
Compressed gas cylinder - Liquid filled cylinder - or a Liquid bulk system
Gas metal arc welding
Pressure - The rate of flow of a shielding gas
Generally not as accurate

38. Why is globular transfer generally avoided with GMAW?
Spatter problems and poor weld appearance
Constant current (CC)
Aluminum wire
National Electrical Manufactures Association

39. How are GMAW guns rated?
Shielding the molten weld metal from atmospheric contamination
Constant voltage (CV)
To prevent drawing of liquid CO2 (Carbon Dioxide)
By there current carrying capacity

40. What is the key advantage of short circuiting transfer?
Minimum distortion due to low heat input
Pressure vessels and the piping industry
(DCEP) Direct Current Electrode Positive or Reverse polarity
Welding process that joins metals by heating them with an electric arc

41. Why is a fiber washer required and what cylinder gas requires it?
Pressure - The rate of flow of a shielding gas
Pressure vessels and the piping industry
Reducing the gas source pressure to a constant working pressure
To prevent leakage - Carbon Dioxide (CO2)

42. A machine with a 70% duty cycle can run at its max for 7 minutes with a cooling cycle of only _ minutes.
...
3
Constant- speed wire feeders and Voltage- sennsing wire feeders
The Arc voltage

43. What is the purpose of the shielding gas used in GMAW?
15 feet (4.5 meters)
V groove or U groove
Short- circuiting transfer - Globular transfer - Spray transfer
Shielding the molten weld metal from atmospheric contamination

44. What 2 controls are found on a GMAW set- up?
The time rate of response for the current rise and fall
Welding Current - Filler wire diameter - arc length - type of shielding - position of the weld
Gas metal arc welding
Wire feed speed - Voltage control

45. What does a flowmeter do and what does it measure?
Guns
5.8 to 12.5 L/min
Wire feed speed
Controls the rate of flow of a shielding gas to the gun nozzle

46. What power sources are used with the GMAW Process?
Wire feed speed - Voltage control
Motor driven generators - Transformer rectifiers - and Inverter designs
85%
If you dont know this check your phone

47. List the three methods of metal transfer with GMAW
Penetration and burn - off rate of the electrode
Short- circuiting transfer - Globular transfer - Spray transfer
Gives arc voltage values to the control system of the feeder
Wire feed speed

48. What is the disadvantage of the gauge preset type of regulator/flowmeter?
Voltage is the force that overcomes resistance to allow amperage flow
Penetration and burn - off rate of the electrode
Generally not as accurate
Increasing inductance increases puddle fluidity - improves penatration - makes the bead flatter and smoother - and reduces spatter. To much inductance though will create erratic starts

49. What is the recommended electrode stick- out for .035 solid wire?
Constant current (CC)
Generally not as accurate
1/4 inch to 1/2 inch
Insufficient current to melt the wire off cleanly

50. Give a description of 'pinch effect'
Welding process that joins metals by heating them with an electric arc
Constant voltage (CV)
To prevent drawing of liquid CO2 (Carbon Dioxide)
Molten metal is separated from the end of the filler wire by a squeezing force created by a magnetic field

Can you answer 50 questions in 15 minutes?

Major Subjects
Tests & Exams AP CLEP DSST GRE SAT GMAT	Certifications CISSP go to https://www.isc2.org/ PMP ITIL RHCE MCTS More...	IT Skills Android Programming Data Modeling Objective C Programming Basic Python Programming Adobe Illustrator More...	Business Skills Advertising Techniques Business Accounting Basics Business Strategy Human Resource Management Marketing Basics More...
Soft Skills Body Language People Skills Public Speaking Persuasion Job Hunting And Resumes More...	Vocabulary GRE Vocab SAT Vocab TOEFL Essential Vocab Basic English Words For All Global Words You Should Know Business English More...	Languages AP German Vocab AP Latin Vocab SAT Subject Test: French Italian Survival Norwegian Survival More...	Engineering Audio Engineering Computer Science Engineering Aerospace Engineering Chemical Engineering Structural Engineering More...
Health Sciences Basic Nursing Skills Health Science Language Fundamentals Veterinary Technology Medical Language Cardiology Clinical Surgery More...	English Grammar Fundamentals Literary And Rhetorical Vocab Elements Of Style Vocab Introduction To English Major Complete Advanced Sentences Literature Homonyms More...	Math Algebra Formulas Basic Arithmetic: Measurements Metric Conversions Geometric Properties Important Math Facts Number Sense Vocab Business Math More...	Other Major Subjects Science Economics History Law Performing-arts Cooking Logic & Reasoning Trivia

Test your basic knowledge |

Gas Metal Arc Welding

Can you answer 50 questions in 15 minutes?

Let me suggest you:

Browse all subjects

Browse all tests

Most popular tests

Major Subjects

Tests & Exams

Certifications

IT Skills

Business Skills

Soft Skills

Vocabulary

Languages

Engineering

Health Sciences

English

Math

Other Major Subjects

Browse all subjects

Browse all tests

Most popular tests