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 current and polarity is generally used with GMAW?
DCEP (Direct Current Electrode Positive) Reverse Polarity
The negative side of a welding unit
To prevent leakage - Carbon Dioxide (CO2)
Reducing the gas source pressure to a constant working pressure

2. How are GMAW guns rated?
By there current carrying capacity
National Electrical Manufactures Association
Electricaly operated valves that control the flow of shielding gas to the weld zone. The control switch located on the gun
3

3. A pull type drive system is usually used on what type of material?
Pressure - The rate of flow of a shielding gas
Wire feeds smoothly (yet will slip should a problem occur in the gun)
Heat input is less than spray transfer - resulting in less distortion - Used in all positions due to controlling the weld metal freeze
Aluminum wire

4. List 3 forms compressed gases may be supplied for welding
Speed of the feed motor and - starting / stopping electrode feed
Compressed gas cylinder - Liquid filled cylinder - or a Liquid bulk system
Duty cycle
SMAW - GTAW

5. Give a description of 'pinch effect'
15 feet (4.5 meters)
Molten metal is separated from the end of the filler wire by a squeezing force created by a magnetic field
AWS and CSA
These terms are quite restrictive and often technically incorrect

6. Why is the term GMAW preferred over MIG or MAG?
These terms are quite restrictive and often technically incorrect
Welding Current - Filler wire diameter - arc length - type of shielding - position of the weld
The negative side of a welding unit
Penetration and burn - off rate of the electrode

7. What 2 organizations designate specifications for GMAW wires?
Welding Current - Filler wire diameter - arc length - type of shielding - position of the weld
Wire feed speed - Voltage control
AWS and CSA
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

8. What are the 2 types of wire feeders available?
...
DCEP (Direct Current Electrode Positive) Reverse Polarity
Constant- speed wire feeders and Voltage- sennsing wire feeders
Reducing the gas source pressure to a constant working pressure

9. What does the term GMAW identify?
Electricaly operated valves that control the flow of shielding gas to the weld zone. The control switch located on the gun
Speed of the feed motor and - starting / stopping electrode feed
SMAW - GTAW
Gas metal arc welding

10. What happens when the electrode extension is increased?
These terms are quite restrictive and often technically incorrect
The resistace to electrical current flow increases with it. Causing the electrode to heat
The time rate of response for the current rise and fall
Short- circuiting transfer - Globular transfer - Spray transfer

11. What does the wire feeder control?
To prevent leakage - Carbon Dioxide (CO2)
Speed of the feed motor and - starting / stopping electrode feed
These terms are quite restrictive and often technically incorrect
Motor driven generators - Transformer rectifiers - and Inverter designs

12. Give a brief description of the GMAW process
1/4 inch to 1/2 inch
Welding process that joins metals by heating them with an electric arc
Gas metal arc welding
20 to 200 times per second

13. What would be an indication that the drive roll pressure is adjusted correctly?
Aluminum wire
Speed of the feed motor and - starting / stopping electrode feed
Pressure vessels and the piping industry
Wire feeds smoothly (yet will slip should a problem occur in the gun)

14. Why must CO2 cylinders be used in the vertical position?
If you dont know this check your phone
Short- circuiting transfer - Globular transfer - Spray transfer
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
To prevent drawing of liquid CO2 (Carbon Dioxide)

15. What controls the wire speed on a voltage sensing wire feeder?
Constant voltage (CV)
The Arc voltage
The resistace to electrical current flow increases with it. Causing the electrode to heat
Flux cored wires

16. A machine with a 70% duty cycle can run at its max for 7 minutes with a cooling cycle of only _ minutes.
These terms are quite restrictive and often technically incorrect
Insufficient current to melt the wire off cleanly
3
Spatter problems and poor weld appearance

17. What is the main purpose of 'slope'?
Cause flaking - which can clog the liner and contact tube
Constant- speed wire feeders and Voltage- sennsing wire feeders
To limit the short circuiting current so that spatter is reduced
85%

18. What is the reason glass 'tube' type flowmeters must have the tube mounted truly vertical?
3
The time rate of response for the current rise and fall
...
SMAW - GTAW

19. What is an advantage of pulsed arc transfer with GMAW?
Heat input is less than spray transfer - resulting in less distortion - Used in all positions due to controlling the weld metal freeze
Cause flaking - which can clog the liner and contact tube
The negative side of a welding unit
3

20. What controls amperage when using GMAW?
85%
The Arc voltage
...
Wire feed speed

21. How many times per second does short circuiting take place?
The resistace to electrical current flow increases with it. Causing the electrode to heat
Duty cycle
Insufficient current to melt the wire off cleanly
20 to 200 times per second

22. 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
To limit the short circuiting current so that spatter is reduced
AWS and CSA
Wire feed speed

23. With straight polarity where is 2/3 of the arc energy?
If you dont know this check your phone
If you dont know this check your phone
Speed of the feed motor and - starting / stopping electrode feed
The negative side of a welding unit

24. Why is a fiber washer required and what cylinder gas requires it?
To prevent leakage - Carbon Dioxide (CO2)
Gives arc voltage values to the control system of the feeder
85%
When the filler wire is in direct contract with the base metal

25. What is the minimum % value of argon that must be present to use the spray transfer method of GMAW?
Shielding the molten weld metal from atmospheric contamination
To prevent leakage - Carbon Dioxide (CO2)
Gas metal arc welding
85%

26. What is the required arc voltage used for short circuit transfer?
Duty cycle
Gas metal arc welding
The Arc voltage
12 to 22 arc volts

27. What effect does increasing and decreasing the inductance have on the weld?
The negative side of a welding unit
Increasing inductance increases puddle fluidity - improves penatration - makes the bead flatter and smoother - and reduces spatter. To much inductance though will create erratic starts
Heat input is less than spray transfer - resulting in less distortion - Used in all positions due to controlling the weld metal freeze
85%

28. What does a flowmeter do and what does it measure?
Controls the rate of flow of a shielding gas to the gun nozzle
Reducing the gas source pressure to a constant working pressure
Electricaly operated valves that control the flow of shielding gas to the weld zone. The control switch located on the gun
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

29. What is the maximum distance that hard wire can be successfully pushed?
Cause flaking - which can clog the liner and contact tube
15 feet (4.5 meters)
Gas metal arc welding
1/4 inch to 1/2 inch

30. What is a solenoid valve and what actuates it?
Higher 26 to 35 arc volts
Cause flaking - which can clog the liner and contact tube
(DCEP) Direct Current Electrode Positive or Reverse polarity
Electricaly operated valves that control the flow of shielding gas to the weld zone. The control switch located on the gun

31. Draw a typical volt amp curve for a machine that is designed for GMAW
20 to 200 times per second
3
Welding Current - Filler wire diameter - arc length - type of shielding - position of the weld
If you dont know this check your phone

32. A 10 minute cycle of welding time vs cooling time a given machine can handle.
SMAW - GTAW
National Electrical Manufactures Association
Duty cycle
By there current carrying capacity

33. Draw a typical volt/amp curve that would be found with a power source designed for SMAW or GTAW
Welding process that joins metals by heating them with an electric arc
If you dont know this check your phone
Gives arc voltage values to the control system of the feeder
Heat input is less than spray transfer - resulting in less distortion - Used in all positions due to controlling the weld metal freeze

34. When is the metal transferred with short circuit transfer?
SMAW - GTAW
The time rate of response for the current rise and fall
When the filler wire is in direct contract with the base metal
Constant voltage (CV)

35. What does voltage do in an electrical circuit?
Higher 26 to 35 arc volts
Voltage is the force that overcomes resistance to allow amperage flow
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
The negative side of a welding unit

36. When using flat drive rolls with too much pressure on copper coated solid wires what problem could take place?
Cause flaking - which can clog the liner and contact tube
12 to 22 arc volts
Dry ice can form within the flow control openings and cause blockage of shielding gas
Pressure - The rate of flow of a shielding gas

37. What is the purpose of the shielding gas used in GMAW?
Shielding the molten weld metal from atmospheric contamination
Gas metal arc welding
These terms are quite restrictive and often technically incorrect
Pressure - The rate of flow of a shielding gas

38. In the GMAW process what does amperage control?
These terms are quite restrictive and often technically incorrect
Penetration and burn - off rate of the electrode
Speed of the feed motor and - starting / stopping electrode feed
The Arc voltage

39. List several industries that would use GMAW
Pressure vessels and the piping industry
Higher 26 to 35 arc volts
Gas metal arc welding
To prevent leakage - Carbon Dioxide (CO2)

40. What wire are knurled drive rolls most commonly used on?
Higher 26 to 35 arc volts
Flux cored wires
Motor driven generators - Transformer rectifiers - and Inverter designs
To prevent drawing of liquid CO2 (Carbon Dioxide)

41. In the GMAW process what does voltage control?
Puddle fluidity
...
To prevent drawing of liquid CO2 (Carbon Dioxide)
Higher 26 to 35 arc volts

42. Why is globular transfer generally avoided with GMAW?
15 feet (4.5 meters)
Motor driven generators - Transformer rectifiers - and Inverter designs
12 to 22 arc volts
Spatter problems and poor weld appearance

43. What is the preferred drive roll design for solid wires?
Wire feed speed - Voltage control
The Arc voltage
V groove or U groove
Pressure - The rate of flow of a shielding gas

44. What is the disadvantage of the gauge preset type of regulator/flowmeter?
Dry ice can form within the flow control openings and cause blockage of shielding gas
The Arc voltage
Generally not as accurate
By there current carrying capacity

45. List the three methods of metal transfer with GMAW
National Electrical Manufactures Association
Constant- speed wire feeders and Voltage- sennsing wire feeders
Short- circuiting transfer - Globular transfer - Spray transfer
DCEP (Direct Current Electrode Positive) Reverse Polarity

46. What does the abbreviation NEMA stand for?
If you dont know this check your phone
National Electrical Manufactures Association
Increasing inductance increases puddle fluidity - improves penatration - makes the bead flatter and smoother - and reduces spatter. To much inductance though will create erratic starts
Constant- speed wire feeders and Voltage- sennsing wire feeders

47. What power sources are used with the GMAW Process?
The negative side of a welding unit
Insufficient current to melt the wire off cleanly
Wire feed speed - Voltage control
Motor driven generators - Transformer rectifiers - and Inverter designs

48. List the basic equipment requirements for the GMAW process
Constant- speed wire feeders and Voltage- sennsing wire feeders
Reducing the gas source pressure to a constant working pressure
To prevent drawing of liquid CO2 (Carbon Dioxide)
Power source - wire feeder - welding gun - Spooled filler wire - Shielding gas - and a ground

49. What is a typical flow rate of CO2 for short circuit transfer?
Flux cored wires
Motor driven generators - Transformer rectifiers - and Inverter designs
5.8 to 12.5 L/min
National Electrical Manufactures Association

50. What 2 controls are found on a GMAW set- up?
Wire feed speed - Voltage control
Speed of the feed motor and - starting / stopping electrode feed
Wire feed speed
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

Sorry!:) No result found.

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

Sorry!:) No result found.

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