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 does the term GMAW identify?
V groove or U groove
Gas metal arc welding
Gives arc voltage values to the control system of the feeder
The resistace to electrical current flow increases with it. Causing the electrode to heat

2. In the GMAW process what does voltage control?
20 to 200 times per second
(DCEP) Direct Current Electrode Positive or Reverse polarity
Controls the rate of flow of a shielding gas to the gun nozzle
Puddle fluidity

3. In the GMAW process what does amperage control?
15 feet (4.5 meters)
Aluminum wire
These terms are quite restrictive and often technically incorrect
Penetration and burn - off rate of the electrode

4. List the basic equipment requirements for the GMAW process
Penetration and burn - off rate of the electrode
Gas metal arc welding
To prevent leakage - Carbon Dioxide (CO2)
Power source - wire feeder - welding gun - Spooled filler wire - Shielding gas - and a ground

5. How many times per second does short circuiting take place?
Shielding the molten weld metal from atmospheric contamination
Constant voltage (CV)
20 to 200 times per second
If you dont know this check your phone

6. What is the purpose of a regulator and what does it indicate on its gauges?
Electricaly operated valves that control the flow of shielding gas to the weld zone. The control switch located on the gun
SMAW - GTAW
Reducing the gas source pressure to a constant working pressure
Wire feed speed - Voltage control

7. What power sources are used with the GMAW Process?
Motor driven generators - Transformer rectifiers - and Inverter designs
Electricaly operated valves that control the flow of shielding gas to the weld zone. The control switch located on the gun
Insufficient current to melt the wire off cleanly
Increasing inductance increases puddle fluidity - improves penatration - makes the bead flatter and smoother - and reduces spatter. To much inductance though will create erratic starts

8. What term is used to describe when the workpiece is hooked to the negative pole on the power source?
Pressure vessels and the piping industry
(DCEP) Direct Current Electrode Positive or Reverse polarity
Heat input is less than spray transfer - resulting in less distortion - Used in all positions due to controlling the weld metal freeze
Speed of the feed motor and - starting / stopping electrode feed

9. 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)
Molten metal is separated from the end of the filler wire by a squeezing force created by a magnetic field
Spatter problems and poor weld appearance
Cause flaking - which can clog the liner and contact tube

10. What is a typical flow rate of CO2 for short circuit transfer?
5.8 to 12.5 L/min
...
Aluminum wire
Duty cycle

11. List the three methods of metal transfer with GMAW
Voltage is the force that overcomes resistance to allow amperage flow
Short- circuiting transfer - Globular transfer - Spray transfer
The negative side of a welding unit
Minutes of elapsed time continually run (out of 10 minutes)

12. List the factors that determine the mode of metal transfer
Guns
Welding Current - Filler wire diameter - arc length - type of shielding - position of the weld
1/4 inch to 1/2 inch
The Arc voltage

13. What 2 organizations designate specifications for GMAW wires?
AWS and CSA
...
Guns
Short- circuiting transfer - Globular transfer - Spray transfer

14. What is the maximum distance that hard wire can be successfully pushed?
20 to 200 times per second
15 feet (4.5 meters)
To prevent leakage - Carbon Dioxide (CO2)
The resistace to electrical current flow increases with it. Causing the electrode to heat

15. What effect does increasing and decreasing the inductance have on the weld?
Spatter problems and poor weld appearance
National Electrical Manufactures Association
Insufficient current to melt the wire off cleanly
Increasing inductance increases puddle fluidity - improves penatration - makes the bead flatter and smoother - and reduces spatter. To much inductance though will create erratic starts

16. Is the arc voltage for spray transfer higher or lower than that used for short circuit transfer?
Higher 26 to 35 arc volts
Gives arc voltage values to the control system of the feeder
Voltage is the force that overcomes resistance to allow amperage flow
Gas metal arc welding

17. What controls the wire speed on a voltage sensing wire feeder?
SMAW - GTAW
The Arc voltage
DCEP (Direct Current Electrode Positive) Reverse Polarity
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

18. What happens when the electrode extension is increased?
The resistace to electrical current flow increases with it. Causing the electrode to heat
Wire feed speed - Voltage control
Dry ice can form within the flow control openings and cause blockage of shielding gas
Puddle fluidity

19. Why is globular transfer generally avoided with GMAW?
Flux cored wires
Dry ice can form within the flow control openings and cause blockage of shielding gas
Spatter problems and poor weld appearance
Gas metal arc welding

20. What type of power source is used with a constant speed wire feeder?
Dry ice can form within the flow control openings and cause blockage of shielding gas
Reducing the gas source pressure to a constant working pressure
Constant voltage (CV)
Speed of the feed motor and - starting / stopping electrode feed

21. What current and polarity is generally used with GMAW?
DCEP (Direct Current Electrode Positive) Reverse Polarity
Voltage is the force that overcomes resistance to allow amperage flow
Short- circuiting transfer - Globular transfer - Spray transfer
20 to 200 times per second

22. What processes are constant current (CC) power sources designed to be used with?
Molten metal is separated from the end of the filler wire by a squeezing force created by a magnetic field
SMAW - GTAW
Generally not as accurate
Power source - wire feeder - welding gun - Spooled filler wire - Shielding gas - and a ground

23. What does voltage do in an electrical circuit?
Dry ice can form within the flow control openings and cause blockage of shielding gas
Wire feed speed
Voltage is the force that overcomes resistance to allow amperage flow
Gas metal arc welding

24. How are GMAW guns rated?
Pressure - The rate of flow of a shielding gas
Aluminum wire
By there current carrying capacity
Welding Current - Filler wire diameter - arc length - type of shielding - position of the weld

25. What are the 2 types of wire feeders available?
Dry ice can form within the flow control openings and cause blockage of shielding gas
These terms are quite restrictive and often technically incorrect
Constant- speed wire feeders and Voltage- sennsing wire feeders
Spatter problems and poor weld appearance

26. What does the wire feeder control?
Spatter problems and poor weld appearance
Speed of the feed motor and - starting / stopping electrode feed
AWS and CSA
3

27. A pull type drive system is usually used on what type of material?
Compressed gas cylinder - Liquid filled cylinder - or a Liquid bulk system
Wire feed speed - Voltage control
If you dont know this check your phone
Aluminum wire

28. List several industries that would use GMAW
Higher 26 to 35 arc volts
Constant voltage (CV)
3
Pressure vessels and the piping industry

29. What is the disadvantage of the gauge preset type of regulator/flowmeter?
Gives arc voltage values to the control system of the feeder
Generally not as accurate
Compressed gas cylinder - Liquid filled cylinder - or a Liquid bulk system
Motor driven generators - Transformer rectifiers - and Inverter designs

30. What is the minimum % value of argon that must be present to use the spray transfer method of GMAW?
Penetration and burn - off rate of the electrode
85%
Higher 26 to 35 arc volts
12 to 22 arc volts

31. What is a solenoid valve and what actuates it?
5.8 to 12.5 L/min
If you dont know this check your phone
Flux cored wires
Electricaly operated valves that control the flow of shielding gas to the weld zone. The control switch located on the gun

32. What is the purpose of the shielding gas used in GMAW?
Shielding the molten weld metal from atmospheric contamination
To prevent leakage - Carbon Dioxide (CO2)
Gas metal arc welding
Generally not as accurate

33. What type of power source is commonly used with a voltage sensing wire feeder?
By there current carrying capacity
Constant current (CC)
To limit the short circuiting current so that spatter is reduced
Cause flaking - which can clog the liner and contact tube

34. A machine with a 70% duty cycle can run at its max for 7 minutes with a cooling cycle of only _ minutes.
Gives arc voltage values to the control system of the feeder
Controls the rate of flow of a shielding gas to the gun nozzle
3
Dry ice can form within the flow control openings and cause blockage of shielding gas

35. Why must CO2 cylinders be used in the vertical position?
To prevent drawing of liquid CO2 (Carbon Dioxide)
Puddle fluidity
To prevent leakage - Carbon Dioxide (CO2)
Constant current (CC)

36. Why is a line heater required when using GMAW?
Power source - wire feeder - welding gun - Spooled filler wire - Shielding gas - and a ground
The negative side of a welding unit
Dry ice can form within the flow control openings and cause blockage of shielding gas
Voltage is the force that overcomes resistance to allow amperage flow

37. Give a description of 'pinch effect'
SMAW - GTAW
12 to 22 arc volts
Molten metal is separated from the end of the filler wire by a squeezing force created by a magnetic field
Reducing the gas source pressure to a constant working pressure

38. With straight polarity where is 2/3 of the arc energy?
Short- circuiting transfer - Globular transfer - Spray transfer
Welding process that joins metals by heating them with an electric arc
The negative side of a welding unit
Constant voltage (CV)

39. What is the reason glass 'tube' type flowmeters must have the tube mounted truly vertical?
Reducing the gas source pressure to a constant working pressure
If you dont know this check your phone
Puddle fluidity
...

40. Draw a typical volt/amp curve that would be found with a power source designed for SMAW or GTAW
If you dont know this check your phone
Speed of the feed motor and - starting / stopping electrode feed
To limit the short circuiting current so that spatter is reduced
Motor driven generators - Transformer rectifiers - and Inverter designs

41. List 3 wire drive systems and give a short description of each
20 to 200 times per second
Duty cycle
12 to 22 arc volts
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

42. 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
Shielding the molten weld metal from atmospheric contamination
Insufficient current to melt the wire off cleanly
Controls the rate of flow of a shielding gas to the gun nozzle

43. What wire are knurled drive rolls most commonly used on?
Flux cored wires
National Electrical Manufactures Association
Dry ice can form within the flow control openings and cause blockage of shielding gas
Wire feeds smoothly (yet will slip should a problem occur in the gun)

44. What is another term for electrode holders for GMAW?
National Electrical Manufactures Association
Molten metal is separated from the end of the filler wire by a squeezing force created by a magnetic field
Guns
SMAW - GTAW

45. What 2 controls are found on a GMAW set- up?
Aluminum wire
1/4 inch to 1/2 inch
Reducing the gas source pressure to a constant working pressure
Wire feed speed - Voltage control

46. List 3 forms compressed gases may be supplied for welding
Compressed gas cylinder - Liquid filled cylinder - or a Liquid bulk system
National Electrical Manufactures Association
When the filler wire is in direct contract with the base metal
Heat input is less than spray transfer - resulting in less distortion - Used in all positions due to controlling the weld metal freeze

47. What is the effect of too much slope?
Insufficient current to melt the wire off cleanly
Speed of the feed motor and - starting / stopping electrode feed
Penetration and burn - off rate of the electrode
To prevent drawing of liquid CO2 (Carbon Dioxide)

48. What is the key advantage of short circuiting transfer?
Minimum distortion due to low heat input
1/4 inch to 1/2 inch
Cause flaking - which can clog the liner and contact tube
Generally not as accurate

49. What output on the welding machine is used to rate the duty cycle?
Minutes of elapsed time continually run (out of 10 minutes)
If you dont know this check your phone
Higher 26 to 35 arc volts
To prevent drawing of liquid CO2 (Carbon Dioxide)

50. Why is the term GMAW preferred over MIG or MAG?
AWS and CSA
When the filler wire is in direct contract with the base metal
To prevent drawing of liquid CO2 (Carbon Dioxide)
These terms are quite restrictive and often technically incorrect

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