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. Draw a typical volt amp curve for a machine that is designed for GMAW
Power source - wire feeder - welding gun - Spooled filler wire - Shielding gas - and a ground
DCEP (Direct Current Electrode Positive) Reverse Polarity
Dry ice can form within the flow control openings and cause blockage of shielding gas
If you dont know this check your phone

2. Is the arc voltage for spray transfer higher or lower than that used for short circuit transfer?
Constant current (CC)
Higher 26 to 35 arc volts
Voltage is the force that overcomes resistance to allow amperage flow
To prevent drawing of liquid CO2 (Carbon Dioxide)

3. What processes are constant current (CC) power sources designed to be used with?
Aluminum wire
By there current carrying capacity
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
SMAW - GTAW

4. What type of power source is commonly used with a voltage sensing wire feeder?
Reducing the gas source pressure to a constant working pressure
Guns
Constant current (CC)
To prevent leakage - Carbon Dioxide (CO2)

5. How are GMAW guns rated?
Power source - wire feeder - welding gun - Spooled filler wire - Shielding gas - and a ground
Spatter problems and poor weld appearance
By there current carrying capacity
Voltage is the force that overcomes resistance to allow amperage flow

6. What effect does increasing and decreasing the inductance have on the weld?
The resistace to electrical current flow increases with it. Causing the electrode to heat
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 current (CC)
If you dont know this check your phone

7. What would be an indication that the drive roll pressure is adjusted correctly?
Wire feed speed - Voltage control
Cause flaking - which can clog the liner and contact tube
Wire feeds smoothly (yet will slip should a problem occur in the gun)
Insufficient current to melt the wire off cleanly

8. What does voltage do in an electrical circuit?
Higher 26 to 35 arc volts
1/4 inch to 1/2 inch
V groove or U groove
Voltage is the force that overcomes resistance to allow amperage flow

9. Why is a fiber washer required and what cylinder gas requires it?
20 to 200 times per second
AWS and CSA
National Electrical Manufactures Association
To prevent leakage - Carbon Dioxide (CO2)

10. What controls amperage when using GMAW?
Minutes of elapsed time continually run (out of 10 minutes)
Flux cored wires
The resistace to electrical current flow increases with it. Causing the electrode to heat
Wire feed speed

11. What is the key advantage of short circuiting transfer?
Compressed gas cylinder - Liquid filled cylinder - or a Liquid bulk system
Pressure - The rate of flow of a shielding gas
Cause flaking - which can clog the liner and contact tube
Minimum distortion due to low heat input

12. What does inductance control?
The time rate of response for the current rise and fall
The resistace to electrical current flow increases with it. Causing the electrode to heat
To prevent leakage - Carbon Dioxide (CO2)
AWS and CSA

13. What does the term GMAW identify?
Gas metal arc welding
1/4 inch to 1/2 inch
To limit the short circuiting current so that spatter is reduced
Penetration and burn - off rate of the electrode

14. Why is the term GMAW preferred over MIG or MAG?
These terms are quite restrictive and often technically incorrect
Spatter problems and poor weld appearance
If you dont know this check your phone
1/4 inch to 1/2 inch

15. What term is used to describe when the workpiece is hooked to the negative pole on the power source?
(DCEP) Direct Current Electrode Positive or Reverse polarity
Reducing the gas source pressure to a constant working pressure
85%
When the filler wire is in direct contract with the base metal

16. Give a description of 'pinch effect'
Molten metal is separated from the end of the filler wire by a squeezing force created by a magnetic field
Wire feeds smoothly (yet will slip should a problem occur in the gun)
Voltage is the force that overcomes resistance to allow amperage flow
Guns

17. What current and polarity is generally used with GMAW?
DCEP (Direct Current Electrode Positive) Reverse Polarity
Increasing inductance increases puddle fluidity - improves penatration - makes the bead flatter and smoother - and reduces spatter. To much inductance though will create erratic starts
Pressure - The rate of flow of a shielding gas
SMAW - GTAW

18. What is a solenoid valve and what actuates it?
5.8 to 12.5 L/min
Minutes of elapsed time continually run (out of 10 minutes)
Electricaly operated valves that control the flow of shielding gas to the weld zone. The control switch located on the gun
...

19. What is a typical flow rate of CO2 for short circuit transfer?
The time rate of response for the current rise and fall
Spatter problems and poor weld appearance
5.8 to 12.5 L/min
Generally not as accurate

20. What is the effect of too much slope?
Short- circuiting transfer - Globular transfer - Spray transfer
National Electrical Manufactures Association
The resistace to electrical current flow increases with it. Causing the electrode to heat
Insufficient current to melt the wire off cleanly

21. What is the disadvantage of the gauge preset type of regulator/flowmeter?
Heat input is less than spray transfer - resulting in less distortion - Used in all positions due to controlling the weld metal freeze
DCEP (Direct Current Electrode Positive) Reverse Polarity
Generally not as accurate
Wire feed speed

22. What is the required arc voltage used for short circuit transfer?
Wire feed speed - Voltage control
12 to 22 arc volts
By there current carrying capacity
Wire feeds smoothly (yet will slip should a problem occur in the gun)

23. What wire are knurled drive rolls most commonly used on?
DCEP (Direct Current Electrode Positive) Reverse Polarity
Flux cored wires
Wire feed speed - Voltage control
Reducing the gas source pressure to a constant working pressure

24. What is another term for electrode holders for GMAW?
5.8 to 12.5 L/min
Minimum distortion due to low heat input
Guns
Increasing inductance increases puddle fluidity - improves penatration - makes the bead flatter and smoother - and reduces spatter. To much inductance though will create erratic starts

25. What is the recommended electrode stick- out for .035 solid wire?
To limit the short circuiting current so that spatter is reduced
To prevent drawing of liquid CO2 (Carbon Dioxide)
1/4 inch to 1/2 inch
If you dont know this check your phone

26. Why is a line heater required when using GMAW?
5.8 to 12.5 L/min
Controls the rate of flow of a shielding gas to the gun nozzle
Wire feed speed - Voltage control
Dry ice can form within the flow control openings and cause blockage of shielding gas

27. What does the wire feeder control?
Speed of the feed motor and - starting / stopping electrode feed
To prevent leakage - Carbon Dioxide (CO2)
Puddle fluidity
Pressure vessels and the piping industry

28. Regulators control_____________ flowmeters SHOW____________.
Constant current (CC)
Constant voltage (CV)
Pressure - The rate of flow of a shielding gas
Minimum distortion due to low heat input

29. What controls the wire speed on a voltage sensing wire feeder?
To limit the short circuiting current so that spatter is reduced
The Arc voltage
5.8 to 12.5 L/min
Puddle fluidity

30. Give a brief description of the GMAW process
Welding process that joins metals by heating them with an electric arc
...
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

31. List 3 forms compressed gases may be supplied for welding
Compressed gas cylinder - Liquid filled cylinder - or a Liquid bulk system
Wire feed speed - Voltage control
Flux cored wires
Minimum distortion due to low heat input

32. 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
Power source - wire feeder - welding gun - Spooled filler wire - Shielding gas - and a ground
Constant voltage (CV)
Spatter problems and poor weld appearance

33. List the three methods of metal transfer with GMAW
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
...
Pressure vessels and the piping industry

34. What is the purpose of a regulator and what does it indicate on its gauges?
The resistace to electrical current flow increases with it. Causing the electrode to heat
Penetration and burn - off rate of the electrode
Reducing the gas source pressure to a constant working pressure
Molten metal is separated from the end of the filler wire by a squeezing force created by a magnetic field

35. What 2 organizations designate specifications for GMAW wires?
Power source - wire feeder - welding gun - Spooled filler wire - Shielding gas - and a ground
Cause flaking - which can clog the liner and contact tube
Increasing inductance increases puddle fluidity - improves penatration - makes the bead flatter and smoother - and reduces spatter. To much inductance though will create erratic starts
AWS and CSA

36. What power sources are used with the GMAW Process?
Puddle fluidity
12 to 22 arc volts
Motor driven generators - Transformer rectifiers - and Inverter designs
Cause flaking - which can clog the liner and contact tube

37. What is the purpose of the shielding gas used in GMAW?
If you dont know this check your phone
Minutes of elapsed time continually run (out of 10 minutes)
Shielding the molten weld metal from atmospheric contamination
The negative side of a welding unit

38. With straight polarity where is 2/3 of the arc energy?
The negative side of a welding unit
15 feet (4.5 meters)
Guns
Shielding the molten weld metal from atmospheric contamination

39. List several industries that would use GMAW
Pressure vessels and the piping industry
Short- circuiting transfer - Globular transfer - Spray transfer
Wire feeds smoothly (yet will slip should a problem occur in the gun)
By there current carrying capacity

40. What output on the welding machine is used to rate the duty cycle?
Minutes of elapsed time continually run (out of 10 minutes)
5.8 to 12.5 L/min
The Arc voltage
Welding process that joins metals by heating them with an electric arc

41. What type of power source is used with a constant speed wire feeder?
15 feet (4.5 meters)
Wire feed speed - Voltage control
Pressure - The rate of flow of a shielding gas
Constant voltage (CV)

42. In the GMAW process what does voltage control?
Motor driven generators - Transformer rectifiers - and Inverter designs
Wire feeds smoothly (yet will slip should a problem occur in the gun)
Puddle fluidity
3

43. A machine with a 70% duty cycle can run at its max for 7 minutes with a cooling cycle of only _ minutes.
3
5.8 to 12.5 L/min
Heat input is less than spray transfer - resulting in less distortion - Used in all positions due to controlling the weld metal freeze
Generally not as accurate

44. Why is globular transfer generally avoided with GMAW?
Constant- speed wire feeders and Voltage- sennsing wire feeders
Spatter problems and poor weld appearance
The resistace to electrical current flow increases with it. Causing the electrode to heat
Flux cored wires

45. What is the main purpose of 'slope'?
15 feet (4.5 meters)
To limit the short circuiting current so that spatter is reduced
3
DCEP (Direct Current Electrode Positive) Reverse Polarity

46. How many times per second does short circuiting take place?
Penetration and burn - off rate of the electrode
20 to 200 times per second
Minutes of elapsed time continually run (out of 10 minutes)
The time rate of response for the current rise and fall

47. When is the metal transferred with short circuit transfer?
1/4 inch to 1/2 inch
Pressure vessels and the piping industry
When the filler wire is in direct contract with the base metal
Welding Current - Filler wire diameter - arc length - type of shielding - position of the weld

48. What is the reason glass 'tube' type flowmeters must have the tube mounted truly vertical?
Insufficient current to melt the wire off cleanly
The Arc voltage
...
Compressed gas cylinder - Liquid filled cylinder - or a Liquid bulk system

49. When using flat drive rolls with too much pressure on copper coated solid wires what problem could take place?
Spatter problems and poor weld appearance
Gas metal arc welding
Duty cycle
Cause flaking - which can clog the liner and contact tube

50. What does a flowmeter do and what does it measure?
Flux cored wires
These terms are quite restrictive and often technically incorrect
Controls the rate of flow of a shielding gas to the gun nozzle
5.8 to 12.5 L/min

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