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. Regulators control_____________ flowmeters SHOW____________.
Pressure - The rate of flow of a shielding gas
Voltage is the force that overcomes resistance to allow amperage flow
Heat input is less than spray transfer - resulting in less distortion - Used in all positions due to controlling the weld metal freeze
Molten metal is separated from the end of the filler wire by a squeezing force created by a magnetic field

2. What controls the wire speed on a voltage sensing wire feeder?
Compressed gas cylinder - Liquid filled cylinder - or a Liquid bulk system
The Arc voltage
Constant current (CC)
To prevent leakage - Carbon Dioxide (CO2)

3. Why must CO2 cylinders be used in the vertical position?
To prevent drawing of liquid CO2 (Carbon Dioxide)
If you dont know this check your phone
Welding Current - Filler wire diameter - arc length - type of shielding - position of the weld
Higher 26 to 35 arc volts

4. What wire are knurled drive rolls most commonly used on?
Flux cored wires
Power source - wire feeder - welding gun - Spooled filler wire - Shielding gas - and a ground
Generally not as accurate
Shielding the molten weld metal from atmospheric contamination

5. What is the maximum distance that hard wire can be successfully pushed?
Generally not as accurate
Pressure vessels and the piping industry
15 feet (4.5 meters)
SMAW - GTAW

6. List the basic equipment requirements for the GMAW process
Short- circuiting transfer - Globular transfer - Spray transfer
Power source - wire feeder - welding gun - Spooled filler wire - Shielding gas - and a ground
Controls the rate of flow of a shielding gas to the gun nozzle
Gas metal arc welding

7. What is a solenoid valve and what actuates it?
Electricaly operated valves that control the flow of shielding gas to the weld zone. The control switch located on the gun
To prevent drawing of liquid CO2 (Carbon Dioxide)
Spatter problems and poor weld appearance
Penetration and burn - off rate of the electrode

8. What controls amperage when using GMAW?
Wire feed speed - Voltage control
Wire feed speed
National Electrical Manufactures Association
When the filler wire is in direct contract with the base metal

9. What are the 2 types of wire feeders available?
Pressure vessels and the piping industry
Constant- speed wire feeders and Voltage- sennsing wire feeders
Motor driven generators - Transformer rectifiers - and Inverter designs
If you dont know this check your phone

10. What does inductance control?
Pressure - The rate of flow of a shielding gas
85%
1/4 inch to 1/2 inch
The time rate of response for the current rise and fall

11. Why is a fiber washer required and what cylinder gas requires it?
Puddle fluidity
AWS and CSA
Shielding the molten weld metal from atmospheric contamination
To prevent leakage - Carbon Dioxide (CO2)

12. List the three methods of metal transfer with GMAW
Gives arc voltage values to the control system of the feeder
Generally not as accurate
Pressure - The rate of flow of a shielding gas
Short- circuiting transfer - Globular transfer - Spray transfer

13. What is the purpose of the pick- up lead on a voltage sensing wire feeder?
Compressed gas cylinder - Liquid filled cylinder - or a Liquid bulk system
Gives arc voltage values to the control system of the feeder
Penetration and burn - off rate of the electrode
To limit the short circuiting current so that spatter is reduced

14. What type of power source is used with a constant speed wire feeder?
Welding process that joins metals by heating them with an electric arc
Insufficient current to melt the wire off cleanly
Constant voltage (CV)
When the filler wire is in direct contract with the base metal

15. When is the metal transferred with short circuit transfer?
Spatter problems and poor weld appearance
When the filler wire is in direct contract with the base metal
3
Gives arc voltage values to the control system of the feeder

16. Why is globular transfer generally avoided with GMAW?
Penetration and burn - off rate of the electrode
The Arc voltage
Pressure - The rate of flow of a shielding gas
Spatter problems and poor weld appearance

17. What current and polarity is generally used with GMAW?
Pressure - The rate of flow of a shielding gas
Spatter problems and poor weld appearance
DCEP (Direct Current Electrode Positive) Reverse Polarity
Flux cored wires

18. What is the preferred drive roll design for solid wires?
V groove or U groove
Welding Current - Filler wire diameter - arc length - type of shielding - position of the weld
AWS and CSA
Dry ice can form within the flow control openings and cause blockage of shielding gas

19. What is the key advantage of short circuiting transfer?
Minimum distortion due to low heat input
Guns
Constant- speed wire feeders and Voltage- sennsing wire feeders
When the filler wire is in direct contract with the base metal

20. What is the required arc voltage used for short circuit transfer?
Increasing inductance increases puddle fluidity - improves penatration - makes the bead flatter and smoother - and reduces spatter. To much inductance though will create erratic starts
12 to 22 arc volts
Gas metal arc welding
Motor driven generators - Transformer rectifiers - and Inverter designs

21. A 10 minute cycle of welding time vs cooling time a given machine can handle.
Spatter problems and poor weld appearance
Duty cycle
Voltage is the force that overcomes resistance to allow amperage flow
If you dont know this check your phone

22. What is the recommended electrode stick- out for .035 solid wire?
Guns
AWS and CSA
(DCEP) Direct Current Electrode Positive or Reverse polarity
1/4 inch to 1/2 inch

23. What is the effect of too much slope?
These terms are quite restrictive and often technically incorrect
Insufficient current to melt the wire off cleanly
Wire feeds smoothly (yet will slip should a problem occur in the gun)
Pressure vessels and the piping industry

24. What output on the welding machine is used to rate the duty cycle?
Welding process that joins metals by heating them with an electric arc
Cause flaking - which can clog the liner and contact tube
Minutes of elapsed time continually run (out of 10 minutes)
These terms are quite restrictive and often technically incorrect

25. What 2 organizations designate specifications for GMAW wires?
AWS and CSA
...
To prevent leakage - Carbon Dioxide (CO2)
20 to 200 times per second

26. What does the wire feeder control?
National Electrical Manufactures Association
Reducing the gas source pressure to a constant working pressure
Speed of the feed motor and - starting / stopping electrode feed
Controls the rate of flow of a shielding gas to the gun nozzle

27. What processes are constant current (CC) power sources designed to be used with?
Pressure vessels and the piping industry
Penetration and burn - off rate of the electrode
Reducing the gas source pressure to a constant working pressure
SMAW - GTAW

28. What does the abbreviation NEMA stand for?
Welding Current - Filler wire diameter - arc length - type of shielding - position of the weld
National Electrical Manufactures Association
To limit the short circuiting current so that spatter is reduced
Speed of the feed motor and - starting / stopping electrode feed

29. How many times per second does short circuiting take place?
Controls the rate of flow of a shielding gas to the gun nozzle
20 to 200 times per second
The resistace to electrical current flow increases with it. Causing the electrode to heat
3

30. Draw a typical volt amp curve for a machine that is designed for GMAW
Constant current (CC)
If you dont know this check your phone
12 to 22 arc volts
Constant voltage (CV)

31. A machine with a 70% duty cycle can run at its max for 7 minutes with a cooling cycle of only _ minutes.
1/4 inch to 1/2 inch
Welding Current - Filler wire diameter - arc length - type of shielding - position of the weld
3
DCEP (Direct Current Electrode Positive) Reverse Polarity

32. In the GMAW process what does voltage control?
Welding process that joins metals by heating them with an electric arc
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
Puddle fluidity
Speed of the feed motor and - starting / stopping electrode feed

33. What 2 controls are found on a GMAW set- up?
Constant voltage (CV)
Wire feed speed - Voltage control
Insufficient current to melt the wire off cleanly
85%

34. What does the term GMAW identify?
Reducing the gas source pressure to a constant working pressure
...
Gas metal arc welding
Welding Current - Filler wire diameter - arc length - type of shielding - position of the weld

35. What does voltage do in an electrical circuit?
Voltage is the force that overcomes resistance to allow amperage flow
To prevent leakage - Carbon Dioxide (CO2)
DCEP (Direct Current Electrode Positive) Reverse Polarity
Flux cored wires

36. What is the minimum % value of argon that must be present to use the spray transfer method of GMAW?
85%
To prevent leakage - Carbon Dioxide (CO2)
(DCEP) Direct Current Electrode Positive or Reverse polarity
The resistace to electrical current flow increases with it. Causing the electrode to heat

37. What is the reason glass 'tube' type flowmeters must have the tube mounted truly vertical?
Puddle fluidity
Wire feeds smoothly (yet will slip should a problem occur in the gun)
...
Higher 26 to 35 arc volts

38. 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
Generally not as accurate
20 to 200 times per second
To prevent leakage - Carbon Dioxide (CO2)

39. What is an advantage of pulsed arc transfer with GMAW?
Wire feed speed - Voltage control
The Arc voltage
Heat input is less than spray transfer - resulting in less distortion - Used in all positions due to controlling the weld metal freeze
Pressure - The rate of flow of a shielding gas

40. What effect does increasing and decreasing the inductance have on the weld?
When the filler wire is in direct contract with the base metal
Dry ice can form within the flow control openings and cause blockage of shielding gas
The time rate of response for the current rise and fall
Increasing inductance increases puddle fluidity - improves penatration - makes the bead flatter and smoother - and reduces spatter. To much inductance though will create erratic starts

41. When using flat drive rolls with too much pressure on copper coated solid wires what problem could take place?
Electricaly operated valves that control the flow of shielding gas to the weld zone. The control switch located on the gun
Cause flaking - which can clog the liner and contact tube
These terms are quite restrictive and often technically incorrect
Compressed gas cylinder - Liquid filled cylinder - or a Liquid bulk system

42. List several industries that would use GMAW
Pressure vessels and the piping industry
If you dont know this check your phone
National Electrical Manufactures Association
Wire feeds smoothly (yet will slip should a problem occur in the gun)

43. Why is a line heater required when using GMAW?
If you dont know this check your phone
Guns
Welding Current - Filler wire diameter - arc length - type of shielding - position of the weld
Dry ice can form within the flow control openings and cause blockage of shielding gas

44. How are GMAW guns rated?
By there current carrying capacity
Guns
Minimum distortion due to low heat input
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

45. Give a brief description of the GMAW process
Puddle fluidity
Welding process that joins metals by heating them with an electric arc
Compressed gas cylinder - Liquid filled cylinder - or a Liquid bulk system
Penetration and burn - off rate of the electrode

46. What happens when the electrode extension is increased?
Wire feeds smoothly (yet will slip should a problem occur in 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
Pressure vessels and the piping industry
The resistace to electrical current flow increases with it. Causing the electrode to heat

47. What is the purpose of the shielding gas used in GMAW?
Compressed gas cylinder - Liquid filled cylinder - or a Liquid bulk system
When the filler wire is in direct contract with the base metal
Insufficient current to melt the wire off cleanly
Shielding the molten weld metal from atmospheric contamination

48. 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
Pressure vessels and the piping industry
Reducing the gas source pressure to a constant working pressure
AWS and CSA

49. What does a flowmeter do and what does it measure?
Power source - wire feeder - welding gun - Spooled filler wire - Shielding gas - and a ground
If you dont know this check your phone
Controls the rate of flow of a shielding gas to the gun nozzle
(DCEP) Direct Current Electrode Positive or Reverse polarity

50. What is another term for electrode holders for GMAW?
(DCEP) Direct Current Electrode Positive or Reverse polarity
Guns
Pressure vessels and the piping industry
To prevent drawing of liquid CO2 (Carbon Dioxide)

Sorry, Topic not found.:)

Seach or Brouse Basicversity:

Major Subjects
Tests & Exams AP CLEP DSST GRE SAT GMAT	Certifications CISSP go 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

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