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 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
Puddle fluidity
1/4 inch to 1/2 inch
Power source - wire feeder - welding gun - Spooled filler wire - Shielding gas - and a ground

2. What is a solenoid valve and what actuates it?
85%
The resistace to electrical current flow increases with it. Causing the electrode to heat
Electricaly operated valves that control the flow of shielding gas to the weld zone. The control switch located on the gun
Short- circuiting transfer - Globular transfer - Spray transfer

3. What is the preferred drive roll design for solid wires?
Constant- speed wire feeders and Voltage- sennsing wire feeders
3
Increasing inductance increases puddle fluidity - improves penatration - makes the bead flatter and smoother - and reduces spatter. To much inductance though will create erratic starts
V groove or U groove

4. Give a brief description of the GMAW process
Controls the rate of flow of a shielding gas to the gun nozzle
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)
3

5. What is another term for electrode holders for GMAW?
Guns
Motor driven generators - Transformer rectifiers - and Inverter designs
Constant voltage (CV)
12 to 22 arc volts

6. When is the metal transferred with short circuit transfer?
Duty cycle
When the filler wire is in direct contract with the base metal
Insufficient current to melt the wire off cleanly
Electricaly operated valves that control the flow of shielding gas to the weld zone. The control switch located on the gun

7. Why is a fiber washer required and what cylinder gas requires it?
To prevent leakage - Carbon Dioxide (CO2)
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
5.8 to 12.5 L/min
(DCEP) Direct Current Electrode Positive or Reverse polarity

8. What output on the welding machine is used to rate the duty cycle?
12 to 22 arc volts
Minutes of elapsed time continually run (out of 10 minutes)
The negative side of a welding unit
The time rate of response for the current rise and fall

9. What is the main purpose of 'slope'?
The resistace to electrical current flow increases with it. Causing the electrode to heat
Wire feeds smoothly (yet will slip should a problem occur in the gun)
Wire feed speed - Voltage control
To limit the short circuiting current so that spatter is reduced

10. What does voltage do in an electrical circuit?
By there current carrying capacity
Wire feed speed
SMAW - GTAW
Voltage is the force that overcomes resistance to allow amperage flow

11. What is the effect of too much slope?
Aluminum wire
12 to 22 arc volts
20 to 200 times per second
Insufficient current to melt the wire off cleanly

12. Draw a typical volt/amp curve that would be found with a power source designed for SMAW or GTAW
Wire feeds smoothly (yet will slip should a problem occur in the gun)
Welding Current - Filler wire diameter - arc length - type of shielding - position of the weld
If you dont know this check your phone
These terms are quite restrictive and often technically incorrect

13. What power sources are used with the GMAW Process?
Motor driven generators - Transformer rectifiers - and Inverter designs
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

14. Draw a typical volt amp curve for a machine that is designed for GMAW
Higher 26 to 35 arc volts
Insufficient current to melt the wire off cleanly
If you dont know this check your phone
Cause flaking - which can clog the liner and contact tube

15. When using flat drive rolls with too much pressure on copper coated solid wires what problem could take place?
Molten metal is separated from the end of the filler wire by a squeezing force created by a magnetic field
Cause flaking - which can clog the liner and contact tube
Voltage is the force that overcomes resistance to allow amperage flow
SMAW - GTAW

16. What type of power source is commonly used with a voltage sensing wire feeder?
When the filler wire is in direct contract with the base metal
Constant current (CC)
Wire feed speed
Compressed gas cylinder - Liquid filled cylinder - or a Liquid bulk system

17. What is the maximum distance that hard wire can be successfully pushed?
5.8 to 12.5 L/min
The time rate of response for the current rise and fall
15 feet (4.5 meters)
Pressure vessels and the piping industry

18. List the factors that determine the mode of metal transfer
Welding Current - Filler wire diameter - arc length - type of shielding - position of the weld
These terms are quite restrictive and often technically incorrect
When the filler wire is in direct contract with the base metal
20 to 200 times per second

19. What is the required arc voltage used for short circuit transfer?
Cause flaking - which can clog the liner and contact tube
12 to 22 arc volts
Electricaly operated valves that control the flow of shielding gas to the weld zone. The control switch located on the gun
Higher 26 to 35 arc volts

20. What does inductance control?
Heat input is less than spray transfer - resulting in less distortion - Used in all positions due to controlling the weld metal freeze
Insufficient current to melt the wire off cleanly
The time rate of response for the current rise and fall
Spatter problems and poor weld appearance

21. Why must CO2 cylinders be used in the vertical position?
Guns
To prevent drawing of liquid CO2 (Carbon Dioxide)
Increasing inductance increases puddle fluidity - improves penatration - makes the bead flatter and smoother - and reduces spatter. To much inductance though will create erratic starts
Shielding the molten weld metal from atmospheric contamination

22. What term is used to describe when the workpiece is hooked to the negative pole on the power source?
DCEP (Direct Current Electrode Positive) Reverse Polarity
Constant- speed wire feeders and Voltage- sennsing wire feeders
(DCEP) Direct Current Electrode Positive or Reverse polarity
Welding Current - Filler wire diameter - arc length - type of shielding - position of the weld

23. How are GMAW guns rated?
...
Wire feeds smoothly (yet will slip should a problem occur in the gun)
By there current carrying capacity
Reducing the gas source pressure to a constant working pressure

24. List the three methods of metal transfer with GMAW
DCEP (Direct Current Electrode Positive) Reverse Polarity
Generally not as accurate
12 to 22 arc volts
Short- circuiting transfer - Globular transfer - Spray transfer

25. 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)
Shielding the molten weld metal from atmospheric contamination
85%
Compressed gas cylinder - Liquid filled cylinder - or a Liquid bulk system

26. What is the key advantage of short circuiting transfer?
The Arc voltage
Minimum distortion due to low heat input
Spatter problems and poor weld appearance
DCEP (Direct Current Electrode Positive) Reverse Polarity

27. What type of power source is used with a constant speed wire feeder?
20 to 200 times per second
Minimum distortion due to low heat input
Constant voltage (CV)
Insufficient current to melt the wire off cleanly

28. With straight polarity where is 2/3 of the arc energy?
Power source - wire feeder - welding gun - Spooled filler wire - Shielding gas - and a ground
These terms are quite restrictive and often technically incorrect
National Electrical Manufactures Association
The negative side of a welding unit

29. List the basic equipment requirements for the GMAW process
Controls the rate of flow of a shielding gas to the gun nozzle
Power source - wire feeder - welding gun - Spooled filler wire - Shielding gas - and a ground
Puddle fluidity
V groove or U groove

30. What does the term GMAW identify?
Gas metal arc welding
15 feet (4.5 meters)
(DCEP) Direct Current Electrode Positive or Reverse polarity
The negative side of a welding unit

31. What is the disadvantage of the gauge preset type of regulator/flowmeter?
If you dont know this check your phone
If you dont know this check your phone
Generally not as accurate
Wire feed speed - Voltage control

32. In the GMAW process what does voltage control?
By there current carrying capacity
Puddle fluidity
Shielding the molten weld metal from atmospheric contamination
Wire feed speed

33. What current and polarity is generally used with GMAW?
Reducing the gas source pressure to a constant working pressure
Generally not as accurate
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

34. A 10 minute cycle of welding time vs cooling time a given machine can handle.
Minimum distortion due to low heat input
National Electrical Manufactures Association
To prevent drawing of liquid CO2 (Carbon Dioxide)
Duty cycle

35. What 2 controls are found on a GMAW set- up?
AWS and CSA
15 feet (4.5 meters)
5.8 to 12.5 L/min
Wire feed speed - Voltage control

36. What does a flowmeter do and what does it measure?
Controls the rate of flow of a shielding gas to the gun nozzle
SMAW - GTAW
20 to 200 times per second
15 feet (4.5 meters)

37. What processes are constant current (CC) power sources designed to be used with?
The time rate of response for the current rise and fall
By there current carrying capacity
SMAW - GTAW
Heat input is less than spray transfer - resulting in less distortion - Used in all positions due to controlling the weld metal freeze

38. What does the abbreviation NEMA stand for?
National Electrical Manufactures Association
Welding process that joins metals by heating them with an electric arc
Constant current (CC)
Compressed gas cylinder - Liquid filled cylinder - or a Liquid bulk system

39. What does the wire feeder control?
Compressed gas cylinder - Liquid filled cylinder - or a Liquid bulk system
3
Speed of the feed motor and - starting / stopping electrode feed
Guns

40. What are the 2 types of wire feeders available?
Constant voltage (CV)
Dry ice can form within the flow control openings and cause blockage of shielding gas
To prevent leakage - Carbon Dioxide (CO2)
Constant- speed wire feeders and Voltage- sennsing wire feeders

41. Why is a line heater required when using GMAW?
Guns
Shielding the molten weld metal from atmospheric contamination
Dry ice can form within the flow control openings and cause blockage of shielding gas
Power source - wire feeder - welding gun - Spooled filler wire - Shielding gas - and a ground

42. What is the purpose of the pick- up lead on a voltage sensing wire feeder?
To prevent leakage - Carbon Dioxide (CO2)
V groove or U groove
Gives arc voltage values to the control system of the feeder
The Arc voltage

43. A pull type drive system is usually used on what type of material?
20 to 200 times per second
Wire feed speed
Aluminum wire
Voltage is the force that overcomes resistance to allow amperage flow

44. A machine with a 70% duty cycle can run at its max for 7 minutes with a cooling cycle of only _ minutes.
Power source - wire feeder - welding gun - Spooled filler wire - Shielding gas - and a ground
SMAW - GTAW
Minimum distortion due to low heat input
3

45. What is the purpose of a regulator and what does it indicate on its gauges?
Reducing the gas source pressure to a constant working pressure
20 to 200 times per second
Puddle fluidity
Shielding the molten weld metal from atmospheric contamination

46. In the GMAW process what does amperage control?
Constant voltage (CV)
Electricaly operated valves that control the flow of shielding gas to the weld zone. The control switch located on the gun
Gives arc voltage values to the control system of the feeder
Penetration and burn - off rate of the electrode

47. What is the purpose of the shielding gas used in GMAW?
When the filler wire is in direct contract with the base metal
Constant current (CC)
Shielding the molten weld metal from atmospheric contamination
By there current carrying capacity

48. What wire are knurled drive rolls most commonly used on?
To prevent drawing of liquid CO2 (Carbon Dioxide)
85%
Flux cored wires
Welding Current - Filler wire diameter - arc length - type of shielding - position of the weld

49. What is the minimum % value of argon that must be present to use the spray transfer method of GMAW?
Wire feed speed - Voltage control
Welding Current - Filler wire diameter - arc length - type of shielding - position of the weld
85%
...

50. List 3 wire drive systems and give a short description of each
20 to 200 times per second
Gives arc voltage values to the control system of the feeder
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
Higher 26 to 35 arc volts

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