Welding
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| show | Flat welds
Controls speed
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| show | Good for filling
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| Occilation | show 🗑
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| Frequency | show 🗑
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| show | Uses 90% argon gas
Only used in flat or horizontal welds
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| Pulse Technique | show 🗑
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| show | Excess material breaking off and melting to materials
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| show | E-electrode
R-rod
70-tensile strength
S-solid. (this refers to the state and can be I either S for solid or C for core)
6- class of metal
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| What does MIG stand for | show 🗑
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| 6 things needed for MIG welding | show 🗑
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| In MIG welding explain power source | show 🗑
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| show | Carbon dioxide
Argon
Helium
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| show | Short circut- 14-21v
Globular-21-21.3v
Spray
Pulased arc- also known as GMAW
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| What does GMAW stand for | show 🗑
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| Describe Short circuit transfer method | show 🗑
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| show | small percentage change in voltage leads to a large percentage change in current
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| show | Argon.
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| show | volume
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| When selecting a nozzle for GTAW or GMAW, what determines the nozzle diameter? | show 🗑
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| show | carbon dioxide
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| What number filter lens is recommended for use with GTAW, GMAW, and FCAW? | show 🗑
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| The polarity used with almost all GMAW applications is ____. | show 🗑
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| Which of the following is not a GMAW metal transfer method? a. Short circuit. b. Solid metal. c. Spray. d. Globular. | show 🗑
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| In the spray transfer method of metal transfer, the metal travels across the arc as ____. | show 🗑
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| show | transition
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| Spray transfer will occur only when the percentage of argon in the mixture is above ____ percent. | show 🗑
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| show | birds nest
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| show | inch
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| Which of the following statements is not true for GMAW? a. It can be used in all positions. b. It can be used to weld magnesium. c. It can be used to weld all commercially important metals. d. It is also known as TIG welding. | show 🗑
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| Which of the following statements is not true for GMAW with a short circuiting arc? a. The weld pool cools slowly. b. There is no metal transfer through the arc. c. It works in all welding positions. d. It works on metal in the overhead position. | show 🗑
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| show | The surface tension of the pool and pinch force
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| The pulsed spray transfer method uses the peak current for welding. The background current is used to ____ the arc. | show 🗑
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| When GMAW, changing the wire feed speed changes the ____. | show 🗑
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| Why is it possible and desirable to use a narrower groove when V-groove butt welding with GMAW or FCAW than with SMAW? | show 🗑
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| show | nozzle-to-work distance
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| show | c. holding the nozzle at the end of the weld during the postflow of the shielding gas
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| show | short circuit
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| show | point the electrode more toward the surface
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| What information is obtained from the first two or three digits of an AWS electrode classification number? | show 🗑
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| The ____ is revealed by the last two digits of the AWS electrode classification number | show 🗑
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| show | 2nd
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| A number ____ filter lens is recommended for SMAW | show 🗑
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| A(n) ____ arc welding machine may consist of a DC rectifier and an alternator | show 🗑
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| A DCEP electrode has the same direction of flow as an electrode with a ____ designation | show 🗑
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| What duty cycle is recommended for a welding machine that is to be used with automatic or semi-automatic welding? | show 🗑
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| show | 6500–7000
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| show | 60-80
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| show | The rate at which you wish to deposit the filler metal
The type of base metal
The position of the joint
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| show | The person may be temporarily blinded.
The person may see white spots for a time.
Permanent damage to the retina may occur.
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| show | 6 times
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| show | allow the weld time to cool
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| Where should a weld be restarted on a previously unfinished bead? | show 🗑
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| Undercut in a horizontal inside corner joint usually is a(n) ____ | show 🗑
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| show | Decrease the arc gap slightly.
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| show | Stopping momentarily at the upper end of each electrode movement
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| Welding machines used for GMAW or FCAW must be constant-____________________ type machines | show 🗑
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| show | oxygen
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| Argon has a lower heat ____________________ than helium | show 🗑
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| show | oxygen
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| The development of the constant ____________________ welding machine made the use of GMAW more practical. | show 🗑
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| When GMAW or FCAW, the welder must control the welding speed, the nozzle-to-work distance, and the ____________________. | show 🗑
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| show | DCEN DCSP
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| The constant ____________________ machine is most desirable when doing manual arc welding | show 🗑
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| show | DCEP
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| When using a constant current machine, if the arc gap increases, the resistance will ____________________. | show 🗑
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| Each bead is cleaned before the next bead is made to prevent ____________________ inclusions | show 🗑
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| small electrodes are used for-------- | show 🗑
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| Large Diameter Electrodes are used for------ | show 🗑
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| T/F FCAW may be used without a pressurized shielding gas | show 🗑
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| show | T
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| show | T
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| show | T
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| T/F Good ventilation is especially important when using CO2 gas | show 🗑
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| show | T
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| T/F GMAW can be done only when using DCEP. | show 🗑
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| T/F Both GMAW and FCAW may be semi-automatic or automatic processes | show 🗑
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| show | F
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| show | T
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| show | F
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| show | T
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| T/F Using a CC welding machine, the amount of amperage will increase if the connections at the work or electrode holder are loose. | show 🗑
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| T/F A stringer bead width should be 2-3 times the electrode diameter. | show 🗑
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| show | T
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| show | F
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| show | T
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| Explain why the flow rate of the shielding gas must be increased when welding in the vertical, horizontal, or overhead positions. | show 🗑
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| Explain how the arc is struck when GMAW or FCAW. | show 🗑
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| What is the difference between semi-automatic welding and automatic welding? | show 🗑
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| How is spatter kept from sticking to the nozzle? | show 🗑
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| What is the typical no-load open circuit voltage of a DC arc welding machine? | show 🗑
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| show | The AC is passed through a rectifier and changed to DC
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| List five functions of the flux coating on a SMAW electrode | show 🗑
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| show | The percentage of time in a ten-minute timeframe that a welding machine can be used at its rated output current
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| How does the welder know what type electrode he/she is using? | show 🗑
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| What is arc blow? | show 🗑
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| show | At the end of the joint the electrode direction is reversed as the electrode is lifted. The finishing crater should be filled just as the arc is broken.
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| Why should a covered electrode never be bent? | show 🗑
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| List at least five factors that the welder must control to obtain a good weld when doing SMAW. | show 🗑
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| show | DCEP DCEN and alternating.
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| What is the constant in TIG, voltage or current? | show 🗑
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| what is the benefit of DCEN in TIG | show 🗑
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| show | increases arc force allowing for better penetration
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| what is the benefit of increasing AC frequency in TIG? | show 🗑
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| show | lowering this value increases the arc width and promotes greater weld penetration
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| show | the torch body, a collet holder and collet , the end cap, and the nozzle
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| what metals would you weld with a green banded electrode? (pure Tungsten) | show 🗑
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| what precautions should be given when shaping a Thoriated tungsten electrode? | show 🗑
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| what does adding 2% Thorium to a tungsten electrode do? | show 🗑
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| what colour band does a 2% Thoriated Tungsten Electrode have? | show 🗑
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| show | Yellow
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| what colour band does a2% Lanthanated Tungsten have? | show 🗑
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| what are the properties of a 2% lanthanated tungsten? | show 🗑
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| show | gold
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| What colour band is 1% Lanthanated | show 🗑
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| What colour band is 2%Ceriated Tungsten | show 🗑
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| show | brown
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| show | is an electrode perfect for both A/C or D/C, they can run for prolonged periods, start well, resist contamination, precision work on thin metals
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| show | used to weld Aluminum and Magnesium where the highest quality is necessary, these tungsten’s replace the pure variety due to higher amperage carrying capability, and they are used with the balled end.
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| show | not more than 200amps
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| water cooled TIG torch amperage range | show 🗑
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| TIG electrode size range | show 🗑
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| show | helps arc jump the gap
Steele turns off, Aluminum stays on
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| show | starts gas flowing before weld starts- clears contaminants
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| show | allow the operator to reconfigure the a/c wave length
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| PPS means? | show 🗑
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| Peak Percentage? | show 🗑
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Created by:
Neeneral