Chapter 3 Electrodes and Consumables Flashcards
- What is the core wire made of in a SMAW Electrode?
a. Rimmed steel
b. Killed steel
c. High carbon steel
d. Austenific steel
b. Killed steel
- Which of the following is an important function of the SMAW electrode coating?
a. Add hydrogen to the weld
b. Prevent slag removal
c. Protect the molten metal
d. Maintain electrode temperature
c. Protect the molten metal
- Which of the following is an important function of the slag in SMAW electrodes?
a. Control the penetration of the weld bead
b. Control the hydrogen in the weld bead
c. Control the amperage temperature
d. Protect the weld metal from contamination
d. Protect the weld metal from contamination
- Iron oxide is added to the flux in SMAW electrodes to improve the formation of
a. oxides
b. grains
c. gases
d. slag
d. slag
- In the electrode classification E4918-X-HZR, the 49 indicates:
a. 490 MPa
b. 49 MPa
c. 49,000psi
d. 49 kpsi
a. 490 MPa
- In the electrode classification E4918-X-HZR, the HZ indicates:
a. heat resistance of electrode
b. heat affective zone
c. diffusible hydrogen designator
d. welding position
c. diffusible hydrogen designator
- An electrode flux capable of absorbing moisture from the air is?
a. Spongy
b. Water soluble
c. Hydroscopic
d. Hygroscopic
d. Hygroscopic
- When removing an E4918-1-H8R electrode from its original container for use, is there any special care required?
a. Yes, they should be stored in an electrode oven between 225° - 300 °C for one hour
b. Yes, they should be stored in an electrode oven between 120° - 150 °C while in use
c. No, because they have a low diffusible hydrogen designation of H8
d. No, this is not recommended
b. Yes, they should be stored in an electrode oven between 120° - 150 °C while in use
- The helix of a solid wire electrode refers to the:
a. spool, coil, or drum in which the electrode wire is packaged
b. diameter that a single loop assumes when a length is cut and placed unrestricted on a flat surface
c. maximum distance from any point on the wire to the flat surface when a single unrestrained loop is placed on that surface
d. wander of the electrode as it leaves the contact tip due to an excessive electrode stick out
c. maximum distance from any point on the wire to the flat surface when a single unrestrained loop is placed on that surface
- What alloy elements used for deoxidizing, are added to solid carbon steel GMAW wires and GTAW rod?
a. Manganese and silicon
b. Aluminum and magnesium
c. Nickel and copper
d. Manganese and magnesium
a. Manganese and silicon
- What is the Canadian classification for an AWS A5.18 ER70S-6 classification wire electrode?
a. 8-G 49A 3 C G6
b. 8-G 49A 2 C S6
c. 8-G 49A 3 C1 S4
d. 8-G 49A 3 C1 S6
d. 8-G 49A 3 C1 S6
- The classification B-G 49A 3 CI S2 solid electrode adds what alloy elements for multiple deoxidizing?
a. Silicon, manganese, titanium and nickel
b. Zirconium, magnesium, aluminum, fitanium and copper
c. Silicon and magnesium only
d. Silicon, manganese, titanium, aluminum and zirconium
d. Silicon, manganese, titanium, aluminum and zirconium
- What is the difference between FCAW and MCAW wires?
a. FCAW wires have faster welding speeds than MCAW
b. both wires are the same
C. MCAW wires are solid wires and have alloy elements for deoxidizing
d. FCAW wires are comprised of an outer sheath and a core containing fluxing and alloying components and MCAW wires are comprised of metal powders
d. FCAW wires are comprised of an outer sheath and a core containing fluxing and alloying components and MCAW wires are comprised of metal powders
- There are two main types of flux-cored wires:
a. those intended for 100% CO, and those intended with mixed shielding gases
b. those intended for use with external gas shielding, and those operating without gas shielding
c. those intended for globular transfer and those intended for spray transfer
d. those intended for flat welding only and those for horizontal welding only
b. those intended for use with external gas shielding, and those operating without gas shielding
- In the FCAW electrode classification E 49 XT-9MJ-HZ , if the number 1 was entered into the X this would indicate:
a. the electrode is classified for welding in the flat and horizontal positions only
b. the electrode is classified for welding in all positions
c. the electrode is classified for welding in the flat position only
d. the electrode is classified for welding without gas shielding
b. the electrode is classified for welding in all positions
- E49XC-3 type tubular electrodes are:
a. gas shielded flux cored electrodes
b. self-shielded flux cored electrodes
c. metal cored electrodes
d. solid wire electrodes
c. metal cored electrodes
- SAW fluxes function essentially the same as SMAW electrodes, so what is the main function of SAW fluxes?
a. Prevent slag removal from the weld
b. Achieve high travel speeds
c. Add hydrogen to the weld metal
d. Protection of the molten weld metal from the atmosphere.
d. Protection of the molten weld metal from the atmosphere.
- The melting range of SAW fluxes is below that of the weld metal. What is the typical melting range temperatures of the slag
a. 500 °C to 1000 °C
b. 1100 °C to 1200 °C
c. 1200 °C to 1300 °C
d. 400 °C to 600 °C
b. 1100 °C to 1200 °C
- Agglomerated fluxes have a lower density than fused fluxes, and less flux is used in the welding operation, in typical applications the flux consumption for agglomerated flux is
____________________ less by weight.
a. approximately 30%
b. approximately 20%
c. less than 10%
d. more than 50%
b. approximately 20%
- SAW fluxes that transfer significant amounts of oxygen to the weld are termed:
a. neutral fluxes
b. basic fluxes
c. oxidizing fluxes
d. acidic fluxes
d. acidic fluxes
- In the electrode classification F49A3-EM12K, the 12 indicates:
a. 12% bonded flux
b. 0.12% agglomerated or bonded flux
c. impacts of 27 Joules at -12 °C
d. 0.12% carbon
d. 0.12% carbon
- SMAW electrodes for welding aluminum should be used for:
a. critical applications
b. thick aluminum applications
C. non-critical applications
d. thin aluminum applications
C. non-critical applications
- In the stainless steel electrode classification E308X-16, the number or letter that refers to the flux type is:
a. 308
b. E
c. 1
d. 6
d. 6
- In the electrode classification ERCuSi-A, the CuSi indicates:
a. the electrode has a copper and silicon chemistry
b. the electrode has a cooper aluminum chemistry
c. the electrode has an aluminum bronze chemistry
d. the electrode has a low-fuming brass chemistry
a. the electrode has a copper and silicon chemistry
- What is the primary consideration when selecting hardfacing consumables
a. The process used in welding
b. The type of base metal and shielding gas required
c. The process and shielding gas combination
d. The type of wear to be encountered in service
d. The type of wear to be encountered in service
- How does brazing differ from welding?
a. Brazing is faster than welding
b. Only the base metal melts during the process
C. Only the filler metal melts during the process
d. Brazing can only be performed in the overhead position
C. Only the filler metal melts during the process
- The AWS classification BAg-XX indicates:
a. silver brazing filler metals
b. aluminum brazing filler metals
c. copper brazing filler metals
d. nickel and cobalt brazing filler metals
a. silver brazing filler metals
- What is the range of tensile strength for E4918?
a. 430to490
b. 490to500
c. 480to490
d. 490to650
d. 490to650
- Low alloy steel arc welding electrodes such as E5518-B3 or E5518-C3 can be used for:
a. the same application
b. only when the carbon content is low in the parent material
c. only when the carbon content is high in the parent material
d. B3 is for high-temperature application and C3 for low-temperature application
d. B3 is for high-temperature application and C3 for low-temperature application
- Which one of the following standards is used in Canada for filler materials joining copper and copper alloy in the GTAW, GMAW and PAW processes?
a. AWS A5.7
b. AWS A5.18
c. AWS AS.17
d. AWS A5.20
a. AWS A5.7
