Welding Flashcards
What is 7018 also refered to as?
Why is this?
- Low-hydrogen Electrode
- The rods have a flux with very low hydroden content.
What kind of steel is 7018 used with?
Low and medium carbon steel welding.
What does the 70 stand for in 7018?
Strength of 70,000 lbs per square inch
What does the 1 mean in 7018?
Welding position. 1 = all position welding.
What does 8 mean in 7018?
Indicated coating type, penetration, and the types of current that can be employed for the electrode. 8 means low-hydrogen flux mixed with potassium and iron powder compounds and medium penetration quality and works with reverse polarity DC current, DCEP and AC.
Do 7018 rods need to be put in an oven before use?
Yes, the water damagers them.
What can a damaged plasma torch shield cause?
Double Arcing
Where is the safety device for Acetylene located?
On the cylinder
True or False?
Carbon Arc cutting can trim or cut parts that are ferrous and made of some non-ferrous metals.
True
What is the term Porosity used to discribe?
Gas pockets entrapped in the weld.
What is the maximum safe working pressure for Acetylene?
15 psi
Can plasma torches cut non-ferrous metals?
No, ferrous metals only
Which Kerf is wider, Plasma Torch or Oxyacetylene?
Plasma Torch. Two times larger.
What is hissing or squealing in a torch a sign of?
Burnback
What type of flame is used to fusion weld low carbon steel?
Neutral Flame
Answer.
C)
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B)
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B)
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B)
