Welding Flashcards

(26 cards)

1
Q
  1. What type of weld joint must be used to weld magnesium?
A

Butt welds

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q
  1. Why must all flux be removed from the metal after welding magnesium?
A

Flex left will cause severe corrosion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q
  1. What must be done to successfully weld titanium?
A

Inert gas shield work zone
(Inert gas Helium or Argon)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q
  1. What is gas shielded arc welding?
A

Gas covers the weld to protect from atmosphere

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q
  1. What are the advantages of gas shielded arc welding?
A

Stronger weld, more ductile, corrosion resistant weld

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q
  1. What shielding gasses are used for gas tungsten arc (TIG) welding?
A

Helium or Argon

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q
  1. What determines the amount of hear that will be applied to the work when welding by the oxyacetylene method?
A

Torch tips orifice size or diameter

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q
  1. What is meant by a soft flame?
A

torch flame is adjusted to make no noise & doesn’t push the weld

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q
  1. When gas welding, what should be turned off first?
A

“A” before “O”
Acetylene before oxygen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q
  1. What will be the result of using a torch tip that is too large or too small.
A

Too large - heat will be too great
Too small - heat wont penetrate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q
  1. What is the function of flux when used in soldering?
A

Flux erodes corrosion from surface and creates strong bond

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q
  1. Why must acid core solder never be used on electrical wire?
A

Acid flux causes severe corrosion to the wire

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q
  1. What is the advantages of gas shielded arc welding over gas welding?
A

Less buckling & warping

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q
  1. What is brazing?
A

Material bonding process that uses non ferrous metal (lower temp) to join metal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q
  1. What is one method of controlling expansion when welding a joint?
A

Tack weld at intervals along the joint

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q
  1. Why is it especially desirable to use a soft flame when welding aluminum?
A

Avoid blowing holes in metal when puddle is formed

17
Q
  1. What fuel is used for gas welding aluminum?
A

Oxygen & hydrogen

18
Q
  1. What is the purpose of using flux when welding aluminum?
A

Remove aluminum oxide by chemically combining it

19
Q
  1. What is the maximum safe pressure for acetylene gas when welding?
20
Q
  1. How can dents at a steel tube cluster joint be repaired?
A

Weld a specially formed steel patch over dented area & tubes

21
Q
  1. What type of flame should the used when silver soldering?
22
Q
  1. What are the procedures for preparing a metal fuel tank for welding?
A

Wash with hot water & detergent
Steam cleaned least 30 min
Fill with CO2 gas & seal tank except small vent hole

23
Q
  1. When splicing tubing by the inner sleeve method, what method can be used to insert a tight-fitting inner sleeve into the replacement tube?
A

Chill inner sleeve
Heat outer sleeve

24
Q
  1. Why is flux used on silver solder?
A

Cleans base metal of oxide ensures good bond

25
26. Name some types of welding?
Oxyacetylene Gas shielded Brazing Arc Plasma
26
11. How do you determine the correct size filler rod to be used in welding?
Diameter of rod governed by thickness of metals