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A&P Airframe Oral Practice Questions > Welding > Flashcards

Welding Flashcards

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

Butt welds

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2
Q
  1. Why must all flux be removed from the metal after welding magnesium?
A

Flex left will cause severe corrosion

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3
Q
  1. What must be done to successfully weld titanium?
A

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

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4
Q
  1. What is gas shielded arc welding?
A

Gas covers the weld to protect from atmosphere

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5
Q
  1. What are the advantages of gas shielded arc welding?
A

Stronger weld, more ductile, corrosion resistant weld

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6
Q
  1. What shielding gasses are used for gas tungsten arc (TIG) welding?
A

Helium or Argon

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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

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8
Q
  1. What is meant by a soft flame?
A

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

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9
Q
  1. When gas welding, what should be turned off first?
A

“A” before “O”
Acetylene before oxygen

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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

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11
Q
  1. What is the function of flux when used in soldering?
A

Flux erodes corrosion from surface and creates strong bond

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12
Q
  1. Why must acid core solder never be used on electrical wire?
A

Acid flux causes severe corrosion to the wire

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13
Q
  1. What is the advantages of gas shielded arc welding over gas welding?
A

Less buckling & warping

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14
Q
  1. What is brazing?
A

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

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15
Q
  1. What is one method of controlling expansion when welding a joint?
A

Tack weld at intervals along the joint

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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?
A

15psi

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?
A

Neutral

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
Q
  1. Name some types of welding?
A

Oxyacetylene
Gas shielded
Brazing
Arc
Plasma

26
Q
  1. How do you determine the correct size filler rod to be used in welding?
A

Diameter of rod governed by thickness of metals

A&P Airframe Oral Practice Questions (17 decks)

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