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Airframe Writtens > Welding > Flashcards

Welding Flashcards

1
Q

In Gas Tungsten Arc (GTA) welding, a stream of inert gas is used to…

A

Prevent the formation of oxides in the puddle.

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2
Q

What statement best describes magnesium welding?

A

Filler rod should be the same composition as base metal.

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3
Q

What statement is true in regard to welding heat-treated magnesium?

A

The welded section does not have the strength of the original metal.

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4
Q

What statement best describes magnesium welding?

A

It can be welded successfully using the same type of joints that are used for aluminum.

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5
Q

The oxyacetylene flame for silver soldering should be…

A

Neutral.

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6
Q

Why is it necessary to use flux in all silver soldering operations?

A

To chemically clean the base metal of oxide film.

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7
Q

Engine mount members should preferably be repaired using a…

A

Larger diameter tube with fishmouth and rosette welds.

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8
Q

What method of repair is recommended for a steel tube longeron dented at a cluster?

A

Welded patch plate.

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9
Q

Welding over brazed or soldered joints is…

A

Not permitted.

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10
Q

What statement concerning soldering is correct?

A

Joints in electric wire to be soldered should be mechanically secure prior to soldering.

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11
Q

A resurfaced soldering iron cannot be used effectively until after the working face has been…

A

Tinned.

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12
Q

What can normally be welded without adversely affecting strength?

A

SAE 4130
chrome/molybdenum tubing.

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13
Q

In selecting a torch tip size to use in welding, the size of the tip opening determines the…

A

Amount of heat applied to the work.

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14
Q

Why should a carburizing flame be avoided when welding steel?

A

It hardens the surface.

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15
Q

The most important consideration(s) when selecting welding rod is…

A

Material compatibility.

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16
Q

When selecting a welding rod, one of the most important factors to consider is to ensure that…

A

The proper AMS number is used.

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17
Q

The oxyacetylene flame used for aluminum welding should…

A

Be neutral and soft.

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18
Q

A very thin and pointed tip on a soldering copper is undesirable because it will…

A

Cool too rapidly.

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19
Q

Filing or grinding a weld bead is considered to be…

A

A way to bring about strength reduction in joint.

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20
Q

Acetylene at a line pressure above 15 psi is…

A

Dangerously unstable.

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21
Q

Cylinders used to transport and store acetylene…

A

Contain acetone.

22
Q

A welding torch backfire may be cause by…

A

A loose tip.

23
Q

What statement concerning a welding process is true?

A

The inert-arc welding process uses an inert gas to protect the weld zone from the atmosphere.

24
Q

What purpose does flux serve in welding aluminum?

A

Minimizes or prevents oxidation.

25
Q

Where should the flux be applied when oxyacetylene welding aluminum?

A

Painted on the surface to be welded and applied to the welding rod.

26
Q

Why are aluminum plates 1/4 inch or more thick usually preheated before welding?

A

Reduces internal stresses and assures more complete penetration.

27
Q

How should a welding torch flame be adjusted to weld stainless steel?

A

Slightly carburizing.

28
Q

Oxides form very rapidly when alloys or metals are hot. It is important, therefore, when welding aluminum to use a…

A

Flux.

29
Q

In gas welding, the amount of heat applied to the material being welding is controlled by the…

A

Size of the tip opening.

30
Q

When welding or cutting, the acetylene pressure gauge should never be set higher than…

A

15 psi.

31
Q

Oxygen and acetylene cylinders are made of…

A

Steel.

32
Q

High pressure cylinders used to transport and store acetylene must…

A

Contain acetone.

33
Q

When a butt-welded joint is visually inspected for penetration, the penetration should be…

A

100 percent of the thickness of the base metal.

34
Q

Annealing of aluminum…

A

Removes stresses caused by forming.

35
Q

Edge notching is generally recommended in butt welding above a certain thickness of aluminum because it…

A

Aids in getting full penetration of the metal and prevents local distortion.

36
Q

If too much acetylene is used in the welding of stainless steel,…

A

The metal will absorb carbon and lose it resistance to corrosion.

37
Q

The shielding gases generally used in the Gas Tungsten Arc (GTA) welding of aluminum consist of…

A

Helium or argon, or a mixture of helium or argon.

38
Q

Why should an aircraft maintenance technician be familiar with weld nomenclature?

A

In order to gain familiarity with the welding technique, filler material, and temperature range used.

39
Q

Identify the weld cause by an excessive amount of acetylene.

A

3

40
Q

Select the illustration which depicts a cold weld.

A

2

41
Q

Why is it considered good practice to normalize a part after welding?

A

To relieve internal stresses developed within the base metal.

42
Q

Holes and a few projecting globules are found in a weld. What action should be taken?

A

Remove all the old weld, and reweld the joint.

43
Q

Which condition indicates a part has cooled too quickly after being welded?

A

Cracking adjacent to the weld.

44
Q

What is a characteristic of a good gas weld?

A

The weld should taper off smoothly into the base metal.

45
Q

One characteristic of a good weld is that no oxide should be formed on the base metal at a distance from the weld of more than…

A

1/2 inch.

46
Q

In examining and evaluating a welded joint, a mechanic should be familiar with…

A

Likely ambient exposure conditions and intended use of the part, along with type of weld and original part material composition.

47
Q

What type weld is shown at A?

A

Butt.

48
Q

What type weld is shown at B?

A

Double butt.

49
Q

What type weld is shown at G?

A

Lap.

50
Q

On a fillet weld, the penetration requirement includes what percentage(s) of the base metal thickness?

A

25 to 50 percent.

Airframe Writtens (34 decks)

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