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Airframe > Welding > Flashcards

Welding Flashcards

1
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.

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2
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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3
Q

Which statement best describes magnesium welding?

A

Filler rod should be the same composition as base metal.

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4
Q

What purpose does flux serve in welding aluminum?

A

Minimizes or prevents oxidation.

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5
Q

A welding torch backfire may be caused by

A

A loose tip

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6
Q

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

A

Cool too rapidly

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7
Q

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

A

Amount of heat applied to the work

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8
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.

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9
Q

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

A

Slightly carburizing

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10
Q

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

A

Tinned

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11
Q

Cylinders used to transport and store acetylene

A

Contain acetone

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12
Q

Welding over brazed or soldered joints is

A

Not permitted

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13
Q

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

A

The proper AMS specification number is used

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14
Q

Engine mount members should preferably be repaired by using a

A

Larger diameter tube with fish-mouth and rosette welds.

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15
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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16
Q

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

A

Material compatibility

17
Q

in gas welding, the amount of heat applied to the material being welded is controlled by the

A

Size of the tip opening

18
Q

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

A

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

19
Q

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

A

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

20
Q

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

A

Prevent the formation of oxides in the puddle.

21
Q

Why should a carburizing flame be avoided when welding steel?

A

It hardens the surface

22
Q

High pressure cylinders used to transport and store acetylene must

A

Contain acetone

23
Q

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

A

15 PSI

24
Q

Annealing of aluminum

A

Removes stresses caused by forming

25
Q

Which 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.

26
Q

Which of the following can normally be welded without adversely affecting strength?

1) Aircraft bolts
2) SAE 4130 chrome/molybdenum tubing
3) Spring steel struts
4) Most heat-treated steel/nickel alloy components

A

2

27
Q

When a butt welded joint is visually inspected for penetration

A

100 percent of the thickness of the base metal

28
Q

Acetylene at a line pressure above 15 PSI is

A

Dangerously unstable

29
Q

Which statement best described magnesium welding?

A

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

30
Q

The oxyacetylene flame used for aluminum welding should be

A

Neutral

31
Q

Which statement concerning soldering is correct?

A

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

32
Q

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

A

Reduces internal stresses and assures more complete penetration.

33
Q

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

A

Reduces internal stresses and assures more complete penetration.

34
Q

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

A

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

35
Q

Oxygen and acetylene cylinders are made of

A

Steel

36
Q

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

A

Welded patch plate

37
Q

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

A

Flux

Airframe (17 decks)

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