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A&P - Airframe > Welding > Flashcards

Welding Flashcards

1
Q

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

A

prevent the formation of oxides in the puddle

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2
Q

Which statement best describes magnesium welding?

A

Filler rod should be the same composition as base metal

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

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3
Q

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

A

The welded section does not have the same strength as the original metal

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4
Q

The oxyacetylene flame for silver soldering should be

A

neutral

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5
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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6
Q

Engine mounts members should preferably be repaired by using a

A

larger diameter tube with fishmouth and rosette welds

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7
Q

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

A

Welded patch plate

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8
Q

Welding over brazed or soldered joints is

A

not permitted

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9
Q

Which statement concerning soldering is correct?

A

Joints in electric wires to be soldered should be mechanically secure prior to soldering

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10
Q

Silver, tin, and lead are used in electrical soldering for what reason?

A

Corrosion properties

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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

Which of the following 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 considerations when selecting welding rods are

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

17
Q

The oxyacetylene flame used for aluminum welding shoud

A

be neutral and soft

18
Q

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

A

cool too rapidly

19
Q

Filing or grinding a welding bead is considered

A

a way to bring about strength reduction in joint

20
Q

Acetylene at a line pressure above 15PSI is

A

dangerously unstable

21
Q

When moving acetylene tanks, what precautions should be observed?

A

Transport upright

22
Q

Cylinders used to transport and store acetylene

A

contain acetone

23
Q

A welding torch backfire may be caused by

A

a loose tip

24
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

25
Q

Where should the flux be applied when oxyacetylene welding aluminum?

A

Painted on the surface to be applied to the welding rod

26
Q

What purpose does flux serve in welding aluminum?

A

Minimizes or prevents oxidation

27
Q

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

A

Reduces internal stresses and assures complete penetration

28
Q

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

A

Slightly carburizing

29
Q

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

A

flux

30
Q

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

A

size of the tip opening

31
Q

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

A

15 PSI (unstable)

32
Q

Oxygen and acetylene cylinders are made from

A

steel

33
Q

High pressure cylinders used to transport and store acetylene must

A

contain acetone

34
Q

When a butt-welded joint is visually inspected for penetration

A

100% of the thickness of the base metal

35
Q

Annealing of aluminum

A

removes the stresses caused by forming

36
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

37
Q

If too much acetylene is used in welding stainless steel

A

the metal will absorb carbon and lose resistance to corrosion

38
Q

The shield gases generally used in Gas Tungsten Arc (GTA) welding of aluminum consist of

A

helium or argon or a mixture of helium and argon

A&P - Airframe (18 decks)

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