Welding Flashcards

1
Q

What are three general types of welding?

A

Gas
Electric arc
Electric Resistance Welding

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2
Q

What is the purpose of shielding an arc weld with an inert gas ?

A

It prevents the atmosphere oxygen/nitogen from contaminating the weld.

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3
Q

What does the size of the torch tip opening determine?

A

The amount of heat delivered by the torch tip, but not the temperature.

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4
Q

How is a soft flame obtained without reducing termal output?

A

By using a larger tip and adjusting the pressures.

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5
Q

What valve should be turned off first when extinguishing a torch?

A

The acetylene gas valve.

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6
Q

What safety precaution should be taken when gas welding has been completed?

A

Turn off the valves and relieve all pressure.

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7
Q

What is the result of insufficient penetration?

A

The weld will be weak.

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8
Q

What must be done with heat-treated aluminum alloys after a welding repair has been made?

A

It must be reheat treated.

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9
Q

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

A

To have the base metal chemically clean without the slightest film of oxide.

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10
Q

What type of flame is used for silver soldering?

A

A neutral flame or slightly reducing flame.

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11
Q

What must be done in the weld zone to successfully weld titanium?

A

The weld zone must be shielded with an inert gas.

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12
Q

What procedure will control expansion when welding a joint?

A

Tack welding at intervals along the joint.

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13
Q

What type of repair could be made for a dented steel tube cluster joint?

A

Weld a formed steel patch plate over the dented area.

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14
Q

What is the preferred method of welding aluminum?

A

Gas shielded arc welding. (TIG Welding)

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15
Q

What is the preferred method of welding magnesium?

A

Gas shielded arc welding. (TIG Welding)

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16
Q

Which method of welding is less likely to cause buckling or warping of thin metal sheets?

A

TIG Welding.

17
Q

What is a safety hazard associated with welding magnesium?

A

If ignited it is extremely hard to extinguish.

18
Q

What are some advantages of Gas Shielded Arc Welding (TIG WELDING)?

A

Stronger weld, more ductile and more corrosion resistant.

19
Q

What must be done to a soldering iron tip to increase the amount of heat transferred from the tip to the work?

A

The tip must be clean and tinned

20
Q

What technique might be used to enable a tight-fitting inner sleeve to be inserted into a tubular repair?

A

Chilled the inner tube with dry ice and heat the outter tube with a torch. (antagonic process)