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Block 6 Mig/tig > Tig > Flashcards

Tig Flashcards

0
Q

Aluminum

Porosity is caused by…

A

Hydrogen

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1
Q

Designed for welding light gauge metals where low current values are used

A

Air-cooled torches

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2
Q

Basic diameters for electrodes are…

A

0.040; 1/16” ; 3/32” ; 1/8”

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3
Q

Provides directional control for the shielding gas and are threaded onto the collet body

A

Gas nozzles

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4
Q

Requires an electrode that’s 4times larger in diameter than that would be used for DCSP at a given amperage.

A

DCRP

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5
Q
  • Recommended when welding requires amperages over 200amps.

- a circulating stream of water flows inside the torch to keep it cool.

A

Water-cooled torches

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6
Q

______&_____ can be used to weld non-ferrous & ferrous metals

A

DCSP & DCRP

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7
Q

Achieved by generating an electric arc between the tungsten electrode and base metal

A

Fusion

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8
Q

_______ can only be used to weld non-ferrous metals

A

AC

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9
Q

Weld puddle is deeper and more narrower than with DCRP

A

DCSP

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10
Q

The diameter of the filler rod should be

A

Same thickness of the metal being welded

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11
Q

The electrode is held into the torch by

A

Collet

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12
Q

Used to prevent air from being pulled into the gas stream

A

Gas Lensing

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13
Q

Used a ________ end when AC welding

A

Spherical (balled)

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14
Q

Used a _________ point with DC welding.

A

Sharp point

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15
Q

Electrodes may be either ______ or a _________.

A

Pure tungsten or a tungsten alloy

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16
Q

You should use ______ or _____ polarity when TIG welding stainless steel.

A

DCeN or ACHF

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17
Q

When welding without filler rod, you must pre-heat the metal to a range of _____-____ to prevent cracking in the weld

A

350-500

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18
Q

Aluminum

Dross is caused by…

A

Oxygen

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19
Q

Combination do DCSP & DCRP meaning one half of the AC cycle is DCSP and the other half is DCRP

A

ACHF

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20
Q

TIG can be used on..

A

Wide variety of light gauge commercial metals up to 1/4”

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21
Q

Welding process in which shielding gas protects the arc between a tungsten electrode and the base metal..

A

Tungsten inert gas

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22
Q

Welding process in which shielding gas protects the arc between a tungsten electrode and the base metal

A

Tungsten inert gas

23
Q

TIG uses a unit supply that produces ____ & _______ & _____.

A

AC , DCSP, DCRP

24
Q

_____ used for nonferrous metals.

A

AC

25
Q

Used for nonferrous an ferrous metals

A

DCSP and DCRP

26
Q

TIG uses what type of electrode..

A

Non-consumable metallic

27
Q

TIG can be used on a wide variety of light gauge metals, nod commercial metals up to ___”

A

1/4

28
Q

TIG welding is commonly used for joining metals in…

A

The aerospace and aircraft industries

29
Q

Polarity that produces wide and shallow welds…

A

DCRP

30
Q

Polarity that produces deep and narrow welds

A

DCSP

31
Q

Polarity that’s a combination of DCSP and DCRP…

A

ACHF

32
Q

Torch used for light gauge metals….

A

Air cooled

33
Q

Torch used when welding requires amperages over 200amps

A

Water cooled

34
Q

______ provides directional control for the shielding gas.

A

Gas nozzles

35
Q

Electrode and filler rod sizes

A

0.040” , 1/16” , 3/32” , 1/8”

36
Q

Electrodes may be…..

A

Pure tungsten or alloyed tungsten.

37
Q

2% thorium is used for….

A

Aircraft & missiles

38
Q

1% thorium is used to…

A

To weld steel.

39
Q

Sharp point electrode…

A

DC welding machine

40
Q

Spherical shaped electrode…

A

AC welding machine

41
Q

The filler rod diameter should be….

A

The same as the metal thickness

42
Q

Shielding gases can be….

A

Argon or helium or a mixture of the two.

43
Q

Most popular shielding gas supplied in 300cuft at 200 psi

A

Argon

44
Q

Rarely used more expensive of the 2 shielding gases in TIG

A

Helium

45
Q

Flow meter calibration is measure in…

A

(cfh) cubic feet per hour, (lpm) liters per minute

46
Q

Electrode used for aluminum…

A

Pure tungsten

47
Q

Electrode used for steels..

A

1% or 2% thorium

48
Q

Wire stick out for butt joints

A

1/8”-3/16”

49
Q

Wire stick out for fillet joints..

A

1/4”-3/8”

50
Q

High frequency should be set to ______ for steels

A

Start position

51
Q

Hugh frequency should be set to _______ for aluminum..

A

Continuous

52
Q

If a filler rod is used it should be added every ____.

A

1/4”

53
Q

Preheat stainless steel to ____-____ to prevent the metal from cooling to quickly..

A

350-500 degrees

54
Q

________ & __________ is controlled by a switch on the torch body or a foot pedal.

A

Current & gas flow

55
Q

Produces a cleaning action that removes heavy oxide coating on metals

A

DCRP

56
Q

Deep and narrow welds

A

DCSP

Block 6 Mig/tig (2 decks)

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