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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
_____ used for nonferrous metals.
AC
25
Used for nonferrous an ferrous metals
DCSP and DCRP
26
TIG uses what type of electrode..
Non-consumable metallic
27
TIG can be used on a wide variety of light gauge metals, nod commercial metals up to ___"
1/4
28
TIG welding is commonly used for joining metals in...
The aerospace and aircraft industries
29
Polarity that produces wide and shallow welds...
DCRP
30
Polarity that produces deep and narrow welds
DCSP
31
Polarity that's a combination of DCSP and DCRP...
ACHF
32
Torch used for light gauge metals....
Air cooled
33
Torch used when welding requires amperages over 200amps
Water cooled
34
______ provides directional control for the shielding gas.
Gas nozzles
35
Electrode and filler rod sizes
0.040" , 1/16" , 3/32" , 1/8"
36
Electrodes may be.....
Pure tungsten or alloyed tungsten.
37
2% thorium is used for....
Aircraft & missiles
38
1% thorium is used to...
To weld steel.
39
Sharp point electrode...
DC welding machine
40
Spherical shaped electrode...
AC welding machine
41
The filler rod diameter should be....
The same as the metal thickness
42
Shielding gases can be....
Argon or helium or a mixture of the two.
43
Most popular shielding gas supplied in 300cuft at 200 psi
Argon
44
Rarely used more expensive of the 2 shielding gases in TIG
Helium
45
Flow meter calibration is measure in...
(cfh) cubic feet per hour, (lpm) liters per minute
46
Electrode used for aluminum...
Pure tungsten
47
Electrode used for steels..
1% or 2% thorium
48
Wire stick out for butt joints
1/8"-3/16"
49
Wire stick out for fillet joints..
1/4"-3/8"
50
High frequency should be set to ______ for steels
Start position
51
Hugh frequency should be set to _______ for aluminum..
Continuous
52
If a filler rod is used it should be added every ____.
1/4"
53
Preheat stainless steel to ____-____ to prevent the metal from cooling to quickly..
350-500 degrees
54
________ & __________ is controlled by a switch on the torch body or a foot pedal.
Current & gas flow
55
Produces a cleaning action that removes heavy oxide coating on metals
DCRP
56
Deep and narrow welds
DCSP

Block 6 Mig/tig (2 decks)

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