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Welding > Flux Welding Exam > Flashcards

Flux Welding Exam Flashcards

1
Q

What power source is required for FCAW?

A

Constant Voltage

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2
Q

What drive rolls required for FC?

A

Knurled

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3
Q

What polarity with dualshield? and Innershield?

A

Dual - Reverse DC+

Inner - Straight DC-

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4
Q

What is tensile strength of E81T-1? E10T-1?

A

80,000 and 100,000

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5
Q

E80T - 11 Positions? E81T-11

A

0 = Flat and Horizontal, 1 = All positions - The opposite of stick

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6
Q

What does Voltage control?

A

Arc Size - if you turn up the width and length go up

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7
Q

What does WFS control?

A

Penetration - sending more wire in faster - if you shorten you change the # of arcs

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8
Q

CFH? IPM? WFS or 0/0?

A

Cubic Feet Per Hour, Inches Per Minute and Wire Feed Speed

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9
Q

How much gas pressure with FC GW?

A

35-45

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10
Q

What types of bottles are these two bottles?

A

High Pressure - open them all the way

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11
Q

What travel angle is used with FCAW? Why do you use this one?

A

Drag, because there’s flux and you risk trapping the flux if you push

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12
Q

What is a regulator called when it’s on a machine instead of a bottle?

A

Blow Meter

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13
Q

What does T stand for? S?

A

Tubular and Solid

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14
Q

What are the 4 consumables and what do they do?

A

Diffusor - Holds everything together
Insulator - Protects you from the current
Contact Tip - carries current into electrode/wire
Nozzle - Use w/ gas because it forces gas over the weld

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15
Q

What causes porosity?

A

Gas coverage not on the weld, like welding from too high.

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16
Q

What is the AWS electrode classification for FCAW - G and FCAW - S

A

G is E71T-1 and S is E71T-11

17
Q

What drive roll tension is used for FCAW?

A

3 to 4/ A lil grey showing/ As little as possible

18
Q

What does FCAW-S and FCAW-G stand for?

A

Flux Core Arc Welding - Self Shield (Innershield)

Flux Core Arc Welding - Gas Shield (Dual Shield)

19
Q

What are the 2 drive roll types?

A

Smooth and Knurled

20
Q

What 2 gases can be used with FCAW - G?

A

75/25 or 100% CO2

21
Q

Define bird nesting.

A

Wire caught in the drive roll system

22
Q

What is the most common cause of bird nesting?

A

Clogged contact tip

23
Q

Which shielding gas gives you the least amount of penetration? Which gives the most? Which is the most common and why? What are some differences?

A

75/25, 100% CO2 - and 100% CO2 because it’s cheap, it produces the most penetration, creates a very aggressive arc and produces lotsof sparks and BB’s

75/25 is more stable arc than 100% CO2 - prettier

24
Q

What happens if you use a smooth roll on flux core wire? Why would you use knurled?

A

It will crush the wire then cause you to bird nest. Knurled gives you more traction with less tension.

25
Q

What’s the difference between travel and work angle?

A

Travel angle is drag or push, that’s it. Work angle is the degreed angle

26
Q

Why do you use DC+ for Gas Shield?

A

Straight Polarity puts approx 70% of heat on the part and 30% is on the electrode, Reverse or DC+ is the opposite putting 70% of heat on the electrode and 30% on the part - the electrode can stand up to it

DC- less penetration and DC+ more penetration

27
Q

Why do you use a gas with Flux and Mig gas wires? What two types of gasses are there and give examples.

A

It protects it from the enviornment -
Inert and Reactive -
Inert - Argon + Helium
Reactive - CO2 and Oxygen

28
Q

What is depostion? What do you balance it with?

A

How much metal you’re putting down - you balance this with penetration.

29
Q

FCAW - G Settings and some details

A 
Constant Voltage
DC+
Knurled
3/4
75/25 or CO2
23- 24 Volts / 300 IPM
35-45 CFH - Open All The Way

E71T-1

High deposition but can’t do outside, easy in flat but hard in other position

30
Q

FCAW - S Settings?

A 
Constant Voltage
DC-
Knurled
3/4
18 - 19 Volts / 125 - 150 IPM

E71T-11

Welding (1 decks)

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