Question 1

Why is the water pressure on water cooled torches kept below 35 psi (241 kg/mm2)?

Accepted Answer

A)  To limit the amount of water that is wasted. 
B)  To slow the flow of water through the gun. 
C)  Higher pressures produce higher water flows, and that can cool the welding too much so it would be harder to get a stable arc. 
D)  Higher water pressures can burst the hoses. 
A)  To limit the amount of water that is wasted. 
B)  To slow the flow of water through the gun. 
C)  Higher pressures produce higher water flows, and that can cool the welding too much so it would be harder to get a stable arc. 
D)  Higher water pressures can burst the hoses.

Question 2

Which of the following is true of fluxes?

Accepted Answer

A)  Fluxes cause undercutting along the junction of the weld and the base metal. 
B)  Fluxes decrease the stability of the arc. 
C)  Fluxes provide oxidation. 
D)  Fluxes are slag formers. 
A)  Fluxes cause undercutting along the junction of the weld and the base metal. 
B)  Fluxes decrease the stability of the arc. 
C)  Fluxes provide oxidation. 
D)  Fluxes are slag formers.

Question 3

The addition of ____ gives FCAW the high level of reliability needed for welding on boilers, pressure vessels, and structural steel.

Accepted Answer

A)  flux 
B)  small diameter electrodes 
C)  slags 
D)  bevels 
A)  flux 
B)  small diameter electrodes 
C)  slags 
D)  bevels

Question 4

____________________ may convert small amounts of surface oxides like mill scale back into pure metal.

Accepted Answer

The answer of ____________________ may convert small amounts of surface...

Question 5

Atmospheric contamination of molten weld metal occurs ____.

Accepted Answer

A)  as it travels across the arc gap and within the pool before it solidifies 
B)  after it solidifies 
C)  infrequently 
D)  when the atmosphere reacts with the flux inside the electrode 
A)  as it travels across the arc gap and within the pool before it solidifies 
B)  after it solidifies 
C)  infrequently 
D)  when the atmosphere reacts with the flux inside the electrode

Question 6

What can be added to FCAW electrode fluxes to remove oxides?

Accepted Answer

A)  Deoxidizers 
B)  Arc stabilizers 
C)  Alloying elements 
D)  Slag formers 
A)  Deoxidizers 
B)  Arc stabilizers 
C)  Alloying elements 
D)  Slag formers

Question 7

When the electrode provides all of the shielding, it is called ____.

Accepted Answer

A)  protective 
B)  rutile 
C)  a shielding gas 
D)  self-shielded 
A)  protective 
B)  rutile 
C)  a shielding gas 
D)  self-shielded

Question 8

What can be added to FCAW electrode fluxes to affect the arc resistance?

Accepted Answer

A)  Deoxidizers 
B)  Arc stabilizers 
C)  Alloying elements 
D)  Slag formers 
A)  Deoxidizers 
B)  Arc stabilizers 
C)  Alloying elements 
D)  Slag formers

Question 9

How is the amperage adjusted on an FCA welding machine?

Accepted Answer

A)  By changing the voltage setting on the welder. 
B)  You move the welding lead from one amperage setting to the next amperage setting. 
C)  Changes in the wire feed speed automatically change the amperage. 
D)  The amperage is pre-set by the electrician and cannot be adjusted in the shop. 
A)  By changing the voltage setting on the welder. 
B)  You move the welding lead from one amperage setting to the next amperage setting. 
C)  Changes in the wire feed speed automatically change the amperage. 
D)  The amperage is pre-set by the electrician and cannot be adjusted in the shop.

Question 10

The electrode classification E70T-10 can have some optional identifiers added to the end of the number such as E70T-10MJH8. Explain the meaning of the optional identifiers, MJH8 .

Accepted Answer

The electrode classification E70T-10 can

Question 11

____ helps the weld by protecting the hot metal from the effects of the atmosphere.

Accepted Answer

A)  Slag 
B)  Heat 
C)  Oxides 
D)  Gas-forming agents 
A)  Slag 
B)  Heat 
C)  Oxides 
D)  Gas-forming agents

Question 12

Summarize the advantages and disadvantages of the backhand technique.

Accepted Answer

The advantages of the backhand welding t

Question 13

FCA welding guns are available as water-cooled or air-cooled. The ____________________-cooled gun is more efficient at removing waste heat.

Accepted Answer

The answer of FCA welding guns are available as water-cooled...

Question 14

From 75% to 90% of the weight of ____ electrodes is metal, whereas ____ electrodes have a maximum of 75% filler metal.

Accepted Answer

A)  large diameter, small diameter 
B)  SMAW, FCAW 
C)  FCAW, SMAW 
D)  small diameter, large diameter 
A)  large diameter, small diameter 
B)  SMAW, FCAW 
C)  FCAW, SMAW 
D)  small diameter, large diameter

Question 15

____ rapidly expand and push the surrounding air away from the molten weld pool.

Accepted Answer

A)  Oxides 
B)  Alloying elements 
C)  Slag formers 
D)  Gas formers 
A)  Oxides 
B)  Alloying elements 
C)  Slag formers 
D)  Gas formers

Question 16

FCA welding deposition rates of more than ____ lb/hr of weld metal are possible.

Accepted Answer

A)  10 
B)  15 
C)  25 
D)  50 
A)  10 
B)  15 
C)  25 
D)  50

Question 17

As the percentage of CO2increases in the argon mixture, weld penetration ____________________.

Accepted Answer

Question 18

Which of the following is not a reason to use recirculation cooling water systems on FCA welding systems?

Accepted Answer

A)  To conserve water 
B)  Better gun cooling 
C)  More portable 
D)  Chemicals in the water can prevent freezing 
A)  To conserve water 
B)  Better gun cooling 
C)  More portable 
D)  Chemicals in the water can prevent freezing

Question 19

Which of the following is not an advantage of inverter welding machines?

Accepted Answer

A)  They produce much more internal heat. 
B)  They are more energy efficient. 
C)  They are more accurate when setting voltage and amperage. 
D)  They are much lighter than traditional transformer-type welding machines. 
A)  They produce much more internal heat. 
B)  They are more energy efficient. 
C)  They are more accurate when setting voltage and amperage. 
D)  They are much lighter than traditional transformer-type welding machines.

Question 20

____________________ controls the bead shape by serving as a dam or mold, and also serves as a blanket to slow the weld's cooling rate, which improves its physical properties.

Accepted Answer

The answer of ____________________ controls the bead shape by serving...

Exam 12: Flux Cored Arc Welding Equipment, Setup, and Operation

Why is the water pressure on water cooled torches kept below 35 psi (241 kg/mm2)?

Which of the following is true of fluxes?

The addition of ____ gives FCAW the high level of reliability needed for welding on boilers, pressure vessels, and structural steel.

____________________ may convert small amounts of surface oxides like mill scale back into pure metal.

Atmospheric contamination of molten weld metal occurs ____.

What can be added to FCAW electrode fluxes to remove oxides?

When the electrode provides all of the shielding, it is called ____.

What can be added to FCAW electrode fluxes to affect the arc resistance?

How is the amperage adjusted on an FCA welding machine?

The electrode classification E70T-10 can have some optional identifiers added to the end of the number such as E70T-10MJH8. Explain the meaning of the optional identifiers, MJH8 .

____ helps the weld by protecting the hot metal from the effects of the atmosphere.

Summarize the advantages and disadvantages of the backhand technique.

FCA welding guns are available as water-cooled or air-cooled. The ____________________-cooled gun is more efficient at removing waste heat.

From 75% to 90% of the weight of ____ electrodes is metal, whereas ____ electrodes have a maximum of 75% filler metal.

____ rapidly expand and push the surrounding air away from the molten weld pool.

FCA welding deposition rates of more than ____ lb/hr of weld metal are possible.

As the percentage of CO2increases in the argon mixture, weld penetration ____________________.

Which of the following is not a reason to use recirculation cooling water systems on FCA welding systems?

Which of the following is not an advantage of inverter welding machines?

____________________ controls the bead shape by serving as a dam or mold, and also serves as a blanket to slow the weld's cooling rate, which improves its physical properties.

Introduction to Welding

Safety in Welding

Shielded Metal Arc Equipment, Setup, and Operation

Shielded Metal Arc Welding of Plate

Shielded Metal Arc Welding of Pipe

Shielded Metal Arc Welding Aws Sense Certification

Flame Cutting Equipment, Setup, and Operation

Plasma Arc Cutting Equipment, Setup, and Operation

Related Cutting Processes

Gas Metal Arc Welding Equipment, Setup, and Operation

Gas Metal Arc Welding

Flux Cored Arc Welding

Gas Metal Arc and Flux Cored Arc Welding of Pipe

Gas Metal Arc and Flux Cored Arc Welding Aws Sense Certification

Gas Tungsten Arc Welding Equipment, Setup, and Operation

Gas Tungsten Arc Welding of Plate

Gas Tungsten Arc Welding of Pipe

Gas Tungsten Arc Welding Plate and Pipe Aws Sense Certification

Shop Math and Weld Cost

Reading Technical Drawings

Welding Joint Design and Welding Symbols

Fabricating Techniques and Practices

Welding Codes and Standards

Testing and Inspection

Welding Metallurgy

Weldability of Metals

Filler Metal Selection

Welding Automation and Robotics

Other Welding Processes

Oxyfuel Welding Equipment, Setup, and Operation

Oxyacetylene Welding and Brazing, Braze Welding, and Soldering

Filters

Why is the water pressure on water cooled torches kept below 35 psi (241 kg/mm²)?

From 75% to 90% of the weight of electrodes is metal, whereas electrodes have a maximum of 75% filler metal.

As the percentage of CO₂increases in the argon mixture, weld penetration ____________________.