Deck 10: Flux Cored ARC Welding of Pipe

Question 1

The American Welding Society (AWS)classification for flux cored electrodes is similar to that for the _____ classification. ​

Answer 1

gas metal arc welding

Question 2

Why is the gas metal arc process preferred? ​

Answer 2

The gas metal arc process is preferred because of the speed at which welds can be performed and the ability to control heat input. ​

Question 3

What is the weave technique? ​

Answer 3

The weave technique is a side-to-side zigzag straight across a joint. ​

Question 4

The _____ is the distance from the end of the contact tip to where the wire electrode is melted off. ​

Question 5

Flux cored wires are designed to be welded using no external shielding gas, known as _____. ​

Question 6

Pipe of X70 grade or higher is more sensitive to hydrogen _____. ​

Question 7

Machine welding is when welding is done by equipment that is under constant supervision, monitoring, and control by a _____. ​

A)machine​
B)computer​
C)robot​
D)welding operator​

Question 8

Why is the flux cored process attractive to companies involved in pipe construction? ​

Question 9

_____ tend to result in faster travel speeds and a little less heat input. ​

A)Stringer beads ​
B)Weave beads ​
C)Electrodes​
D)Flux cored wires​

Question 10

The   _____ is the amount of metal that can be deposited in the weld joint in a given unit of time. ​

Question 11

Why is preheating required in the FCAW process? ​

Question 12

It is important to remember to preheat the pipe if the ambient temperature is below _____ especially if the pipe is greater than Schedule 80. ​

A)50°F ​
B)60°F ​
C)70°F ​
D)80°F ​

Question 13

FCAW   is a low- _____ welding process. ​

A)oxygen​
B)carbon​
C)hydrogen​
D)nitrogen​

Question 14

When using the weave technique, movement should be _____. ​

A)relatively fast ​
B)relatively slow
C)up and down​
D)side to side​

Question 15

Regardless of the technique that you use, the _____ systems for flux cored wires will freeze quickly. ​

A)wire​
B)slag​
C)bead​
D)weld pool​

Question 16

Once the _____ is complete, it is important to grind the weld to make sure that there is no cold roll or lack of fusion. ​

A)root pass​
B)GMAW process​
C)FCAW process​
D)hot pass​

Question 17

The _____ process has one of the most efficient deposition rates of all welding processes. ​

A)flux cored​
B)gas metal arc​
C)gas tungsten arc​
D)root pass​

Question 18

Some wires are designed to be welded using an external shielding gas known as _____. ​

A)dual shield ​
B)self-shield ​
C)gas shield ​
D)wire shield ​

Question 19

_____ can help to reduce the amount of preweld cleaning that is necessary. ​

A)Fluxers​
B)Elements​
C)Wires​
D)Deoxidizers​

Question 20

Why has the use of the FCAW process increased for pipe? ​