Review Questions - FCAW Flashcards

Flux Core Arc Welding

1
Q

What is the difference between FCAW and GMAW?

  1. FCAW requires external shielding gas
  2. GMAW uses a tubular electrode
  3. GMAW requires external shielding gas
  4. FCAW is better for non-ferrous metals
A

GMAW requires external shielding gas

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

A “49” in the FCAW electrode classification E491 T3 indicates;

  1. shielding gas requirements
  2. tensile strength
  3. positions of useability
  4. for vertical-down only
A

tensile strength

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

there are three groups of tubular electrodes:

  1. self shielded, gas shielded, and metal cored
  2. self shielded, rutile, and basic
  3. rutile, basic, and cellulosic
  4. gas shielded, rutile, and basic
A

self shielded, gas shielded, and metal cored

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Why is the shielding gas composition an important variable in FCAW/MCAW?

  1. FCAW always requires shielding gas
  2. the flow controls cooling rate
  3. weld properties are affected
  4. MCAW produces its own protection
A

weld properties are affected

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Basic FCAW electrodes can have lower operator appeal due to the flux system. Why are they used?

  1. lower hydrogen weld metal than rutile type
  2. higher hardness than metal cored type
  3. better out-of-position capability than rutile type
  4. greater selection of readily available diameters
A

lower hydrogen weld metal than rutile type

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is a normal eletrode extension for FCAW-S?

  1. 5-10 mm (1/4 - 3/8 in)
  2. 10-19 mm (3/8 - 3/4 in)
  3. 19-30 mm (3/4 - 1 1/4 in)
  4. 38-62 mm (1 1/2 - 2 1/2 in)
A

38-62 mm (1 1/2 - 2 1/2 in)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What type of roller is best suited for Flux core electrodes?

  1. U grooved
  2. V grooved
  3. knurled drive
  4. X-spine drive
A

knurled drive

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

According to CSA W48-01, in what welding position would an E492T-5 electrode be used?

  1. all position
  2. overhead only
  3. flat groove welds and flat & horizontal fillets
  4. vertical down only
A

flat groove welds and flat & horizontal fillets

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Which statement is the most correct regarding penetration?

  1. self-shielded electodes do not penetrate as deeply as gas shielded wires
  2. eliminating bevelled edges and increasing weld amperage will give better penetration
  3. penetration is controlled by using lower voltages and slower travel speeds
  4. gas shielded wires do not penetrate as deeply as self-shielded electrodes
A

self-shielded electodes do not penetrate as deeply as gas shielded wires

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Compared to GMAW and SMAW, self-shielded tubular electrodes produce what?

  1. greatest amount of fume particulates
  2. weld deposites free of slag
  3. the lease amount of fumes
  4. less visible light to the operator
A

greatest amount of fume particulates

How well did you know this?
1
Not at all
2
3
4
5
Perfectly