Line E

Question 1

What is the recommended shading number for welding GMAW at 175 amperes?

A) Shade 10
B) Shade 11
C) Shade 12
D) Shade 13

Answer 1

B) Shade 11

Question 2

For applications requiring a high deposition rate, what is the minimum amount of argon gas needed to achieve axial spray transfer?

A) 50%
B) 75%
C) 85%
D) 100%

Answer 2

C) 85%

Question 3

What gas can be used to improve arc stability when using FCAW?

A) Argon
B) C02
C) Nitrogen
D) Helium

Answer 3

B) C02

Question 4

In MCAW, what is the main component of the core chemistry?

A) Flux
B) Silicon
C) Chromium
D) Iron powder

Answer 4

D) Iron Powder

Question 5

Most wire fed processes use which type of power source?

A) Constant potential, Constant Current (CC) power source

B) Constant Potential, Constant Voltage (CV) power source

D) Constant Current, Constant Voltage (CV) power source

Answer 5

B) Constant Potential, CV power source

Question 6

Which variable in arc welding melts the electrode?

A) Voltage
B) Current
C) Slope
D) Inductance

Answer 6

B) Current

Question 7

What is the most significant advantage of an inverter power source?

1) Higher operating frequency is accomplished with less iron core and windings.

2) Lower operating frequency is accomplished with more iron core and windings.

3) Alternating current is rectified by a transformer with a larger iron core.

4) Alternating current is rectified by a
transformer with an iron core with more internal windings.

Answer 7

1) Higher operating frequency is accomplished with less iron core and windings.

Question 8

What is an advantage of a water cooled gun?

A) preferable for light gauge materials?
B) Most cost effective
C) consumables will last longer
D) More versatile in confined spaces

Answer 8

C) Consumables will last longer

Question 9

In GMAW the gun gets hot. All welding parameters are checked and everything is working accordingly. What is to be done to fix this problem?

A) turn up gas
B) switch to a water cooled gun
C) switch to a self shielding gun
D) have a large fan blow cool air over the gun and weld

Answer 9

B) Switch to a water cooled gun

Question 10

What is the purpose of a drive roll?

A) to contact the wire and establish an electrical current
B) grip the wire and push it through the liner
C) guide the wire through the contact tube
D) To support the wire according to the wire shape and drive roll.

Answer 10

B) grip the wire and push it through the liner

Question 11

What GMAW process provides the most pentration?

A) Push technique
B) forehand techniques
C) Drag technique
Backhand technique

Answer 11

C) Drag technique

Question 12

Which variable in GMAW controls the arc length in achieving a wide flag bead?

A) Amperage
B) Voltage
C) Wire Feed Speed
D) Travel Speed

Answer 12

B) Voltage

Question 13

What does the “G” stand for in ER70S-G?

A) GMAW
B) Gas
C) Groove
D) General

Answer 13

D) General

Question 14

What is the CSA filler metal wire tensile strength based on?

A) Kpi
B) psi
C) MPa
D) KPa

Answer 14

C) MPa (megapascal)

Question 15

What is the range at which peak current should be established in GMAW-P?

A) above what is required for spray transfer
B) Above Globular
C) Just below spray transfer
D) Just below globular

Answer 15

A) above what is required for spray transfer

Question 16

What is the most common shielding gas used in FCAW-G

1) 100% Ar.
2) 100% СОг
3)75%Ar/25%CO2
4) 95% Ar/5% 03

Answer 16

3) 75% Ar/25% CO2

Question 17

Which characteristics of MCAW permits higher deposition rates than most other welding processes?

1) The use of high wire feed speeds and the addition of iron powder in the wire core.
2) The use of larger diameter wires and faster wire feed speeds.
3) The use of hotter shielding gasses and all position welding.
4) The addition of fluxing agents and
alloying elements in the wire core

Answer 17

1) The use of high wire feed speeds and the addition of iron powder in the wire core.