Welding Certification — Knowledge Practice
Processes: practice questions
Our Welding Knowledge bank has 27 questions on this topic. Here are 5 of them with answers; the full mock exam draws from every topic, like the real one.
Question 1
In GMAW, which metal transfer mode is used for thin metal and out-of-position welding at low heat?
- Globular transfer
- Submerged arc transfer
- Spray transfer at high voltage
- Short-circuit transfer
Show the answer
D. Short-circuit transfer — Spray transfer needs high argon content and high current.
Question 2
Which GMAW transfer mode requires a shielding gas with high argon content (typically over 80%)?
- Dip transfer
- Short-circuit transfer
- Spray transfer
- Globular transfer with 100% CO2
Show the answer
C. Spray transfer — Spray transfer gives smooth, deep welds in the flat and horizontal positions.
Question 3
What happens to penetration in SMAW when amperage is increased (within the electrode's range)?
- Penetration increases
- It has no effect
- Penetration decreases
- The arc goes out
Show the answer
A. Penetration increases — Too high amperage causes undercut and spatter.
Question 4
What is 'backhand' welding?
- Welding behind a screen
- Welding overhead
- Welding with the wrong hand
- Pointing the torch or electrode back at the completed weld while moving forward
Show the answer
D. Pointing the torch or electrode back at the completed weld while moving forward — Also called drag or pull technique.
Question 5
What is the main purpose of the flux coating on an SMAW electrode?
- To make the electrode look better
- To prevent the electrode core wire from melting before it reaches the arc
- To conduct electricity
- To shield the weld, stabilise the arc and add alloys or slag
Show the answer
D. To shield the weld, stabilise the arc and add alloys or slag — The slag protects the cooling weld.