10 Questions
What is the area where the liquid metal mixes called in welding?
Weld pool
What happens to the grain size in the heat affected zone when the heat provided exceeds the recrystallization temperature?
It increases
What protects the weld pool in the weld bead?
Oxide layer
What is the initial grain size of the base plate compared to the grain size in the heat affected zone?
Smaller
What is the area surrounding the weld pool where the temperature gradually increases called?
Heat affected zone
What is the historical development of different welding power units?
Motor generator sets
What is the advantage of using AC for welding?
Reduced risk of magnetic arc blow effect and good oxide breaking performance
What is the minimum Open Circuit Voltage (OCV) required for re-igniting the arc in AC welding?
At least 50V
What complication arises when introducing AC in welding?
The arc will extinguish on each zero crossing
What type of power unit is used at sites without a supply of mains electricity?
Welding generator power units driven by petrol or diesel engines
Test your knowledge of welding with this quiz! Explore topics such as weld pool, bead, heat affected zone, and more. Perfect for welding enthusiasts and those looking to expand their knowledge of metal joining techniques.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
