Manual Metal Arc M.M.A (Leaving Cert Engineering): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What is an electric arc in welding?
What is an electric arc in welding?
Electricity jumping across a gap
What temperature can the electric arc reach in welding?
What temperature can the electric arc reach in welding?
Over 3,000°C
What type of welding process is MMA welding?
What type of welding process is MMA welding?
Skilled manual process
What voltage does the transformer reduce from to in MMA welding?
What voltage does the transformer reduce from to in MMA welding?
What happens if any component is missing from the MMA welding circuit?
What happens if any component is missing from the MMA welding circuit?
No current flows, no welding occurs
What is the electrode in MMA welding?
What is the electrode in MMA welding?
A metal rod covered with flux coating
What are the two main functions of the flux coating?
What are the two main functions of the flux coating?
Creates gas shield & forms slag
What does the protective gas shield prevent during welding?
What does the protective gas shield prevent during welding?
Atmospheric contamination & porosity
What is the purpose of the slag layer on the weld?
What is the purpose of the slag layer on the weld?
Helps weld cool slowly, prevents brittleness
Why must welding stations be kept completely dry?
Why must welding stations be kept completely dry?
To prevent electrical accidents & shock
Which tool is used to remove slag after welding?
Which tool is used to remove slag after welding?
Chipping hammer
What type of material is MMA welding particularly suitable for?
What type of material is MMA welding particularly suitable for?
Mild steel plates