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Describe the purpose of any three of the following in manual metal arc welding: (i) Earth clamp, (ii) Welding helmet, (iii) Electrode holder, (iv) Welding curtain. - Leaving Cert Engineering - Question b - 2022
Question b
Describe the purpose of any three of the following in manual metal arc welding: (i) Earth clamp, (ii) Welding helmet, (iii) Electrode holder, (iv) Welding curtain.
Worked Solution & Example Answer:Describe the purpose of any three of the following in manual metal arc welding: (i) Earth clamp, (ii) Welding helmet, (iii) Electrode holder, (iv) Welding curtain. - Leaving Cert Engineering - Question b - 2022
Step 1
(i) Earth clamp
Answer
The earth clamp is a critical component in manual metal arc welding as it forms the circuit needed for welding. It securely clamps onto the workpiece, ensuring a reliable electrical connection. When the welding electrode creates the arc, the earth clamp closes the circuit, allowing current to flow effectively and enabling the welding process to take place.
Step 2
(ii) Welding helmet
Answer
A welding helmet serves as protective gear for the welder. It shields the eyes and skin from harmful exposure to bright sparks, ultraviolet light, and infrared rays emitted during the welding process. This protection is essential to prevent burn injuries and long-term damage to vision caused by exposure to high-intensity light.
Step 3
(iii) Electrode holder
Answer
The electrode holder is an essential tool used to grip the electrode during welding. It features an insulated handle to protect the welder from electrical shock, allowing the welder to safely maneuver and position the electrode without direct contact. This device provides stability and control, facilitating precise welding operations.