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a) (i) Explain the function of part A and the function of part B for the oxy-acetylene torch shown - Leaving Cert Engineering - Question 4 - 2022
Question 4
a) (i) Explain the function of part A and the function of part B for the oxy-acetylene torch shown. Part A is the welding nozzle, it has a single hole and helps dir... show full transcript
Worked Solution & Example Answer:a) (i) Explain the function of part A and the function of part B for the oxy-acetylene torch shown - Leaving Cert Engineering - Question 4 - 2022
Step 1
Function of part A and part B:
Answer
Part A is the welding nozzle, which has a single opening to direct the oxy-acetylene gas mixture at the welding spot. Different sizes of welding nozzles allow for varying flame sizes, enabling better control over the weld. Part B is a valve that regulates gas flow to the torch by opening and closing through turning, controlling the amount of gas that mixes in the torch.
Step 2
Step 3
Explain the function of the gas regulator in oxy-acetylene welding:
Answer
The gas regulator's primary purpose is to reduce the high-pressure gas from the cylinder to a lower, usable level before it reaches the torch. It features two gauges: one displays the pressure of gas being sent to the torch and the other shows the pressure inside the gas cylinder.
Step 4
Describe the purpose of any three of the following in manual metal arc welding:
Answer
(i) Earth clamp: The earth clamp completes the electric circuit during welding, ensuring safety by preventing electrical shock.
(ii) Welding helmet: Protects the welder's eyes and skin from harmful radiation and bright light emitted during the welding process.
(iii) Electrode holder: Holds the welding electrode securely to allow its use in the welding process safely, as it is insulated to prevent electric shock.