Oxy Acetylene Torch Fundamentals

What is the correct sequence for lighting an oxy-acetylene torch?

• Open the acetylene valve, ignite the flame, then open the oxygen valve.

• Open the oxygen valve, ignite the flame, then open the acetylene valve.

• Ignite the flame, then open both the acetylene and oxygen valves simultaneously.

• Open both the acetylene and oxygen valves, then ignite the flame.

Which of the following is a critical safety precaution when using an oxy-acetylene torch?

• Use the torch in a confined space to concentrate the heat.

• Wear loose clothing to allow for better movement.

• Check for leaks in hoses and connections before use.

• Store acetylene cylinders horizontally.

What is the ideal gas mixture ratio for cutting steel with an oxy-acetylene torch?

• 1:1

• 1:2

• 1:3

• 1:4

Which cutting method is most suitable for making straight cuts in thick steel plates?

• Freehand cutting

• Bevel cutting

• Machine cutting

• Gouging

How often should the hoses of an oxy-acetylene torch be inspected for wear and damage?

• Daily

• Weekly

• Monthly

• Annually

What is the primary purpose of a flashback arrestor in an oxy-acetylene setup?

• To increase the pressure of the gases.

• To prevent the flame from traveling back into the hoses.

• To mix the gases more efficiently.

• To reduce the noise of the torch.

Which of the following is NOT a recommended practice for maintaining oxy-acetylene equipment?

• Regularly clean the torch tip.

• Use oil to lubricate the regulator.

• Store cylinders in an upright position.

• Replace worn-out hoses immediately.

What is the effect of using too much oxygen in the gas mixture when cutting metal?

• It produces a cleaner cut.

• It causes the metal to melt rather than cut.

• It increases the risk of backfire.

• It reduces the cutting speed.

Which of the following is a sign that the torch tip needs cleaning?

• The flame is too short.

• The flame is too blue.

• The flame is sputtering or popping.

• The flame is too quiet.

What should be done if a flashback occurs while using an oxy-acetylene torch?

• Increase the gas pressure immediately.

• Turn off the oxygen valve first, then the acetylene valve.

• Turn off the acetylene valve first, then the oxygen valve.

• Continue working as normal.