Pre- Assessment Test--Proper set - up and use of Oxy - Acetylene Torch Systems
1. Oxygen and acetylene cylinders can be used and stored in upright or horizontal position as long as the gauges are removed?
2. When cleaning the value outlet open the value outlet handle ? ( Select all that apply )
1 complete turn
3. The oxygen and acetylene regualtors let you see how much pressure you're using while working, all regulators and cylinders have the same threads and do not require adaptors. ?
4. You can tighten the regulators with you hand, no need for a wrench?
5. Do the following to check proper operation of the regulators. ( Select all that apply )
Close the regulators prior to admitting pressure to them.
Turn the pressure-adjusting screw clockwise to remove the pressure from the spring in the regulator.
Call your supervisor to check proper pressure check verification
Tap the regulator with your finger to see that it moves rather than applying pressure to enter the regulator.
6. Do the following to check for proper regulator pressure. ( Select all that apply )
Adjust the regulators so that you can see the gauges but don't stand in front of the valves.
Open the valves slowly to protect yourself and your machine from any potential combustion.
Open the oxygen valve very slightly at first and pause until the pressure gauge hand isn’t moving any more before moving on to open the valve fully.
Open the acetylene valve 1 and 1/2 turns.
7. Leave the wrench on the acetylene valve while it is open?
8. Use a hose and hose connection specific to welding and cutting. Oygen hoses are red in color and acetylene are blue in color?
9. Do the following to when connecting gas supplies to the torch. ( Select all that apply )
Apply certified lubricant to connections.
Use connection hardware typically used for pipe fitting connections
Do not force connections.
If the threads don't run together easily by hand, either the threads are damaged or the parts aren't meant to go together. Discard the hardware and get the proper hardware.
10. Most torches have 2 oxygen connections because 1 is used for the cutting jet and 1 is used for the preheat flames.
11. Sometimes the torch doesn’t specify which connection is for the acetylene, though the oxygen will be clearly marked. Whichever connection is not for the oxygen is for the acetylene. Double check your connections before moving on to make sure everything is hooked up to the right place.
12. Always tighten the hose connections with a wrench.
13. For the oxygen, turn the pressure-adjusting screw on the regulator until the gauge reads about 25 psi. For the acetylene, turn the pressure-adjusting screw on the regulator until the gauge reads about 10 psi.
14. When testing connections for leaks do the following: ( Select all that apply ).
Apply a leak test solution to valves, regulator connections and hose connections.
Only use solution that is specific to this application.
You can use Ivory soap mixed in water to a thin paste consistency and get the same results.
Use any work brush to apply the solution as long as it is clean and free of oil or gas.
15. When checking the leak - test solution for bubbles the bubbles indicate that either oxygen or acetylene is coming through the connectors and the connection needs to be tightened or reattached completely.
16. You must release all pressure from any system that has a leak and reattach or retighten as needed. Also check for leaking hoses to resolve this issue.
17. When obtaining the correct operating pressure do these checks. ( Select all that apply ).
Turn the oxygen regulator pressure-adjusting screw.
Close the torch oxygen valve.
If you are using a cutting torch, open only the torch cutting oxygen If you are using a cutting attachment valve. Open the oxygen valve on the torch handle and the cutting oxygen valve on the attachment. Don’t set the pressure higher than what the equipment manufacturer recommends.
Kink the hoses with a crimping tool to prevent leakage during this process.
18. When obtaining the correct operating pressure do not exceed 15 psi. Close the acetylene valve immediately after you obtain the right pressure. You shouldn’t open the valve more than 1 full turn. If you open the valve too fast or too far, you may cause the canister to combust.
19. When obtaining the correct operating pressure make sure these conditions are in place. ( Select all that apply ).
Make sure you are working in a well ventilated area.
Keep a charged fire extinguisher in your work space.
Complete our hot work permit checks.
Soak the hoses in water before use.
20. When lighting the flame on the torch do the following steps. ( Select all that apply ).
Check the manufacturer’s instructions for the torch before beginning.
Remember to not have the oxygen gas flowing when you go to light the torch.
Use a friction lighter rather than a match.
Once the black smoke appears, start to increase the acetylene flow back up again just enough to get rid of the black smoke. The flame should still be attached to the tip (it shouldn’t appear as though it has “jumped away” from it). The lighting procedure should result in a neutral flame, which is blue in color and which does not make a hissing sound.
21. If lighting the frame backfire occurs stop working if the flame suddenly goes out? This can happen it the torch comes into direct contact with the metal. If this happens, go ahead and relight the torch again right away. If backfire occurs repeatedly without contact with the work, it may be due to incorrect operating pressures or a loose nozzle in the torch. In this case, check the operating pressures and take a look at the torch to make sure everything is connected properly.
22. Never leave tanks unsecured and in the vertical position, regulators installed when not in use, cylinder valves open. While system is in operation always insure the operating pressures are no higher than the recommended pressures.
Should be Empty: