Electric Welders at Hog Island about 1918.
Courtesy of the National Archives and Records Administration
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Safety Quiz Answer Sheet

Since we know you're just itching to know which answers you got wrong, here's the answer sheet!

1. What is one of three components that makes up the fire triangle needed for combustion to take place?

Answer: Any of the Above (Oxygen, Fuel and/or Kindling Temp)

2. Which of these is a device used to stop an internal fire in the oxy-fuel system?

Answer: Flashback Arrestor

3. Compressing high pressure oxygen can produce high temperatures in the regulator and is known as the:

Answer: Heat of Recompression

4. What is the minimum acetylene cylinder volume capacity (size) for a tip that consumes 20 cubic feet of acetylene per hour?

Answer: 140 cubic feet

5. Name an element that if present in a regulator may cause it to burn out or explode:

Answer: Oil (also, dust and debris but they weren't on the list!)

6. What safety device should always be nearby when operating a torch?

Answer: fire extinguisher (hard hat, really??)

7. Gas starvation in the torch flame will cause the tip to do what?

Answer: Overheat

8. Identify a device that is used to stop gases from flowing the wrong direction in the oxy-fuel system.

Answer:Check Valves

9. Name a reason for gas starvation to take place in an oxy-fuel tip:

Answer: Any/All of the Above (lack of pressure, lack of flow, insufficient cylinder capacity)

10. Identify one of two ways that oxygen can affect combustion:

Answer: Both A and B (Increases Flame Temperature and Lowers Kindling Temperature)

11. It is necessary to inspect a cylinders valve for gas leakage?

Answer: True

12. A propane regulator may be used on an acetylene tank.

Answer: False

13. Regulator adjusting screws should be turned out (OFF) before opening the cylinder valves.

Answer: True

14. It is necessary to leak test an oxy-fuel system each time components are removed or installed.

Answer: True

15. Purging the hoses before lighting the torch need only be performed when the equipment is used the first time at the beginning of the day.

Answer: False

16. Acetylene tanks should not be stored in the horizontal position.

Answer: True

17. Oxygen itself does not burn.

Answer: True

18. Oxygen not fuel is responsible for most oxy-fuel accidents.

Answer: True

19. It is safe to use lubricants on oxy-fuel cylinder regulators.

Answer: False

20. Acetylene gas is heavier than air.

Answer: False

21.Sparks can be dispersed up to 50 feet with a cutting torch.

Answer: True

22. Check Valves will stop a flashback fire.

Answer: False

23. Flashback arrestors and/or check valves will not restrict gas flow.

Answer: False

24. Recompressing high purity oxygen can produce temperatures of up to 1700°F in the regulator.

Answer: True

25. Cylinder oxygen may be used as a substitute for air.

Answer: False

26. Oxygen and air are basically the same thing.

Answer: False

27. Propane gas is heavier than air and if leaked from the system may accumulate in low spots creating a combustible hazard.

Answer: Any of the Above (Oxygen, Fuel and/or Kindling Temp)

28. It is acceptable to use regulators with damaged gauges.

Answer: False

29. Oxygen and fuel cylinders may be transported in an enclosed vehicle.

Answer: False

30. Never use a cigarette lighter to ignite an oxy-fuel torch.

Answer: True


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