Name:    
 Address 1:    
 Address 2:    
 City:    
 State/Province:  
 Zip/Postal Code:    
 Country:  
 Email:  

  1. A "Creeping Regulator" is a regulator that:
   
a) Due to internal vibration causes a cylinder to move.
b) Is being referred to as "junk."
c) The delivery pressure does not stay constant, it rises.
d) Both a and c.

 2. A "Flashback" refers to:
   
a) The loud "pop" that sometimes results when lighting a torch.
b) Regression of the flame, usually back to the point of mixing.
      c) When a higher pressure flow overcomes a lower pressure flow and reverses direction in the torch passes/hoses.
d) A sustained burning of mixed gases within a torch.

 3. After a flashback has occurred, the correct method for checking if the flash arrestor can still function properly is by:
   
      a) Taking the flash arrestor and placing it on the outlet side of the regulator dialing in 5-10 psi on the pressure adjusting screw and checking for leaks.
b) Visually checking internally both ends of the flash arrestor for dirt or discoloration.
c) Sending the flash arrestor back to a repair shop for maintenance.
d) Flash arrestors should be disposed of after each flashback and cannot be reused.

 4. Oil and oxygen-using equipment are incompatible. If you have a torch or regulator that has become contaminated by oil, it should be:
   
a) Wiped clean with an oxygen compatible solvent and returned to service.
b) Dipped in a solvent bath, tested to specs, and then returned to service.
c) Retired from service.
d) Sent to a repair center for disposal.

 5. Which of the following materials can be cut with the oxy-fuel gas process?
   
a) Stainless Steel
b) Copper
c) Carbon Steel
d) Aluminum
e) All of the above

 6. For an adapter to be legally used, the corresponding regulator/cylinder devices must comply with CGA dimensional standards and be UL approved.
   
a) True
b) False

 7. Which ESAB regulator features are specifically designed to protect against RBO?
   
a) Small internal cavities in the regulator body.
b) Regulator body machined from solid brass bar stock.
c) Heavy duty baffle design.
d) All of the above.

 8. In order to prevent an unsafe condition, all empty cylinders in storage shall have their respective valves open to ensure proper venting and prevent the risk of vapor pressurization.
   
a) True
b) False

 9. The stamping, such as 15A, found on a Purox/Oxweld welding head would denote:
   
a) 15 psi absolute
b) 15 psi of acetylene to operate
c) 15 cfh of acetylene average consumption
d) 15 cfh of acetylene/oxygen consumption

 10. Any apparatus device designed for C2H2 (acetylene) can be safely operated with any fuel gas.
   
a) True
b) False

 11. The optimal location to place a flash arrestor is at:
   
a) The torch
b) The regulator
c) One at the torch and one at the regulator
d) The more flash arrestors you use, the safer the system will be

 12. When using a flash arrestor, how much should the delivery pressure be increased to avoid inducing flashbacks?
   
a) 5-10%
b) 10-20%
c) 20-40%
d) 40-50%

 13. What is the proper cleaning kit to be used with high speed, diversion bore nozzles?
   
a) A standard kit which can be used on all nozzles
b) A toothpick
c) Any kits which contain "ribbed" cleaners
d) A special set designed for "high speed" nozzles

 14. All regulators are interchangeable by simply changing the inlet fittings.
   
a) True
b) False

 15. What does the term "RBO - Regulator Burn Out" indicate?:
   
a) A malfunctioning regulator which should be retired.
b) Another term for "flashbacks" or "backfires".
c) A high oxygen flow through the regulator.
d) An oxygen regulator fire or explosion.