Sparks from a cutting operation can travel at least _____.

Sparks from a cutting operation can travel at least _____.
 
  a. 20 feet
  b. 30 feet
  c. 40 feet
  d. 50 feet

 Q. 2

Oil residue in an air tool can explode if it combines with _____.
 
  a. nitrogen
  b. fuel gas
  c. oxygen
  d. carbon monoxide

 Q. 3

The pressure regulator on a fuel tank _____.
 
  a. prevents gas from backing up into the tank
  b. relieves excess internal pressure to keep the tank from exploding
  c. allows the operator to increase the working pressure in order to work faster
  d. reduces the high pressure in the cylinder to the lower working pressures required for cutting or
  welding