Multiple choice The temperature of oxy-acetylene flame is around ________. 2800 degree Celsius 3300 degree Celsius 4000 degree Celsius 1500 degree Celsius None of these Reveal answer Fill a bubble to check yourself B Correct answer Explanation Acetylene torch is 6000 degrees Fahrenheit or 3315 degrees Celsius. The oxy-acetylene flame is used in the torch and this flame can melt any commercial metal.