Portable Fire Extinguishers No. 4 Questions taken from Jones & Bartlett Fundamentals of Fire Fighter Skills (3rd Edition) Progress Indicator: Question 2 of 12 2.  Welding or cutting shall not be performed within ________ of the underground diesel fuel storage area. Choices: 25 feet 50 feet 100 feet Welding and cutting is permitted in the storage facility provided that certain precautions are addressed.