1 powerboats 26 feet long but less than 40 feet long must carry at least two B-1 fire extinguishers or the equivalent, such as a B-2 fire extinguisher; 2  powerboats 40 feet long but less than 65 feet long must carry at least three B-1 fire extinguishers or the equivalent, such as one B-1 and one B-2 fire extinguisher.
Rather, the core is made up of a non-toxic mineral called graphite. The common name âpencil leadâ is due to an historic association with the stylus made of lead in ancient Roman times. If youâre looking for information on potential lead exposure risks in pencils, Click here.
Graphite is the most stable form of carbon under standard conditions. Therefore, it is used in thermochemistry as the standard state for defining the heat of formation of carbon compounds.raphite is also commonly used in the form of powders, and sticks for the purpose of writing or drawing. Graphite of various hardness or softness results in different qualities and tones when used as an artistic medium.