2024 Facts for Drivers PDF

What is the purpose of a nitrogen blanket in a trailer? a Nitrogen is a colorless, odorless gas that does not support com- bustion. Applying a cover of nitrogen gas (nitrogen blanket) over the surface of a flammable or combustible product is ideal for pressure-unloading flamma...

What is the purpose of a nitrogen blanket in a trailer? a Nitrogen is a colorless, odorless gas that does not support com- bustion. Applying a cover of nitrogen gas (nitrogen blanket) over the surface of a flammable or combustible product is ideal for pressure-unloading flammable or combustible materials, espe- cially those with a low flash point. Nitrogen also is used to prevent product contamination from air or moisture. What is the danger associated with nitrogen blankets? a, Nitrogen displaces oxygen; therefore, brief exposure to a concen- trated atmosphere of nitrogen can render someone unconscious almost instantly. Nitrogen cannot be seen or smelled. It can only be detected by testing. What type of product hazard classes must be grounded while loading and unloading? Products considered to be flammable and combustible must be srounded while being loaded and unloaded. What is the “remote control” on a cargo tank? a, The remote control on a cargo tank is a secondary control to close the internal valves. It is an emergency device located remotely from the normal control handles used to operate the internal valves. Internal valves on cargo tanks are used for what purpose? mi A cargo tank's internal valves are self-closing shut-off valves used in normal unloading operations and are designed and operated to close automatically to prevent the accidental release of product. Why are cargo tanks equipped with “overturn protection’? Pe Overturn protection protects the cargo tank's valves and manhole covers from damage in the event of overturn so as to minimize or totally prevent cargo loss. What is the purpose of “fusible links”? a Fusible links or elements are heat-activated devices installed in the cable lines, or tubing (in the case of hydraulically or air- con- trolled internal valves) of tank trailers. They are designed to melt at a temperature no greater than 121° C (250° F) in case of fire and, when melted, trigger the internal valves to close automatically. oF