King of the Highway: The Ultimate Big Rig & Semi-Truck Operations Challenge
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What is the primary chemical chemical mix in Diesel Exhaust Fluid (DEF)?
Explanation
DEF is a high-purity solution consisting of 32.5% high-grade synthetic urea and 67.5% deionized water. It is injected into the Selective Catalytic Reduction (SCR) system to break down dangerous nitrous oxide (NOx) gases into harmless nitrogen and water vapor.