FDLE Practice Exam 2025 – Complete Study Guide

Blood Alcohol Concentration (BrAC) is a measurement of the amount of alcohol present in a person's breath and is typically expressed in terms of grams of alcohol per volume of breath. The standard conversion factor used for BrAC is 2100. This means that if 0.1 grams of alcohol are present in 210 liters of breath, it would be equivalent to a certain blood alcohol concentration.

The basis for this measurement comes from the physiological relationship between alcohol concentration in breath and blood, facilitated by the principle that a certain amount of alcohol in breath corresponds to a specific concentration in the bloodstream. This specific conversion factor is critical for law enforcement officers and medical professionals when interpreting breathalyzer results, as it ensures uniformity in measurement across various testing devices and methodologies.

The value of 210 liters is essential because it allows for an accurate and standardized understanding of an individual's alcohol level based on the breath sample provided, which becomes vital in legal contexts and public safety assessments.