Controllers shall not consume alcoholic beverages or feel the effects within how long before controlling?

• A. 24 hours
• B. 12 hours
• C. 6 hours
• D. 36 hours

Answer: (B)

Alcohol impairs judgment, coordination, and reaction time, which is critical when someone is in charge of controlling operations. The rule requires not drinking or feeling the effects for a set period before assuming control to minimize the risk of mistakes. Twelve hours is chosen because it gives most people enough time to metabolize typical amounts of alcohol and reduces the chance of residual impairment or hangover effects. Shorter periods can leave lingering impairment, while longer ones are unnecessarily restrictive for everyday duties.