FAA Ground School Practice Test

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What is the legal blood alcohol concentration limit for a crewmember of a civil aircraft?

0.01 percent by weight
0.04 percent by weight
0.08 percent by weight
0.10 percent by weight

The correct answer is: 0.04 percent by weight

The legal blood alcohol concentration (BAC) limit for a crewmember of a civil aircraft is set at 0.04 percent by weight. This regulation is in place to enhance aviation safety by minimizing the risk associated with impaired performance due to alcohol consumption. The Federal Aviation Administration (FAA) enforces strict regulations regarding alcohol for pilots and other crew members, highlighting the importance of maintaining a clear mind and quick reflexes during flight operations. A value of 0.04 percent is significantly lower than what is permissible for many other types of vehicles and operates under the principle that pilots are responsible for the safety of flight. Maintaining this limit ensures that crewmembers can adequately perform required tasks, respond effectively to any emergencies, and maintain a high standard of safety for everyone on board.