National Certified Addiction Counselor, Level I (NCAC I) Practice Exam

Ethyl alcohol, also known as ethanol, is the type of alcohol that is commonly found in beer, wine, and liquor. It is the only form of alcohol that is safe for human consumption in moderate amounts, which is why it is the primary ingredient in alcoholic beverages. Ethyl alcohol is produced through the fermentation process, where yeast converts sugars into alcohol and carbon dioxide.

In contrast, isopropyl alcohol (commonly used as a disinfectant), methyl alcohol (also known as methanol, which is toxic and can cause blindness or death when ingested), and butyl alcohol (used in industrial applications) are not suitable for consumption. Each of these alternatives poses significant health risks and is not intended for use in beverages. Thus, ethyl alcohol is the correct answer, as it is the substance that constitutes the alcohol found in drinks and is associated with the effects of intoxication.