Ohio Drivers Ed Practice Exam

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An 80 proof liquor is what percent alcohol by volume?

  1. 20%

  2. 30%

  3. 40%

  4. 50%

The correct answer is: 40%

The answer is not A because 20% is too low for an 80 proof liquor. The correct answer is not B because 30% is also too low for an 80 proof liquor. The answer cannot be D because 50% is too high for an 80 proof liquor. A proof is defined as twice the percentage of alcohol by volume, so 80 proof would be 40% alcohol by volume. Therefore, the correct answer is C 40%.

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