Automobile emissions testing is required in all or part of 33 states to help maintain the federal air quality standard. Areas that were in moderate nonattainment or worse for ozone in 1990 are included in Ohio's E-Check program. These areas include the metropolitan statistical areas of Cleveland and Akron.
Freebase(0.00 / 0 votes)Rate this definition: Alcohol proof. Alcohol proof is a measure of how much alcohol is contained in an alcoholic beverage. The term was originally used in the United Kingdom and was defined as 7/4 times the alcohol by volume.
From the 18th century until 1 January 1980, the UK measured alcohol content by proof spirit, defined as spirit with a gravity of 12â13 that of water, or 923 kg/m3, and equivalent to 57.15% ABV. The value 57.15% is very close to the fraction 4â7 = 0.5714.