Question 1

How do barrel sizes differ?

Accepted Answer

Oil barrel = 42 gal. Beer barrel (US) = 31 gal. Wine barrel = 59-60 gal. UK barrels differ from US.

Question 2

What barrel size should I use?

Accepted Answer

Context matters: oil industry uses 42-gal, brewing uses 31-gal (US), wine uses 59-gal. Specify or check industry standard.

Question 3

Are US and UK gallons the same?

Accepted Answer

No! US gallon = 3.785 liters. UK (Imperial) gallon = 4.546 liters. UK gallon is about 20% larger. Same applies to pints and fluid ounces.

Question 4

What's the most accurate way to measure volume?

Accepted Answer

For precision: measure by weight and convert using density. For liquids at eye level: read at the bottom of the meniscus curve.

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