Title: math errors
Product review: This book is required for a State Contractors Test, that is the reason I bought it. The book is generally informative and is interesting to read. I believe that I found at least two examples where the math was simply done completely wrong. Not a math error, but concept issues which are very misleading and can confuse test takers. Do not rely on the examples to learn how to calculate area's and elevation drops in pipe. Otherwise, the book will provide some general understanding in the industry it represents.
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