The documentation notes a measurement of 1.4 inches per foot for a certain installation parameter. Which option correctly represents this value?

• A. 0.5
• B. 2
• C. 0.25
• D. 1.4" per foot

Answer: (D)

Reading measurements that use inches per foot requires keeping the unit. When a spec states 1.4 inches per foot, it means 1.4 inches of the parameter for every foot of length. The exact restatement is 1.4" per foot. The other numbers point to different per-foot amounts: 0.5" per foot, 2" per foot, or 0.25" per foot, none of which match the 1.4" per foot given. If you ever convert to a unitless slope, 1.4" per foot equals 1.4/12 ≈ 0.1167.