Practice Quiz

FE Civil Engineering Exam Prep

Category - Civil Engineering

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A slope measurement of 814.20 ft is recorded and an angle measured with a hand level is 6°30’. What is the horizontal distance H for this slope distance?
  1. 807.70 ft
  2. 807.90 ft
  3. 808.96 ft
  4. 820.5 ft
Explanation
Answer: C - The horizontal distance H for a slope measurement of 814.20 ft and angle of 6°30’ is 808.96 ft.

Solution

Use the horizontal distance formula H = L cos a

Where L = 814.20 ft
A = 6°30’

Step 1

Convert angle 6°30’ to DMS: 6°30’ = 6.5°

Step 2

H = L cos 6.5 = (814.20 ft)(0.994) = 808.96 ft
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