Kaplan question states...
Under normal conditions, a steady slope of 10% is a desirable limit for which of the following?
Storm drainage flow
Unretained earth cuts
the answer is:
The answer is II and V. Pedestrian walks should not exceed a slope of 10% (or 15% for very short ramps), and drainage ditches vary in slope from a minimum of 2% to a maximum of 10%.
Storm drains slope between 0.3% and 1%, so choice I is incorrect. Planted banks should not exceed a slope of 50%, so choice III is incorrect. The maximum slope of unretained earth cuts varies from 50% to 100%, depending on the type of soil, so choice IV is incorrect.
am I reading the question wrong but isn't the max pedestrian slope not to exceed 5%? Even a ramp slope is less than 10%, how can pedestrian slope be one of the correct answers?
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