NPDES Level 1A Practice Test WITH QUESTIONS AND VERIFIED ANSWERS GRADED A+

SECTION I: SOIL EROSION FUNDAMENTALS

Q1. A slope gradient of 25% (4:1) would indicate that in a horizontal length of

100 feet, the vertical rise would be ______ feet.

A) 2.5

B) 12.5

C) 25

D) 4

Correct Answer: C) 25

Rationale: Slope percentage = (vertical rise / horizontal run) × 100....