NICET - Highway Construction Inspection Practice Exam

What is the definition of contour interval?

1. The difference in elevation between two contour lines that are adjacent

2. The total elevation from base to peak

3. The measurement of land area

4. The distance between two parallel lines

The correct answer is: The difference in elevation between two contour lines that are adjacent

The definition of contour interval refers to the difference in elevation between two adjacent contour lines on a topographic map. This measurement is crucial for understanding the terrain's slope and elevation changes, as it indicates how steep or gradual the land is in a given area. The contour interval provides a consistent scale that allows for the interpretation of the land's profile and helps in visualizing the landscape's features such as hills, valleys, and plateaus. Having a clear understanding of this definition is essential for anyone involved in highway construction and inspection, as it influences grading, drainage, and overall project design. The contour interval allows engineers and planners to make informed decisions about the layout of roads and infrastructure based on the terrain's physical characteristics.