Problem of the Week: Spiral Curves

A spiral curve, as used in surveying, is

(A) also known as a compound circular curve

(B) a hyperbolic curve in the horizontal plane

(C) a loxodrome

(D) a curve with a uniformly varying radius

A spiral curve, as used in surveying, is a curve whose radius is constantly increasing or decreasing at a uniform rate as the curve continues. There are several mathematical solutions of spiral curves.

The answer is (D).

This is problem 34 (2-8) from the NEW third edition of “Surveying Solved Problems for the FS and PS Exams” by Jan Van Sickle, PLS (formerly "1001 Solved Surveying Fundamentals Problems"). Reprinted with permission from “Surveying Solved Problems for the FS and PS Exams” by Jan Van Sickle, PLS (2008 Professional Publications Inc.). For details on this and other FLS exam-prep books, call 800/426-1178 or visit www.ppi2pass.com.