Problem: Advanced Mathematics: Spiral Curves

What is a spiral curve, as used in surveying?

(A) A spiral curve is also known as a compound circular curve.
(B) A spiral curve is a hyperbolic curve in the horizontal plane.
(C) A spiral curve is a loxodrome.
(D) A spiral curve is a curve with a uniformly varying radius.

This is problem 43(2-46) from the new second edition of 1001 Solved Surveying Problems by Jan Van Sickle. Reprinted with permission from 1001 Solved Surveying Problems by Jan Van Sickle (1997, 728 pp., Professional Publications Inc.). For details on this and other FLS exam-prep books, call 800/426-1178 or visit www.ppi2pass.com.

Answer: D

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.