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Surveying - Engineering

Q1:

The ratio of the length of long chord and the tangent length of a circular curve of radius R deflecting through angle Δ, is

A sin

B cos

C tan

D 2 sin

E 2 cos .

ANS:E - 2 cos .

(1) Length of long chord = 2R sinD/2.
(2) Tangent length = R tanD/2.

Ratio =(1) / (2).
Ans. =2 cosD/2.