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UPSC Civil Service Exam Questions - Engineering

Q1:

In a BG railway track, the specified ruling graident is 1 in 250. The horizontal curve of 3° on a gradient of 1 in 250 will have the permissible compensated gradient of

A 1 in 257

B 1 in 357

C 1 in 457

D 1 in 512

ANS:B - 1 in 357

.04% * 3 = 0.12%,
= (1/250)-(.12/100),
= (100-30)/250*100,
= 1/357.