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UPSC Civil Service Exam Questions

Q1:

Consider the following statements :
1. An ascending gradient of 1 in 100 meets an ascending gradient of 1 in 120 to form a Valley curve.
2. A falling gradient of 1 in 25 meets a falling gradient of 1 in 50 to form a summit curve.
3. The length of summit curve is determined on the basis of head light sight distance.
Which one of the statements given above is/are correct ?

A 1 and 2

B 2 and 3

C 1 and 3

D 2 only

ANS:B - 2 and 3

Options is 1 and 2 means A) is correct because when to ascending grade meet if G1>G2 then valleys curve form and if G2>G1 then summit curve form likewise if descending grade meets with another descending grade if G1>G2 valley curve but G2>G1 summit curve form.

So both 1 and 2 are correct but 3 is wrong.



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