# Civil Engineering - UPSC Civil Service Exam Questions - Discussion

35.

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

Explanation:

No answer description available for this question.

 Shyam said: (May 30, 2015) Length of valley curve is determine on the basis of HSD.

 Pankaj said: (Mar 24, 2017) Answer is only 2, option D.

 Dhanu said: (Sep 19, 2017) Yes, the correct option is D.

 Chetan said: (Jan 20, 2018) Second statement is false right? since those two gradients form a valley curve.

 Basavaraj said: (Jul 18, 2018) I think Option D is correct.

 Pratap said: (Sep 15, 2018) Headlight sight distance is criteria for valley curve. So, statement 2 is wrong.

 Sidkudas said: (Aug 22, 2019) All the statement are wrong, valley curve is formed when descending meet ascending gradient. , And vice versa for summit curve. And headlight sight distance is criteria for determining valley or sag curve.