Civil Engineering - GATE Exam Questions - Discussion

8. 

The superelevation needed for a vehicle travelling at a speed of 60 kmph on a curve of radius 128 m on a surface with a coefficient of friction of 0.15 is :

[A]. 0.71
[B]. 0.81
[C]. 0.91
[D]. 0.61

Answer: Option A

Explanation:

No answer description available for this question.

Parwinder said: (Sep 9, 2013)  
e+f = v^2/127r.

e+0.15 = 60^2/127*128.

e = 0.71.

Mayuri said: (Dec 9, 2015)  
But it comes 0.071, can any one explain?

Ambadas said: (Sep 24, 2016)  
Yes, the answer must be 0.071.

Rakesh Kumar said: (Jan 21, 2017)  
Yes, the answer is 0.071 only. I agree.

Vinay Singh said: (Aug 29, 2017)  
Answer is 0.0714.

Ritesh Kumar said: (Nov 5, 2017)  
But you cannot exceed the limit for e=0.07?

Morphi said: (Apr 7, 2018)  
@ Ritesh Kumar:

The super elevation "needed" is asked, so the answer is 0.071.
However, the super elevation "provided" will be 0.07, as we can't exceed the limit prescribed by IRC.

Uttu said: (Nov 22, 2018)  
It is 0.071456.

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