Civil Engineering - UPSC Civil Service Exam Questions - Discussion

31. 

A constant angle arch dam when compared to a constant radius arch dam utilizes concrete quantity of about

[A]. 33%
[B]. 43%
[C]. 73%
[D]. 143%

Answer: Option B

Explanation:

No answer description available for this question.

Karthika said: (Jul 17, 2017)  
How?

Please explain it.

Priya said: (Dec 21, 2017)  
Explain it.

Rishabh said: (Dec 23, 2018)  
The constant angle arch dam is a special type of variable radius arch dam in which the central angle of the horizontal arch rings is of the same magnitude at all elevations.

Arch-dam-type.

It has been shown that the volume of concrete is minimum when the central angle is 133' 34'.

A variable radius arch uses about 58% of the concrete required in constant radius arch dams. A constant angle arch dam requires about 42.6% of the concrete required in constant radius arch dams.

Hence a constant angle arch dam is the most economical.

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