Civil Engineering - GATE Exam Questions - Discussion

17. 

Two footings, one circular and the other square, are founded on the surface of a purely cohesionless soil. The diameter of the circular footing is same as that of the side of the square footing. The ratio of their ultimate bearing capcities is

[A]. 3/4
[B]. 4/3
[C]. 1.0
[D]. 1.3

Answer: Option D

Explanation:

No answer description available for this question.

Divya said: (Sep 28, 2015)  
Description please.

Sudeep said: (Nov 16, 2015)  
Correct answer is 3/4.

C = 0; D = 0.

Therefore, (qf)cir/(qf)sq = 0.3yBNq/0.4yBNq.

= 3/4.

Shubham said: (Jul 16, 2016)  
Yeah. The Correct answer is 3/4.

Priyanka said: (Mar 25, 2017)  
The correct answer is A.

Swastik said: (Sep 4, 2017)  
Correct answer is A.

Roy said: (Nov 26, 2017)  
It's 0.6/0.4=1.5.

Ietakshay said: (Jul 31, 2018)  
Given Ans 1.3 is correct.

Ratio = strength of circular section / Strength of Square section.

If We assumed Side or Dia. Is 4 cm.
And Load P is the same,
Then Ratio of ultimate stresses of circular to the square is;

= (P/12.56) / (P/16).
= P .16/P. 12.56.
= 1.3.

Mohd Tariq said: (Jan 4, 2019)  
The Correct answer is 3/4.

Jaydev Kumar Saha said: (Jan 9, 2019)  
Yes, agree the Correct answer is A.

Bhutan said: (Jun 8, 2019)  
Option A, 3/4 is correct.

Bhutan said: (Jun 19, 2019)  
The Correct option is A.

Purushottam said: (Feb 5, 2020)  
Correct option B & D.
4/3 = 1.3.

Rand said: (Aug 21, 2020)  
What if its cohesion soil? any difference? Explain me.

Narayan Saha said: (Dec 6, 2020)  
The Correct answer will be option A.

Santosh said: (Dec 24, 2020)  
3/4 is the right answer.

Mahesh Sin said: (Sep 30, 2021)  
Area of circular footing = π/4 d2.
= 0.785 d2.

Area of square = d2(because d=l).
Bearing capacity = load/area.
Circular = load/0.785d2.
Square. = load/d2.

Ratio = load/0.785d2*d2/load.
= 1/0.785,
= 1.27.
= 1.30.

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