# Civil Engineering - UPSC Civil Service Exam Questions - Discussion

1.

A soil has a bulk density of 1.80 g/cm3 at water content of 5%. If the void ratio remains constant, then its bulk density for a water content of 10% will be

 [A]. 1.88 g/cm3 [B]. 1.80 g/cm3 [C]. 1.98 g/cm3 [D]. 1.70 g/cm3

Explanation:

No answer description available for this question.

 Pankaj Kalam said: (Apr 17, 2014) Bulk density Yb. Dry Density Yd. water content w. Yb = Yd(1+w). 1.80 = Yd (1+.05). Yd = 1.8/1.05. Yd = 1.71. Yb = 1.71*(1+.1). Yb = 1.88.

 Sinha said: (Oct 27, 2017) 1.71*(1+.1). Yb = 1.88. wrong.

 Manu said: (Dec 30, 2017) 1.88 is the right answer.

 Sass said: (Feb 27, 2018) 1.78 is the correct answer.

 Pradeep Thogiti said: (Mar 10, 2018) For bulk density formula, further simplification we get; (y2)/(y1) = (1+w2)/(1+w1), => y2/1.80 = (1+0.1)/(1+.05), =>y2= 1.88.

 Madhu said: (Nov 20, 2018) Please tell me how it is calculated?

 Somenath Gorai said: (Nov 25, 2018) 1.881gm/c^2.

 Akshay Thakur said: (Dec 21, 2018) Option D is correct and the answer is 1.88 gm/cc.

 Minnu Rajeev said: (Jan 5, 2020) Option D is the correct answer.

 Rushikesh Patil said: (May 27, 2020) STEP 1. Y= 1.8/(1+0.05) Y=1.71. STEP 2. put y value in same formula, 1.71=x/(1+0.1), X = 1.88. (X is an unknown bulk density.)

 Nithin S said: (Feb 3, 2021) Theoretically, adding water dosen't change dry density. Hence, Yd is constant.

 Ankit Kumar Soni said: (Oct 18, 2021) 1.88 is the correct answer.

 Vel said: (Oct 31, 2021) I agree 1.88 is the correct answer.