Question
Download Solution PDFIf the specific yield of a particular sand is 30% and its porosity is 50%, then the specific retention of the sand will be
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
Specific yield (Sy) is the ratio of the volume of water that drains from a saturated rock (due to gravity) to the total volume of the rock.
The Specific Retention (Sr) of a rock or soil is the ratio of the volume of water a rock can retain against gravity to the total volume of the rock.
Therefore, the total porosity is equal to the volume or water that a rock will yield by gravity drainage (Sy) and the volume held by surface tension (Sr) and is given as:
\({S_y} + {S_r} = \eta\)
Calculations:
Given:
Sy = 30%
η = 50%
\({S_y} + {S_r} = \eta\)
\(30\% + {S_r} = 50\%\)
\({S_r} = 50\% - 30\%\)
\({S_r} = 20\%\)
Last updated on Jun 4, 2025
-> BPSC AE 2025 exam date has been revised. The exam will be conducted on July 5, 6 & 7 now.
-> Candidates who were facing technical issues while filling form can now fill the BPSC AE application form 2025 without any issue.
->BPSC AE age limit 2025 has been revised.
->BPSC AE application form 2025 was released on April 30. The last date to fill BPSC AE form 2025 was May 28.
->BPSC AE interview call letters released for Advt. 32/2024.
->BPSC AE notification 2025 has been released.
->A total of 1024 vacancies are announced through BPSC AE recruitment 2025
->The BPSC Exam Calendar 2025 has been released for the Assistant Engineer Recruitment.
-> The selection will be based on a written exam and evaluation of work experience.
-> Candidates with a graduation in the concerned engineering stream are eligible for this post.
-> To prepare for the exam solve BPSC AE Previous Year Papers. Also, attempt the BPSC AE Civil Mock Tests.