Which of the following statement(s) is/are incorrect? i. The dry density is the bulk density of soil in dried condition ii. The void ratio of a saturated soil can be determined from its water content iii. 100% saturation line and zero percent air voids line are identical.
- AOnly (i)Correct
- B(i) and (ii)
- C(ii) and (iii)
- DOnly (iii)
Solution
Concept
Dry density and saturation relations
Formula
e = wG (saturated)
Step-by-step solution
1. Dry density = mass of solids/total volume of the sample at its original volume, not the bulk density after drying (which would change volume), so (i) is incorrect. 2. For a saturated soil e = wG, so (ii) is correct. 3. The zero air voids line corresponds to S = 100%, so (iii) is correct.
Explanation
Only statement (i) is incorrect.
Why the other options are wrong
(ii) and (iii) are correct.
Correct answer: A) Only (i)