Section 4: Soil and Water Conservation Engineering
Soil Mechanics
Subtopic: Soil compaction and Proctor test
Question Statement:
In soil compaction testing, increasing the compactive energy applied to a given soil mass results in:
Options:
(A) Higher Maximum Dry Density (MDD) and lower Optimum Moisture Content (OMC)
(B) Lower Maximum Dry Density (MDD) and higher Optimum Moisture Content (OMC)
(C) Higher Maximum Dry Density (MDD) and higher Optimum Moisture Content (OMC)
(D) Lower Maximum Dry Density (MDD) and lower Optimum Moisture Content (OMC)
Answer Key:
A
Step-by-Step Solution & Explanation
Increasing the compactive effort (e.g., from Standard to Modified Proctor) packs soil solids more densely, achieving a higher maximum dry density (MDD) at a lower optimum moisture content (OMC).