Section 4: Soil and Water Conservation Engineering
Soil Mechanics
Subtopic: Soil compaction and Proctor test
Question Statement:
In the Standard Proctor compaction test of a soil, increasing the compaction effort results in:
Options:
(A) Higher maximum dry density and lower Optimum Moisture Content (OMC)
(B) Lower maximum dry density and higher OMC
(C) Higher maximum dry density and higher OMC
(D) Lower maximum dry density and lower OMC
Answer Key:
A
Step-by-Step Solution & Explanation
Higher compaction energy packs soil particles more densely (raising maximum dry unit weight $\gamma_{d,\max}$) while requiring less lubricating water to reach peak packing (lowering Optimum Moisture Content).