The suitability for a particular type of foundation does NOT depend upon the ______.
Try it first: pick an option, then read the explanation.
Asked in SSC JE 06/06/2024 (Evening)
Detailed Explanation
Choosing a foundation means matching what the structure needs (how heavy, how sensitive to settlement) with what the ground can give (how strong, how compressible, how wet).
Why “optimum moisture content (OMC) of soil” Is Correct
The type of soil decides bearing capacity and settlement, the magnitude of loads decides how big or deep the foundation must be, and the water table reduces bearing capacity and affects excavation. The optimum moisture content only tells us the water content at which a soil compacts best in a Proctor test. It matters for earthwork and embankments, not for picking a foundation type.
Why the Other Options Are Wrong
- B. depth of ground water table: A high water table lowers bearing capacity and makes excavation harder, so it does affect the choice.
- C. magnitude of loads: Heavy loads may need a raft or piles instead of footings.
- D. type of soil: Soil type is the main factor in choosing a foundation.
Key Point
OMC belongs to compaction; foundation choice depends on soil type, loads and water table.
Key Concepts for Students
- Other factors: permissible settlement, depth of a firm stratum, nearby structures, cost.
- OMC and maximum dry density are found by the Proctor test.
- A water table at the footing base can cut bearing capacity of sand by up to about half.
Practice more: this is question 2 in Shallow and Deep Foundation MCQs – Part 1. Try the whole set and check every answer instantly.