Soil Mechanics and Foundation
Hydrometer readings are corrected for:

Temperature, meniscus and dispersing agent corrections
Dispersing agent correction
Meniscus correction
Temperature correction

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Soil Mechanics and Foundation
For a loose sand sample and a dense sand sample consolidated to the same effective stress

ultimate strength is same but peak
ultimate strength is same and also peak strength is same
ultimate strength is different but peak strength is same
ultimate strength is same but peak strength of dense sand is greater than that of loose sand

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