Soil Mechanics and Foundation
Coefficient of compressibility is

different for different types of soils but same for a soil under different states of consolidation
independent of type of soil but depends on the stress history of soil
constant for any type of soil
different for different types of soils and also different for a soil under different states of consolidation

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Soil Mechanics and Foundation
In a triaxial compression test when drainage is allowed during the first stage (i. e. application of cell pressure) only and not during the second stage (i.e. application of deviator stress at constant cell pressure), the test is known as

unconsolidated drained test
consolidated undrained test
consolidated drained test
unconsolidated undrained test

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Soil Mechanics and Foundation
Degree of consolidation is

directly proportional to time and inversely proportional to drainage path
directly proportional to drainage path and inversely proportional to time
directly proportional to square of drainage path and inversely proportional to time
directly proportional to time and inversely proportional to square of drainage path

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