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55.

Select the correct range of density index,ID

A.	lD>0	B.	ID>0
C.	0 < lD < 1	D.	0 < ID < 1

56.

Select the correct statement.

A.	Unit weight of dry soil is greater than unit weight of wet soil.	B.	For dry soils, dry unit weight is less than total unit weight.
C.	Unit weight of soil increases due to submergence in water.	D.	Unit weight of soil decreases due to submergence in water.

57.

Select the correct statement.

A.	A uniform soil has more strength and stability than a non-uniform soil.	B.	A uniform soil has less strength and stability than a non-uniform soil.
C.	Uniformity coefficient does not affect strength and stability.	D.	Uniformity coefficient of a poorly graded soil is more than that of a well graded soil.

58.

Select the correct statement.

A.	coefficient of compressibility of an over-consolidated clay is less than that of a normally consolidated clay	B.	coefficient of compressibility of an over-consolidated clay is greater than that of a normally consolidated clay
C.	coefficient of compressibility is cons-tant for any clay	D.	none of the above

59.

Select the incorrect statement.

A.	Effective cohesion of a soil can never have a negative value.	B.	Effective angle of internal friction for coarse grained soils is rarely below 30.
C.	Effective angle of internal friction for a soil increases as state of compact-ness increases.	D.	Effective angle of internal friction is a complicated function of mineralogy and clay size content.

60.

Select the incorrect statement.

A.	In a direct shear box test, the plane of shear failure is predetermined.	B.	Better control is achieved on the drainage of the soil in a triaxial com-pression test.
C.	Stress distribution on the failure plane in the case of triaxial compression test is uniform.	D.	Unconfined compression test can be carried out on all types of soils.

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