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25.

Degree of consolidation is

A.	directly proportional to time and inversely proportional to drainage path	B.	directly proportional to time and inversely proportional to square of drainage path
C.	directly proportional to drainage path and inversely proportional to time	D.	directly proportional to square of drainage path and inversely propor-tional to time

26.

Direct measurement of permeability of the specimen at any stage of loading can be made

A.	only in fixed ring type consolido-meter	B.	only in floating ring type consolido-meter
C.	both (a) and (b)	D.	none of the above

27.

Dispersed type of soil structure is an arrangement comprising particles having

A.	face to face or parallel orientation	B.	edge to edge orientation
C.	edge to face orientation	D.	all of the above

28.

Due to a rise in temperature, the viscosity and the unit weight of the percolating fluid are reduced to 60% and 90% respectively.If other things remain constant, the coefficient of permeability

A.	increases by 25%	B.	increases by 50%
C.	increases by 33.3%	D.	decreases by 33.3%

29.

Effective stress is

A.	the stress at particles contact	B.	a physical parameter that can be measured
C.	important because it is a function of engineering properties of soil	D.	all of the above

30.

Effective stress on soil

A.	increases voids ratio and decreases permeability	B.	increases both voids ratio and per-meability
C.	decreases both voids ratio and per-meability	D.	decreases voids ratio and increases permeability

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