Engineering :: Soil Mechanics and Foundations

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11.

Soils are derived from

A.	igneous rocks	B.	sedimentary rocks
C.	metamorphic rocks	D.	any one of these

12.

Chemical weathering of soil is caused due to

A.	oxidation	B.	hydration
C.	carbonation and leaching	D.	all of these

13.

The soil transported by glaciers either by ice or water is called

A.	talus	B.	Loess
C.	Drift	D.	none of these

14.

Mechanical weathering of soils is caused by

A.	periodical temperature changes	B.	splitting action of flowing water
C.	splitting action of ice	D.	all of these

15.

When the soils are carried away by force of gravity, they are known as

transported

residual

16.

Residual soils are

A.	sands	B.	silts
C.	clays	D.	all of these

17.

A civil engineer is concerned mainly with

A.	2 to 5 m	B.	5 to 8 m
C.	8 to 10 m	D.	10 to 15 m

18.

Cohesionless soils are

A.	sands	B.	clays
C.	silts	D.	silts and clays

19.

The maximum size of grains of silts is about

A.	0.06 mm	B.	0.2 mm
C.	0.5 mm	D.	1 mm

20.

Silt is a

A.	material deposited by a glacier	B.	soil composed of two different soils
C.	fine grained soil with little or no plasticity	D.	clay with a high percentage of the clay mineral