For better strength and stability, the fine grained soils and coarse grained soils are compacted respectively as

Consider the following statements: I. All soils can be identified in the field by visual examination 2. Fine-grained soils can be identified in the field by visual examination and touch. 3. Fine-grained soils can be identified in the field by dilatancy test 4. By visual examination, only coarse-grained soils can be identified Which of the above statements are correct?

A

I and 2 only

B

2 and 3 only

C

3 and 4 only

D

I and 4 only

Following statements are made on compacted soils, wherein DS stands for the soils compacted on dry side of optimum moisture content and WS stands for the soils compacted on wet side of optimum moisture content. Identify the incorrect statement.

A

Soil structure is flocculated on DS and dispersed on WS.

B

Construction pore water pressure is low on DS and high on WS.

C

On drying, shrinkage is high on DS and low on WS.

D

On access to water, swelling is high on DS and low on WS.

Consider the following statements: 1) Secondary consolidation results due to prolonged dissipation of excess hydrostatic pressure 2) Primary consolidation happens under expulsion of both air and water from voids in early stages 3) Initial consolidation in the case of fully saturated soil mainly due to compression of solid particles 4) Primary consolidation happens more quickly in coarse-grained soils than in fine-grained soils Which of the above statements are correct?

A

1 and 2 only

B

2 and 3 only

C

3 and 4 only

D

1 and 4 only

Consider the following statements and state what is not true of the Alluvial Soils? (a) Alluvial soils are the most widely spread soils. (b) Alluvial soils as a whole are very fertile. (c) On the basis of their age they are classified into two - old: Bangar and new: khadar. (d) Khadar soils are more fertile than Bangar (e) Alluvial soils contain an adequate proportion of potash, phosphoric acid and lime (f) Alluvial soils are ideal for sugarcane, paddy, wheat and pulses.

A

(c)

B

(d)

C

(e)

D

None

Coarse grained soils are best compacted by a

A

drum roller

B

rubber tyred roller

C

sheep’s foot roller

D

vibratory roller

The diameter of coarse-grained soils having single grained structure is ____________

A

<0.002 mm

B

>0.002 mm

C

=0.002 mm

D

≥0.002 mm

Consider the following statements 1. Value of transient stability limit will be lower than steady-state stability limit 2. Transient stability limit is the maximum flow of power through a particular point in the power system without loss of stability when large and sudden disturbances occur 3. Critical clearing angle is related to the steady-state stability limit Which of the above statement(s) is/are correct?

A

Only 1

B

All

C

Only 1 and 2

D

Only 1 and 3

The single grained structure is characteristic of fine-grained soils.

A

True

B

False

Put in descending order of soils in terms of percentage area in India: I. Red soils II. Black soils III. Laterite soils IV. Alluvial soils

A

I, IV, II, III

B

IV, II, I, III

C

IV, I, II, III

D

I, III, IV, II

Put in descending order of area with the following soils in India: I. Red soils II. Black soils III. Laterite soils IV. Alluvial soils

A

I, IV, II, III

B

IV, II, I, III

C

IV, I, III, II

D

I, III, IV, II

For better strength and stability, the fine grained soils and coarse grained soils are compacted respectively as

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