Question10:-Which among the following statement is true regarding porosity?
(i) | Rocks have higher porosities than soils.
(ii) Gravels, sands and silts which are made up of angular and rounded particles,
have
higher porosities than soils rich in platy clay minerals.
(iii) Poorly sorted deposits have lower porosities than well-sorted deposits.
(iv) Clay-rich soils have higher porosities but lower hydraulic conductivities.

A:-Only options (i) and (ii)
B:-Only options (i) and (iii)
C:-Only options (i), (ii) and (iii)
D:-Only options (iii) and (iv)
Correct Answer:- Option-D

Question11:-Which geological formation can provide small domestic water supply
from shallow, large diameter wells?

A:-Sandstone

B:-Clay

C:-Basalt
D:-Conglomerates
Correct Answer:- Option-B

Question12:-Which among the following is true regarding the capillary rise?
(i) |The wider the tube, the higher the water level rises.

(ii) The narrower the tube, the higher the water level rises.

(111) There is no relation between the pore size and water level rise.

A:-Only (i)

B:-Only (ii)

C:-Only (iii)

D:-None of the above

Correct Answer:- Option-B
Question13:-Spring that are found only in Karst aquifers.

A:-Tubular spring

B:-Fracture spring

C:-Fault springs

D:-Doline spring

Correct Answer:- Option-D

Question14:-Choose the correct statement from the below options:

(i) | Volcanic rock can form highly permeable aquifers.

(11) In sandstone, the porosity and yield have been increased by cement.
(iii) Igneous and metamorphic rocks are impermeable in nature.

(iv) Rhyolites are less permeable than basalt.

A:-Only (i)