Weathering and Erosion NDA Questions

NDA Physical Geography

Weathering and Erosion MCQ Questions


13.
Frost shattering (gelifraction) is the dominant weathering process in:
A.
Tropical savannas
B.
Hot deserts
C.
Equatorial rainforests
D.
Periglacial and alpine regions
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ANSWER :
D. Periglacial and alpine regions
14.
The prying apart of rock slabs along joints and bedding planes by growing salt crystals is called:
A.
Hydrolysis
B.
Thermal expansion
C.
Salt weathering (haloclasty)
D.
Granular disintegration
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ANSWER :
C. Salt weathering (haloclasty)
15.
The unloading or pressure release that causes rocks to expand and fracture parallel to the surface is known as:
A.
Granular disintegration
B.
Exfoliation due to thermal stress
C.
Frost wedging
D.
Sheeting or pressure release jointing
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ANSWER :
D. Sheeting or pressure release jointing
16.
Block disintegration of granite into angular blocks results from:
A.
Hydration of feldspar minerals
B.
Exploitation of existing joints and fractures by weathering agents
C.
Solution of calcium carbonate
D.
Oxidation of iron minerals
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ANSWER :
B. Exploitation of existing joints and fractures by weathering agents
17.
Granular disintegration is most common in:
A.
Shale deposits
B.
Limestone landscapes
C.
Coarse-grained igneous rocks like granite in arid regions
D.
Sandstone with soluble cement
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ANSWER :
C. Coarse-grained igneous rocks like granite in arid regions
18.
Which of the following is NOT a type of physical/mechanical weathering?
A.
Frost action
B.
Hydrolysis
C.
Salt crystallisation
D.
Thermal expansion and contraction
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ANSWER :
B. Hydrolysis