Landforms and Their Formation NDA Questions

NDA Physical Geography

Landforms and Their Formation MCQ Questions


7.
Which mode of river transport involves particles rolling along the riverbed?
A.
Solution
B.
Saltation
C.
Suspension
D.
Traction
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ANSWER :
D. Traction
8.
The cross-sectional shape of a river valley in its upper course is best described as:
A.
Deep, narrow V-shaped
B.
Wide, flat U-shaped
C.
Broad, shallow saucer-shaped
D.
Rectangular canyon-shaped
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ANSWER :
A. Deep, narrow V-shaped
9.
Interlocking spurs form in the upper course when:
A.
Sea waves erode headlands alternately
B.
A glacier deposits material on alternating sides
C.
The river deposits material on each bend
D.
A river with limited lateral power winds around hard rock ridges projecting alternately from each valley side
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ANSWER :
D. A river with limited lateral power winds around hard rock ridges projecting alternately from each valley side
10.
A waterfall forms where a river flows over:
A.
Soft rock overlying hard rock
B.
An area of maximum deposition
C.
A band of resistant rock overlying softer rock — the softer rock is undercut creating a plunge pool, causing the cap to collapse
D.
Completely flat rock
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ANSWER :
C. A band of resistant rock overlying softer rock — the softer rock is undercut creating a plunge pool, causing the cap to collapse
11.
The feature left behind as a waterfall retreats upstream is a:
A.
Gorge or canyon
B.
Natural levee
C.
Oxbow lake
D.
Delta
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ANSWER :
A. Gorge or canyon
12.
Potholes in riverbeds are formed by:
A.
Freeze-thaw widening joints in bedrock
B.
Corrasion — pebbles trapped in depressions rotated by eddying currents drill cylindrical holes into bedrock
C.
Chemical weathering of limestone
D.
Deposition of coarse material in depressions
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ANSWER :
B. Corrasion — pebbles trapped in depressions rotated by eddying currents drill cylindrical holes into bedrock