MCQ on Indian River System Set -9
Q81. Which river systems discharge their water in the Bay of Bengal?
A. Narmada and Tapi
B. Godavari and Krishna
C. Mahanadi and Kaveri
D. Ganga and Brahmaputra
Answer –C. Mahanadi and Kaveri
Explanation-The major Peninsular rivers, except Narmada and Tapi, flow from west to east and discharge their water in the Bay of Bengal. The Mahanadi and Kaveri are two examples of such river systems.
Q82. Which geographical feature acts as the water divide between major Peninsular rivers?
A. Himalayan mountain range
B. Western Ghats
C. Eastern Ghats
D. Deccan Plateau
Answer –B. Western Ghats
Explanation-The Western Ghats, running close to the western coast of India, act as the water divide between the major Peninsular rivers. These rivers discharge their water either in the Bay of Bengal or as small rivulets joining the Arabian Sea.
Q83. What distinguishes the Narmada and Tapi Rivers from other Peninsular rivers?
A. They flow from east to west.
B. They have meandering courses.
C. They discharge their water in the Arabian Sea.
D. They are perennial rivers.
Answer –D. They are perennial rivers.
Explanation-The Narmada and Tapi rivers, which flow through the rift valley, are exceptions among the Peninsular rivers. Unlike most Peninsular rivers, they are perennial rivers, meaning they have a continuous flow of water throughout the year.
Q84. Which rivers are characterized by a fixed course, absence of meanders, and non-perennial flow of water?
A. Godavari and Krishna
B. Mahanadi and Kaveri
C. Narmada and Tapi
D. Chambal and Betwa
Answer –C. Narmada and Tapi
Explanation-Among the Peninsular rivers, the Narmada and Tapi rivers are exceptions. They have a fixed course, absence of meanders, and flow continuously throughout the year, unlike other Peninsular rivers that may have meanders and non-perennial flow of water.
Q85. What geological event caused the subsidence of the western flank of the Peninsula during the early tertiary period?
A. Upheaval of the Himalayas
B. Submergence below the sea
C. Trough faulting
D. Tilting of the Peninsular block
Answer –B. Submergence below the sea
Explanation-The subsidence of the western flank of the Peninsula during the early tertiary period led to its submergence below the sea. This event disrupted the symmetrical plan of the rivers on either side of the original watershed.
Q86. Which rivers in Peninsular India flow in trough faults?
A. Godavari and Krishna
B. Mahanadi and Kaveri
C. Narmada and Tapi
D. Chambal and Betwa
Answer –C. Narmada and Tapi
Explanation-The Narmada and Tapi rivers in Peninsular India flow in trough faults. These rivers fill the original cracks with their detritus materials, resulting from the upheaval of the Himalayas and consequent trough faulting.
Q87. What is the consequence of the Narmada and Tapi filling the original cracks with detritus materials?
A. Lack of alluvial and deltaic deposits
B. Formation of meanders
C. Diversion of water towards the Arabian Sea
D. Increased sedimentation in the riverbed
Answer –A. Lack of alluvial and deltaic deposits
Explanation-The Narmada and Tapi rivers, which flow in trough faults and fill the original cracks with their detritus materials, lack alluvial and deltaic deposits. The presence of these materials in the cracks prevents the formation of such deposits.
Q88. What caused the orientation of the entire drainage system in Peninsular India towards the Bay of Bengal?
A. Submergence below the sea
B. Upheaval of the Himalayas
C. Trough faulting
D. Tilting of the Peninsular block
Answer –D. Tilting of the Peninsular block
Explanation-The slight tilting of the Peninsular block from the northwest to the southeastern direction during the early tertiary period caused the orientation of the entire drainage system in Peninsular India towards the Bay of Bengal.
Q89. Which river rises near Sihawa in the Raipur district of Chhattisgarh?
A. Godavari
B. Mahanadi
C. Krishna
D. Tapti
Answer –B. Mahanadi
Explanation-The Mahanadi River rises near Sihawa in the Raipur district of Chhattisgarh.
Q90. What is the total length of the Mahanadi River?
A. 851 km
B. 1,420 km
C. 853 km
D. 1,440 km
Answer –A. 851 km
Explanation-The Mahanadi River is 851 km long.
