BPSC CCE Prelims
Drainage System Previous Year Questions (PYQs)
Practice solved questions for Drainage System with detailed step-by-step solutions, key insights, and trend analysis for BPSC CCE PRELIMS.
Solved Previous Year Questions
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Which river is known as the 'Sorrow of Bihar'?
Detailed Explanation:
The Kosi River is known as the 'Sorrow of Bihar' due to its frequent devastating floods and unpredictable course changes.
Originating in Tibet and flowing through Nepal into Bihar, the river carries heavy silt deposits that raise its riverbed, causing it to shift course and flood vast areas, displacing millions—the 2008 flood alone affected over 3 million people.
Which of the following drainage systems drains the lands of Bihar?
Detailed Explanation:
Ghagra River (also called Ghaghara or Karnali) is a major tributary of the Ganga that enters Bihar from Uttar Pradesh and drains the northwestern districts of the state before joining the Ganga near Chhapra.
Mahanadi drains Chhattisgarh and Odisha, Yamuna flows through northern states but does not enter Bihar, and Narmada flows westward through Madhya Pradesh and Gujarat—none of these three rivers drain Bihar's lands.
Phalgu, a sacred river flowing in Bihar, is formed by the confluence of which of the following rivers?
Detailed Explanation:
The Phalgu River (also known as Niranjana River) is a sacred river in Bihar, particularly significant for Gaya and Bodh Gaya.
It is formed by the confluence of the Mohana River (also called Mohar) and the Lilajan River near Tikari in Gaya district.
The river is known for being mostly dry on the surface with water flowing underground, making it a seasonal and ephemeral river.
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Which is the Asia's largest and freshwater oxbow lake in Bihar?
Detailed Explanation:
Kanwar Lake in Begusarai district, Bihar, is Asia's largest freshwater oxbow lake, covering 2,620 hectares. It is Bihar's only Ramsar wetland site (designated 21-07-2020) and serves as a critical stopover for migratory birds on the Central Asian Flyway.
An oxbow lake forms when a river meander is cut off, creating a crescent-shaped water body. Kanwar Lake supports 165 plant species and 394 animal species, including 221 bird species, making it ecologically significant.
Therefore, Kanwar Lake is the correct answer, making Option 1 correct.
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