River System & Tributaries MCQs

Assam General Knowledge

Module 21: Assam Maps, Locations & Physical Features MCQs

Topic: River System & Tributaries MCQs

Sub-Topic I: Overview of Assam’s River System

Q1. The river system of Assam is dominated by which major river?

A. Barak
B. Subansiri
C. Kopili
D. Brahmaputra

Correct Answer: D. Brahmaputra

Explanation:
The Brahmaputra River is the lifeline of Assam, forming the largest river system and shaping the state’s geography, economy, and settlement patterns.

Q2. The Brahmaputra enters Assam from which direction?

A. South
B. West
C. East
D. North

Correct Answer: C. East

Explanation:
The Brahmaputra enters Assam from Arunachal Pradesh in the east, flowing westward across the Assam valley.

Q3. Which river system dominates southern Assam (Barak Valley)?

A. Brahmaputra system
B. Kopili system
C. Barak system
D. Dhansiri system

Correct Answer: C. Barak system

Explanation:
Southern Assam is drained mainly by the Barak River system, which is distinct from the Brahmaputra basin.

Q4. Assam’s rivers primarily drain into which water body?

A. Bay of Bengal
B. Arabian Sea
C. Indian Ocean directly
D. Andaman Sea

Correct Answer: A. Bay of Bengal

Explanation:
Both the Brahmaputra and Barak river systems ultimately drain into the Bay of Bengal.

Q5. Assam’s river system is most closely associated with which physical region?

A. Deccan Plateau
B. Himalayan foothills
C. Coastal plains
D. Western Ghats

Correct Answer: B. Himalayan foothills

Explanation:
Most rivers originate from the Eastern Himalayas and Patkai ranges, flowing through Assam’s plains.

Sub-Topic II: The Brahmaputra River in Assam

Q6. What is the local name of the Brahmaputra in Assam?

A. Tsangpo
B. Jamuna
C. Luit
D. Meghna

Correct Answer: C. Luit

Explanation:
In Assamese tradition, the Brahmaputra is affectionately known as the Luit, reflecting its cultural significance.

Q7. The Brahmaputra flows through Assam from:

A. South to North
B. North to South
C. East to West
D. West to East

Correct Answer: C. East to West

Explanation:
Across Assam, the river follows an east-to-west course, forming the extensive Brahmaputra Valley.

Q8. Which characteristic is typical of the Brahmaputra in Assam?

A. Narrow and deep channel
B. Slow-moving with rocky bed
C. Braided channel with sandbars
D. Underground flow

Correct Answer: C. Braided channel with sandbars

Explanation:
The Brahmaputra is a braided river, known for chars (riverine islands) and shifting channels.

Q9. Floods in Assam are mainly caused by:

A. Tidal waves
B. Volcanic activity
C. Brahmaputra and its tributaries
D. Groundwater rise

Correct Answer: C. Brahmaputra and its tributaries

Explanation:
Heavy monsoon rainfall and silt-laden tributaries make the Brahmaputra highly flood-prone.

Q10. Which island in the Brahmaputra is one of the world’s largest river islands?

A. Majuli
B. Umananda
C. Dibru
D. Panidihing

Correct Answer: A. Majuli

Explanation:
Majuli, formed by the Brahmaputra and its tributaries, is among the largest river islands in the world.

Sub-Topic III: North Bank Tributaries of the Brahmaputra

Q11. Which is the largest tributary of the Brahmaputra in Assam?

A. Kopili
B. Subansiri
C. Dhansiri (South)
D. Barak

Correct Answer: B. Subansiri

Explanation:
The Subansiri River is the largest north bank tributary, originating in the Himalayas.

Q12. The Subansiri River originates from:

A. Patkai Range
B. Garo Hills
C. Eastern Himalayas
D. Karbi Plateau

Correct Answer: C. Eastern Himalayas

Explanation:
Subansiri rises in the Eastern Himalayas, bringing heavy sediment into the Brahmaputra.

Q13. Which of the following is a north bank tributary?

A. Kopili
B. Burhidihing
C. Dhansiri (South)
D. Barak

Correct Answer: B. Burhidihing

Explanation:
Burhidihing flows from the Patkai range and joins the Brahmaputra from the north bank.

Q14. Jia-Bharali (Kameng) River enters Assam from:

A. Meghalaya
B. Arunachal Pradesh
C. Nagaland
D. Manipur

Correct Answer: B. Arunachal Pradesh

Explanation:
The Jia-Bharali (Kameng) originates in Arunachal Pradesh and enters Assam from the north.

Q15. North bank tributaries are generally:

A. Short and slow
B. Glacier-fed and turbulent
C. Tidal in nature
D. Artificial canals

Correct Answer: B. Glacier-fed and turbulent

Explanation:
Originating in the Himalayas, north bank tributaries are fast-flowing and erosion-prone.

Sub-Topic IV: South Bank Tributaries of the Brahmaputra

Q16. Which is the most important south bank tributary of the Brahmaputra?

A. Manas
B. Kopili
C. Barak
D. Subansiri

Correct Answer: B. Kopili

Explanation:
The Kopili River is a major south bank tributary draining the Karbi Anglong plateau.

Q17. The Manas River is significant because it:

A. Forms a delta
B. Flows only in plains
C. Is associated with a national park
D. Is a tributary of Barak

Correct Answer: C. Is associated with a national park

Explanation:
The Manas River flows through Manas National Park, a UNESCO World Heritage Site.

Q18. Dhansiri (South) originates from which region?

A. Eastern Himalayas
B. Patkai Range
C. Karbi Anglong Plateau
D. Garo Hills

Correct Answer: C. Karbi Anglong Plateau

Explanation:
The Dhansiri (South) drains the Karbi Anglong plateau before joining the Brahmaputra.

Q19. South bank tributaries are generally:

A. Longer than north bank rivers
B. Less turbulent
C. More silt-laden
D. Tidal rivers

Correct Answer: B. Less turbulent

Explanation:
Compared to Himalayan rivers, south bank tributaries are shorter and less turbulent.

Q20. Which south bank tributary flows partly through Meghalaya?

A. Kopili
B. Manas
C. Subansiri
D. Jia-Bharali

Correct Answer: A. Kopili

Explanation:
The Kopili River originates in the Meghalaya Plateau before entering Assam.

Sub-Topic V: Barak River System (Southern Assam)

Q21. The Barak River flows mainly through which region of Assam?

A. Upper Assam
B. Central Assam
C. Barak Valley
D. North Bank Plains

Correct Answer: C. Barak Valley

Explanation:
The Barak River drains southern Assam, forming the Barak Valley.

Q22. The Barak River splits into which two rivers in Bangladesh?

A. Padma and Meghna
B. Surma and Kushiyara
C. Jamuna and Teesta
D. Feni and Karnaphuli

Correct Answer: B. Surma and Kushiyara

Explanation:
After leaving India, the Barak divides into the Surma and Kushiyara rivers.

Q23. Which is a major tributary of the Barak River?

A. Kopili
B. Dhaleswari
C. Jatinga
D. Subansiri

Correct Answer: C. Jatinga

Explanation:
Jatinga River is an important tributary of the Barak system in southern Assam.

Q24. Compared to the Brahmaputra, the Barak River is:

A. Wider
B. Longer
C. Narrower and slower
D. Glacier-fed

Correct Answer: C. Narrower and slower

Explanation:
The Barak is narrower and relatively slow-flowing, with fewer braided channels.

Q25. The Barak River system mainly supports:

A. Tea cultivation only
B. Inland navigation
C. Wet rice cultivation
D. Desert agriculture

Correct Answer: C. Wet rice cultivation

Explanation:
Barak Valley rivers support paddy cultivation through fertile alluvial soils.

Sub-Topic VI: Exam-Oriented Analytical & Map-Based Questions

Q26. Which river system is more flood-prone in Assam?

A. Barak system
B. Kopili system
C. Brahmaputra system
D. Dhansiri system

Correct Answer: C. Brahmaputra system

Explanation:
The Brahmaputra’s large catchment, heavy rainfall, and silt load make it extremely flood-prone.

Q27. River systems of Assam are important for:

A. Only transportation
B. Agriculture and ecology
C. Mining activities
D. Urban planning only

Correct Answer: B. Agriculture and ecology

Explanation:
Rivers sustain agriculture, wetlands, biodiversity, and livelihoods in Assam.

Q28. Which factor most influences river erosion in Assam?

A. Wind action
B. Heavy monsoon rainfall
C. Earthquakes only
D. Tidal waves

Correct Answer: B. Heavy monsoon rainfall

Explanation:
Intense monsoon rainfall causes floods, erosion, and channel shifting.

Q29. Balanced river management in Assam is important to:

A. Stop all floods
B. Reduce agriculture
C. Control erosion and sustain livelihoods
D. Eliminate wetlands

Correct Answer: C. Control erosion and sustain livelihoods

Explanation:
Effective management helps reduce flood damage while preserving ecological balance.

Q30. Why are river system questions frequently asked in Assam GK exams?

A. They are static facts only
B. They link geography, economy, and environment
C. They are rarely updated
D. They have no practical relevance

Correct Answer: B. They link geography, economy, and environment

Explanation:
River systems connect physical geography with agriculture, floods, ecology, and development, making them high-value exam topics.

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🔹 Why River System & Tributaries MCQs Are Important for Assam Exams

This comprehensive set of Assam River System & Tributaries MCQs is designed to strengthen candidates’ understanding of Brahmaputra and Barak river systems, north and south bank tributaries, flood behaviour, and regional geography of Assam.

Prepared strictly according to the Assam-specific General Knowledge syllabus, these MCQs are highly relevant for APSC, UPSC, Assam Police, TET, Forest, Banking, Grade III & IV, CEE, and all SEBA, AHSEC, ASSEB, CBSE, college, and university-level examinations across Assam. Regular practice of river-based questions helps aspirants connect maps, physical geography, environment, agriculture, and disaster management, a core focus area in Assam GK exams.

🔹 FAQ Section

FAQ 1: Are these Assam River System MCQs useful for APSC and Assam Police exams?

Yes. These MCQs are fully aligned with the APSC Assam General Knowledge syllabus and cover high-frequency exam topics.

FAQ 2: Do these questions cover both Brahmaputra and Barak river systems?

Yes. The MCQs comprehensively cover the Brahmaputra system, Barak system, and their important tributaries.

FAQ 3: Are these MCQs suitable for Assam school board exams?

Absolutely. They are equally relevant for SEBA, AHSEC, ASSEB, CBSE, and CEE, as well as college and university exams.

FAQ 4: Do the MCQs include easy explanations for beginners?

Yes. Each MCQ includes a clear, concept-based explanation, making it ideal for beginners and advanced aspirants alike.

FAQ 5: How should students study river system MCQs effectively?

Students should revise these MCQs along with Assam maps, flood-related topics, and physical geography notes, especially for prelims.