Q31. Which of the following highlights the most appropriate economic significance of the Danube River in Europe?
Major Rivers and Lakes of the World: RAS Prelims MCQs
80 RAS Prelims MCQs on the major rivers and lakes of the world cover the longest rivers, tributaries, deltas, lake basins and river features. The Amazon and its tributaries, the Congo at the Equator, the Volga and the Caspian, the Mississippi delta and the Aral Sea are tested, and the explanations link each river to its basin and mouth.
Practice questions based on the RPSC RAS Prelims syllabus. They follow the exam pattern but are not past-paper questions.
Showing 31–40 of 80 questions
Q32. Consider the following statements about the Caspian Sea:
I. It is technically classified as the world’s largest lake by surface area.
II. It is an endorheic basin with no natural outflows to the global ocean.
III. The Volga River is the primary source of its freshwater inflow.
IV. It contains strictly freshwater with zero salinity throughout its volume.
Which of the above statement(s) is/are correct?
I. It is technically classified as the world’s largest lake by surface area.
II. It is an endorheic basin with no natural outflows to the global ocean.
III. The Volga River is the primary source of its freshwater inflow.
IV. It contains strictly freshwater with zero salinity throughout its volume.
Which of the above statement(s) is/are correct?
Explanation
The Caspian Sea is the largest inland body of water on Earth and is technically classified as a lake. It occupies an endorheic basin, meaning it has no natural outflows. The Volga River provides the majority of its freshwater inflow. Despite this inflow, the sea is not strictly freshwater; it contains significant salinity, making it a brackish environment.
Q33. By total volume of water discharged, which river is recognized as the second largest in the world?
Explanation
When measuring rivers by the total volume of water they discharge into the ocean, the Amazon River ranks first globally. The Congo River, located in Central Africa, holds the position of the second-largest river by discharge. This high volume is primarily due to the heavy year-round rainfall characteristic of the equatorial regions through which the river flows.
Q34. What defines a tectonic lake in geographical classification?
Explanation
Tectonic lakes are formed through the movement of the Earth’s crust. When tectonic plates shift, they can create significant depressions or basins through faulting, folding, or subsidence. These low-lying areas eventually fill with water from precipitation or rivers. Examples include the East African Rift lakes and Lake Baikal, which are characterized by their great depth and elongated shapes.
Q35. Match List-I (Siberian River) with List-II (Associated Feature/Region) and select the correct option:
| Siberian River | Associated Feature/Region |
|---|---|
| A. Ob | i. Empties into the Laptev Sea |
| B. Yenisei | ii. Forms the Gulf of Ob before entering the Kara Sea |
| C. Lena | iii. Drains into the Caspian Sea |
| D. Volga | iv. Originates in Mongolia and flows through Central Siberia |
Explanation
Siberian and Russian rivers are defined by their specific drainage basins. The Ob River forms the extensive Gulf of Ob before entering the Kara Sea. The Yenisei originates in Mongolia and flows through Central Siberia. The Lena River empties into the Laptev Sea in the far north. The Volga, though in European Russia, flows south into the Caspian Sea.
Q36. Which of the following pairs is correctly matched regarding a river and its distinctive geographic feature?
Explanation
Geographical features often define major river systems. The Amazon River drains into the Atlantic Ocean, while the Sundarbans delta is associated with the Ganges-Brahmaputra. The Congo River crosses the Equator, not the Tropic of Cancer. The Huang He flows through arid and semi-arid regions. Correctly, the Mississippi River system discharges its waters into the Gulf of Mexico in North America.
Q37. Which of the following South American countries does NOT encompass any part of the vast Amazon River drainage basin?
Explanation
The Amazon drainage basin is the largest in the world, covering a vast area of South America. It includes territories in Brazil, Peru, Colombia, Bolivia, and several other nations. Chile, however, is located on the western side of the Andes Mountains. Because the mountains act as a drainage divide, all Chilean rivers flow westward into the Pacific Ocean.
Q38. Consider the following statements regarding the classification of rivers:
I. Antecedent rivers maintain their path despite tectonic uplift.
II. Superimposed rivers develop on a newer surface cover and maintain their course as they erode into underlying older rock structures.
III. Consequent rivers flow in a direction opposite to the initial slope of the land.
IV. Subsequent rivers develop after the consequent river and follow belts of weaker rock.
V. Insequent rivers lack obvious structural or regional geological controls on their path.
Which of the above statement(s) is/are correct?
I. Antecedent rivers maintain their path despite tectonic uplift.
II. Superimposed rivers develop on a newer surface cover and maintain their course as they erode into underlying older rock structures.
III. Consequent rivers flow in a direction opposite to the initial slope of the land.
IV. Subsequent rivers develop after the consequent river and follow belts of weaker rock.
V. Insequent rivers lack obvious structural or regional geological controls on their path.
Which of the above statement(s) is/are correct?
Explanation
Drainage systems are classified by their relationship to geological structures. Antecedent and superimposed rivers maintain their paths despite surface changes. Subsequent rivers follow zones of weakness, while insequent rivers show no structural control. Consequent rivers are defined by their alignment with the original slope of the land, rather than flowing in the opposite direction of the initial topographic gradient.
Q39. Read the following statements regarding Lake Victoria and select the correct option:
Statement I: Lake Victoria is the largest lake in Africa by surface area.
Statement II: The Equator passes directly through Lake Victoria.
Which of the following is correct?
Statement I: Lake Victoria is the largest lake in Africa by surface area.
Statement II: The Equator passes directly through Lake Victoria.
Which of the following is correct?
Explanation
Lake Victoria is a significant geographical feature located in East Africa. It is the largest lake on the African continent by surface area and the world’s largest tropical lake. Furthermore, the Equator passes directly through the northern portion of the lake. It serves as the primary reservoir for the White Nile, supporting millions of people in the region.
Q40. Out of the Great Lakes of North America, which is the only one located entirely within the borders of the United States?
Explanation
The Great Lakes of North America consist of five interconnected freshwater bodies. While four of these lakes--Superior, Huron, Erie, and Ontario--serve as a natural border between the United States and Canada, Lake Michigan is unique. It is the only Great Lake situated entirely within the territorial boundaries of the United States, surrounded by several Midwestern states.Answer key for these questions
| Q | Correct answer |
|---|---|
| 31 | (a) It connects major capitals as a transnational transport route |
| 32 | (a) I, II, and III only |
| 33 | (b) Congo River |
| 34 | (a) A lake formed in depressions caused by crustal faulting |
| 35 | (c) A-ii, B-iv, C-i, D-iii |
| 36 | (d) Mississippi River - Drains into the Gulf of Mexico |
| 37 | (c) Chile |
| 38 | (a) I, II, IV, and V |
| 39 | (a) Both Statement I and Statement II are correct. |
| 40 | (a) Lake Michigan |
Key facts from Major Rivers and Lakes of the World
- By the usual measurements the longest rivers run in the order Nile, Amazon, Yangtze, Mississippi-Missouri.
- The Rio Negro is a major left-bank tributary of the Amazon.
- The Congo River crosses the Equator twice.
- The Volga, the longest river of Europe, drains into the Caspian Sea; the Thames passes through London.
- The Mississippi forms a bird’s-foot delta; the Huang He carries yellow silt from the Loess Plateau.
- The Aral Sea has shrunk mainly because rivers were diverted for large-scale irrigation; Lake Tanganyika is the second deepest lake in the world.
Frequently asked questions
How many RAS Prelims practice MCQs are there on Major Rivers and Lakes of the World?
This page has 80 practice MCQs on Major Rivers and Lakes of the World (World Geography). Each has the correct answer, and most have an explanation.
Which river crosses the Equator twice?
The Congo River in Africa. It flows through both hemispheres, which gives its basin rainfall in all seasons and makes it a river with a very steady flow.
Why has the Aral Sea shrunk?
Because the rivers that fed it, the Amu Darya and Syr Darya, were diverted for large-scale irrigation of cotton and other crops. With little inflow, the lake lost most of its area and became a major environmental disaster.
Where does the Volga drain?
Into the Caspian Sea. The Volga is the longest river in Europe, and because the Caspian is an inland sea, the river is an example of inland drainage.