Q. A river's sediment load is measured at 200 kg per cubic meter of water. If the river has a flow of 100 m³/s, what is the sediment load per second? (2023)
A.
200 kg/s
B.
400 kg/s
C.
600 kg/s
D.
800 kg/s
Solution
Sediment load per second = Sediment load per m³ x Flow rate = 200 kg/m³ x 100 m³/s = 20,000 kg/s.
Q. If a river basin has an area of 2000 km² and receives an average rainfall of 800 mm per year, what is the total volume of water received by the basin in cubic meters? (2000)
A.
1600000000
B.
16000000
C.
160000000
D.
16000000000
Solution
Volume = Area × Rainfall = 2000 km² × 800 mm = 2000 × 10^6 m² × 0.8 m = 1600000000 m³.
Q. If a river basin has an area of 500 km² and receives an average rainfall of 800 mm annually, what is the total volume of water received by the basin in cubic meters? (2022)
A.
400,000,000 m³
B.
500,000,000 m³
C.
600,000,000 m³
D.
700,000,000 m³
Solution
Volume = Area × Rainfall = 500 km² × 800 mm = 500,000,000 m³.
Q. If a river has a discharge of 500 cubic meters per second and the cross-sectional area of the river is 100 square meters, what is the velocity of the river?
A.
2 m/s
B.
5 m/s
C.
10 m/s
D.
20 m/s
Solution
Velocity = Discharge / Area = 500 m³/s / 100 m² = 5 m/s.
Q. If a river has a sediment transport capacity of 200 kg/m³ and flows at a rate of 10 m³/s, what is the total sediment transported in one hour? (2000)
A.
72000 kg
B.
60000 kg
C.
360000 kg
D.
120000 kg
Solution
Total sediment = Sediment capacity × Flow rate × Time = 200 kg/m³ × 10 m³/s × 3600 s = 7200000 kg.
Q. If a river is 300 meters wide and the current flows at 2 m/s, how long will it take a swimmer to cross the river if he swims at a speed of 1 m/s perpendicular to the current?
A.
300 seconds
B.
150 seconds
C.
200 seconds
D.
100 seconds
Solution
Time to cross = Width / Speed across = 300 m / 1 m/s = 300 seconds.
The study of "Rivers & Soil" is crucial for students preparing for various exams in India. This topic not only forms a significant part of the syllabus but also helps in understanding essential concepts related to geography and environmental science. Practicing MCQs and objective questions on Rivers & Soil can enhance your exam preparation, allowing you to score better by familiarizing yourself with important questions and concepts.
What You Will Practise Here
Key characteristics and types of rivers
Soil formation processes and types of soil
The water cycle and its impact on rivers
Importance of rivers in agriculture and ecosystem
Soil erosion and conservation techniques
Diagrams illustrating river systems and soil profiles
Definitions of important terms related to rivers and soil
Exam Relevance
The topic of Rivers & Soil is frequently featured in CBSE, State Boards, and competitive exams like NEET and JEE. Students can expect questions that test their understanding of river systems, soil types, and their significance in the environment. Common question patterns include multiple-choice questions that require students to identify key concepts, apply definitions, and analyze diagrams related to these topics.
Common Mistakes Students Make
Confusing different types of soil and their properties
Misunderstanding the water cycle and its stages
Overlooking the importance of rivers in ecological balance
Neglecting to study diagrams, which are crucial for visual understanding
FAQs
Question: What are the main types of soil found in India? Answer: The main types of soil in India include alluvial soil, black soil, red soil, and laterite soil, each with distinct characteristics and agricultural significance.
Question: How do rivers contribute to agriculture? Answer: Rivers provide essential water resources for irrigation, support fertile soil deposition, and play a vital role in maintaining the agricultural ecosystem.
Start your journey towards mastering Rivers & Soil by solving practice MCQs today! Test your understanding and boost your confidence for upcoming exams.
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