Q. A river flows through a region with a soil erosion rate of 5 tons per hectare per year. If the area of the watershed is 100 hectares, how much soil is eroded in a year?
Q. A river flows through a region with a soil retention capacity of 20% of its volume. If the river has a volume of 1000 m³, how much water can be retained by the soil? (2023)
A.
100 m³
B.
200 m³
C.
300 m³
D.
400 m³
Solution
Water retained = 20% of 1000 m³ = 0.2 × 1000 m³ = 200 m³.
Q. A river flows through a valley with a gradient of 1 in 1000. If the river descends 2 meters over a distance of 2000 meters, is the gradient consistent? (2023)
A.
Yes
B.
No
C.
Not enough information
D.
Depends on the soil type
Solution
Gradient = Rise / Run = 2 m / 2000 m = 1 in 1000, so it is consistent.
Q. A river flows through a valley with a gradient of 1:1000. If the river descends 2 meters over a distance of 2000 meters, is the gradient consistent? (2022)
A.
Yes
B.
No
C.
Not enough information
D.
Depends on the soil type
Solution
Gradient = Rise / Run = 2 m / 2000 m = 1:1000, so it is consistent.
Q. A river has a length of 150 km and a width of 50 m. If the average depth is 3 m, what is the approximate volume of water in the river in cubic meters?
A.
22500000
B.
2250000
C.
15000000
D.
30000000
Solution
Volume = Length × Width × Depth = 150000 m × 50 m × 3 m = 22500000 m³.
Q. A river has a width of 300 meters and a depth of 5 meters. What is the volume of water flowing through the river in one second if the flow speed is 2 m/s? (2020)
A.
3000 m³/s
B.
6000 m³/s
C.
1500 m³/s
D.
1200 m³/s
Solution
Volume = Width × Depth × Speed = 300 m × 5 m × 2 m/s = 3000 m³/s.
Q. A river is 300 m wide. If a person swims across the river at a speed of 2 m/s and the river flows at 1 m/s, how long will it take to cross the river? (2020)
A.
150 s
B.
100 s
C.
200 s
D.
300 s
Solution
Time = Distance / Speed. The effective speed across the river is 2 m/s. Time = 300 m / 2 m/s = 150 s.
Q. A river meanders and has a total length of 150 km. If the straight-line distance from the source to the mouth is 100 km, what is the river's meandering ratio? (2023)
A.
1.5
B.
1.2
C.
1.3
D.
1.4
Solution
Meandering ratio = Total length / Straight-line distance = 150 km / 100 km = 1.5.
Q. A river's depth increases by 2 meters due to rainfall. If the river's width is 50 meters, what is the increase in volume per kilometer of the river? (2020)
A.
100,000 m³
B.
200,000 m³
C.
300,000 m³
D.
400,000 m³
Solution
Increase in volume = Width × Depth × Length = 50 m × 2 m × 1000 m = 100,000 m³.
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.
General Knowledge (NDA) is a crucial component of various competitive exams, including the NDA entrance test. Mastering this subject not only enhances your awareness of current affairs but also significantly boosts your exam scores. Practicing MCQs and objective questions helps you identify important topics and improves your ability to tackle exam questions effectively. By engaging with practice questions, you can solidify your understanding and prepare thoroughly for your upcoming exams.
What You Will Practise Here
Current Affairs: National and International Events
History: Key Dates and Important Figures
Geography: Physical and Political Maps
Indian Polity: Constitution and Governance
Economics: Basic Concepts and Terminology
Science: Fundamental Principles and Discoveries
General Awareness: Sports, Awards, and Recognitions
Exam Relevance
General Knowledge is a significant section in various exams such as CBSE, State Boards, NEET, and JEE. In these assessments, you can expect questions that test your understanding of historical events, geographical facts, and current affairs. Common question patterns include multiple-choice questions that require you to select the correct answer from a set of options, making it essential to be well-prepared with important General Knowledge (NDA) questions for exams.
Common Mistakes Students Make
Overlooking current affairs, assuming they are less important.
Confusing similar historical events or dates.
Neglecting to revise basic geographical concepts.
Misunderstanding key terms in Indian polity and governance.
Failing to connect economic principles with real-world scenarios.
FAQs
Question: What are the best ways to prepare for General Knowledge (NDA)? Answer: Regularly read newspapers, follow current affairs, and practice MCQs to enhance your knowledge.
Question: How can I improve my speed in answering General Knowledge questions? Answer: Time yourself while practicing and focus on understanding concepts rather than rote memorization.
Start your journey towards mastering General Knowledge (NDA) today! Solve practice MCQs and test your understanding to ensure you are well-prepared for your exams. Every question you tackle brings you one step closer to success!
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