Defence Exams play a crucial role in shaping the future of aspiring candidates in India. These exams not only assess knowledge but also test the ability to apply concepts in real-world scenarios. Practicing MCQs and objective questions is essential for effective exam preparation, as it helps students identify important questions and enhances their understanding of key topics.
What You Will Practise Here
Fundamentals of Defence Studies
Key Historical Events and Their Impact
Important Defence Policies and Strategies
Current Affairs Related to National Security
Basic Concepts of Military Operations
Understanding Defence Technologies
Analysing Defence Budget and Expenditure
Exam Relevance
The topics covered in Defence Exams are highly relevant across various educational boards, including CBSE and State Boards, as well as competitive exams like NEET and JEE. Students can expect questions that focus on historical events, current affairs, and fundamental concepts related to defence. Common question patterns include multiple-choice questions that assess both theoretical knowledge and practical application.
Common Mistakes Students Make
Overlooking current affairs, which are often integrated into exam questions.
Confusing similar historical events or dates, leading to incorrect answers.
Neglecting the importance of definitions and key terms in objective questions.
Relying solely on rote memorization instead of understanding concepts.
FAQs
Question: What types of questions can I expect in Defence Exams? Answer: You can expect a mix of MCQs covering historical events, current affairs, and fundamental concepts related to defence.
Question: How can I improve my performance in Defence Exams? Answer: Regular practice of MCQs and understanding key concepts will significantly enhance your performance.
Start your journey towards success by solving practice MCQs today! Testing your understanding will not only boost your confidence but also prepare you for the important Defence Exams ahead.
Q. A river basin has an area of 200 km². If the average rainfall is 1000 mm per year, what is the total volume of water received by the basin in a year?
A.
200 million m³
B.
100 million m³
C.
300 million m³
D.
400 million m³
Solution
Volume = Area × Rainfall = 200 km² × 1000 mm = 200 km² × 1 m = 200 million m³.
Q. A river basin has an area of 200 square kilometers. If the average rainfall is 800 mm per year, how much water (in cubic meters) falls on the basin annually? (2019)
A.
160000000 m³
B.
200000000 m³
C.
240000000 m³
D.
320000000 m³
Solution
Water volume = Area × Rainfall = 200 km² × 800 mm = 200000000 m³.
Q. A river basin has an area of 2000 km². If the average rainfall is 800 mm per year, what is the total volume of water received by the basin in cubic meters? (2000)
A.
1.6 billion m³
B.
1.2 billion m³
C.
1 billion m³
D.
800 million m³
Solution
Volume = Area × Rainfall = 2000 km² × 0.8 m = 1.6 billion m³.
Q. A river basin has an area of 500 km². If the average rainfall is 800 mm per year, what is the total volume of water received by the basin in a year? (2019)
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. 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.
