Defence Exams MCQ & Objective Questions
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. What is the approximate temperature range of the Earth's mantle? (2020)
A.
200-400 °C
B.
500-900 °C
C.
1,000-3,000 °C
D.
3,000-5,000 °C
Show solution
Solution
The temperature of the Earth's mantle ranges from about 1,000 °C to 3,000 °C as you go deeper.
Correct Answer:
C
— 1,000-3,000 °C
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Q. What is the approximate temperature range of the Earth's outer core? (2020)
A.
1,000 - 2,000 °C
B.
2,000 - 4,000 °C
C.
4,000 - 6,000 °C
D.
6,000 - 8,000 °C
Show solution
Solution
The temperature of the Earth's outer core ranges from approximately 4,000 to 6,000 degrees Celsius.
Correct Answer:
C
— 4,000 - 6,000 °C
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Q. What is the approximate thickness of the Earth's crust? (2021)
A.
5-10 km
B.
30-50 km
C.
70-100 km
D.
100-150 km
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Solution
The Earth's crust varies in thickness, averaging about 30-50 km under continents and about 5-10 km under oceans.
Correct Answer:
B
— 30-50 km
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Q. What is the area of a circle with a diameter of 10 units?
A.
25π square units
B.
50π square units
C.
100π square units
D.
75π square units
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Solution
Area = π * (radius^2) = π * (5^2) = 25π square units.
Correct Answer:
A
— 25π square units
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Q. What is the area of a circle with a radius of 3 cm? (Use π ≈ 3.14)
A.
28.26 cm²
B.
9.42 cm²
C.
18.84 cm²
D.
12.56 cm²
Show solution
Solution
Area = π * radius² = 3.14 * 3² = 3.14 * 9 = 28.26 cm².
Correct Answer:
A
— 28.26 cm²
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Q. What is the area of a circle with a radius of 4 cm? (Use π = 3.14) (2022)
A.
50.24 cm²
B.
25.12 cm²
C.
12.56 cm²
D.
31.36 cm²
Show solution
Solution
Area = πr² = 3.14 * (4)² = 3.14 * 16 = 50.24 cm²
Correct Answer:
A
— 50.24 cm²
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Q. What is the area of a circle with a radius of 7 cm? (Use π = 22/7) (2019)
A.
154 cm²
B.
44 cm²
C.
77 cm²
D.
88 cm²
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Solution
Area = πr² = (22/7) × (7)² = (22/7) × 49 = 154 cm².
Correct Answer:
A
— 154 cm²
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Q. What is the area of a circle with a radius of 7 cm? (Use π ≈ 3.14)
A.
154 cm²
B.
100 cm²
C.
44 cm²
D.
78.5 cm²
Show solution
Solution
Area = πr² = 3.14 × (7)² = 3.14 × 49 = 153.86 cm², approximately 154 cm².
Correct Answer:
A
— 154 cm²
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Q. What is the area of a rectangle with length 8 cm and width 3 cm? (2021)
A.
24 cm²
B.
30 cm²
C.
20 cm²
D.
18 cm²
Show solution
Solution
Area = length × width = 8 cm × 3 cm = 24 cm².
Correct Answer:
A
— 24 cm²
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Q. What is the area of a sector of a circle with radius 10 cm and angle 90 degrees? (2022)
A.
25π cm²
B.
50π cm²
C.
100π cm²
D.
75π cm²
Show solution
Solution
Area of sector = (θ/360) × πr² = (90/360) × π × 10² = (1/4) × 100π = 25π cm².
Correct Answer:
A
— 25π cm²
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Q. What is the area of a sector of a circle with radius 6 cm and a central angle of 90 degrees? (2023)
A.
9π cm²
B.
12π cm²
C.
18π cm²
D.
6π cm²
Show solution
Solution
Area of sector = (θ/360) × πr² = (90/360) × π × 6² = (1/4) × 36π = 9π cm².
Correct Answer:
A
— 9π cm²
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Q. What is the area of a sector of a circle with radius 6 cm and angle 90 degrees? (2021)
A.
9π cm²
B.
12π cm²
C.
18π cm²
D.
6π cm²
Show solution
Solution
Area of sector = (θ/360) × πr² = (90/360) × π(6)² = (1/4) × 36π = 9π cm².
Correct Answer:
A
— 9π cm²
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Q. What is the area of a square with a side length of 8 cm? (2023)
A.
64 cm²
B.
32 cm²
C.
16 cm²
D.
48 cm²
Show solution
Solution
Area = side² = 8² = 64 cm²
Correct Answer:
A
— 64 cm²
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Q. What is the area of a trapezium with bases 5 cm and 7 cm, and height 4 cm? (2023)
A.
24 cm²
B.
20 cm²
C.
30 cm²
D.
28 cm²
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Solution
Area = 1/2 * (base1 + base2) * height = 1/2 * (5 + 7) * 4 = 24 cm²
Correct Answer:
A
— 24 cm²
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Q. What is the area of a triangle with a base of 10 units and a height of 5 units?
A.
25 square units
B.
50 square units
C.
15 square units
D.
30 square units
Show solution
Solution
Area = 1/2 * base * height = 1/2 * 10 * 5 = 25 square units.
Correct Answer:
A
— 25 square units
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Q. What is the area of a triangle with a base of 12 cm and a height of 5 cm? (2022)
A.
30 cm²
B.
60 cm²
C.
24 cm²
D.
36 cm²
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Solution
Area = 1/2 * base * height = 1/2 * 12 * 5 = 30 cm².
Correct Answer:
A
— 30 cm²
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Q. What is the area of a triangle with a base of 6 cm and a height of 4 cm?
A.
12 cm²
B.
24 cm²
C.
18 cm²
D.
30 cm²
Show solution
Solution
Area = 1/2 × base × height = 1/2 × 6 cm × 4 cm = 12 cm².
Correct Answer:
A
— 12 cm²
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Q. What is the area of a triangle with a base of 8 cm and a height of 5 cm? (2020)
A.
20 cm²
B.
30 cm²
C.
40 cm²
D.
10 cm²
Show solution
Solution
The area of a triangle is given by A = 1/2 * base * height. Here, A = 1/2 * 8 * 5 = 20 cm².
Correct Answer:
A
— 20 cm²
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Q. What is the area of an equilateral triangle with a side length of 6 cm? (2022)
A.
9√3 cm²
B.
12√3 cm²
C.
18√3 cm²
D.
24√3 cm²
Show solution
Solution
Area = (√3/4) * side² = (√3/4) * 6² = (√3/4) * 36 = 9√3 cm².
Correct Answer:
A
— 9√3 cm²
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Q. What is the area under the curve y = 1/x from x = 1 to x = 4?
A.
ln(4)
B.
ln(3)
C.
ln(2)
D.
ln(1)
Show solution
Solution
The area under the curve is given by ∫(from 1 to 4) (1/x) dx = [ln(x)] from 1 to 4 = ln(4) - ln(1) = ln(4).
Correct Answer:
A
— ln(4)
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Q. What is the area under the curve y = 2x^2 + 3 from x = 0 to x = 2?
Show solution
Solution
The area under the curve is given by ∫(from 0 to 2) (2x^2 + 3) dx = [(2/3)x^3 + 3x] from 0 to 2 = (16/3 + 6) = 10.
Correct Answer:
B
— 12
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Q. What is the average atmospheric pressure at sea level in hPa?
A.
1013.25 hPa
B.
1000 hPa
C.
1020 hPa
D.
980 hPa
Show solution
Solution
The average atmospheric pressure at sea level is approximately 1013.25 hPa.
Correct Answer:
A
— 1013.25 hPa
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Q. What is the average atmospheric pressure at sea level in millibars? (2021)
A.
1013.25 mb
B.
1000 mb
C.
1020 mb
D.
980 mb
Show solution
Solution
The average atmospheric pressure at sea level is defined as 1013.25 millibars.
Correct Answer:
A
— 1013.25 mb
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Q. What is the average density of the Earth? (2020)
A.
2.5 g/cm³
B.
5.5 g/cm³
C.
7.5 g/cm³
D.
9.5 g/cm³
Show solution
Solution
The average density of the Earth is about 5.5 g/cm³, which is higher than the density of the crust.
Correct Answer:
B
— 5.5 g/cm³
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Q. What is the average temperature of a location if the maximum temperature recorded is 30°C and the minimum is 20°C? (2021)
A.
25°C
B.
20°C
C.
30°C
D.
15°C
Show solution
Solution
Average temperature = (Maximum + Minimum) / 2 = (30 + 20) / 2 = 25°C.
Correct Answer:
A
— 25°C
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Q. What is the average temperature of the Earth in degrees Celsius?
A.
15°C
B.
20°C
C.
25°C
D.
30°C
Show solution
Solution
The average temperature of the Earth is approximately 15°C.
Correct Answer:
A
— 15°C
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Q. What is the axis of symmetry for the parabola given by the equation y = -3(x - 2)^2 + 5?
A.
x = 2
B.
y = 5
C.
y = -3
D.
x = -2
Show solution
Solution
The axis of symmetry for a parabola in vertex form y = a(x - h)^2 + k is x = h. Here, h = 2.
Correct Answer:
A
— x = 2
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Q. What is the axis of symmetry for the parabola given by the equation y^2 = 6x?
A.
x-axis
B.
y-axis
C.
y = x
D.
x = 0
Show solution
Solution
The axis of symmetry for the parabola y^2 = 4px is the x-axis.
Correct Answer:
B
— y-axis
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Q. What is the balanced equation for the combustion of propane (C3H8)? (2021)
A.
C3H8 + 5O2 → 3CO2 + 4H2O
B.
C3H8 + 4O2 → 3CO2 + 2H2O
C.
C3H8 + 3O2 → 3CO + 4H2O
D.
C3H8 + 2O2 → 3CO2 + 2H2O
Show solution
Solution
The balanced equation for the combustion of propane is C3H8 + 5O2 → 3CO2 + 4H2O.
Correct Answer:
A
— C3H8 + 5O2 → 3CO2 + 4H2O
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Q. What is the caloric value of one gram of fat?
A.
4 calories
B.
7 calories
C.
9 calories
D.
12 calories
Show solution
Solution
One gram of fat provides approximately 9 calories, making it the most energy-dense macronutrient.
Correct Answer:
C
— 9 calories
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