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 value of √(16) + √(25)? (2021)
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Solution
√(16) = 4 and √(25) = 5, so 4 + 5 = 9.
Correct Answer:
C
— 11
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Q. What is the variance of the following numbers: 1, 1, 1, 1, 1?
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Solution
All values are the same, so variance = 0.
Correct Answer:
A
— 0
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Q. What is the variance of the following numbers: 1, 2, 3, 4, 5, 6? (2022)
A.
2.5
B.
3.5
C.
4.5
D.
5.5
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Solution
Mean = (1 + 2 + 3 + 4 + 5 + 6) / 6 = 3.5. Variance = [(1-3.5)² + (2-3.5)² + (3-3.5)² + (4-3.5)² + (5-3.5)² + (6-3.5)²] / 6 = 2.92 (approx 2.5).
Correct Answer:
A
— 2.5
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Q. What is the variance of the following numbers: 2, 4, 4, 4, 5, 5, 7, 9?
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Solution
Mean = 5. Variance = [(2-5)² + (4-5)² + (4-5)² + (4-5)² + (5-5)² + (5-5)² + (7-5)² + (9-5)²] / 8 = 6.
Correct Answer:
B
— 6
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Q. What is the variance of the following numbers: 5, 5, 5, 5? (2019)
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Solution
All values are the same, so variance = 0.
Correct Answer:
A
— 0
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Q. What is the variance of the following numbers: 5, 7, 9, 11? (2020)
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Solution
Mean = (5 + 7 + 9 + 11) / 4 = 8. Variance = [(5-8)² + (7-8)² + (9-8)² + (11-8)²] / 4 = 4.
Correct Answer:
A
— 4
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Q. What is the variance of the numbers: 1, 1, 1, 1, 1? (2023)
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Solution
All values are the same, so variance = 0.
Correct Answer:
A
— 0
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Q. What is the variance of the numbers: 5, 5, 5, 5? (2023)
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Solution
All values are the same, so variance = 0.
Correct Answer:
A
— 0
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Q. What is the vertex of the parabola given by the equation y = 2x^2 - 4x + 1?
A.
(1, -1)
B.
(1, 0)
C.
(2, 1)
D.
(0, 1)
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Solution
To find the vertex, use the formula x = -b/(2a). Here, a = 2, b = -4, so x = 1. Substitute x = 1 into the equation to find y = -1.
Correct Answer:
A
— (1, -1)
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Q. What is the vertex of the parabola represented by the equation y = 3x^2 - 12x + 7? (2023)
A.
(2, -5)
B.
(2, -1)
C.
(2, 1)
D.
(2, 5)
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Solution
The vertex can be found using x = -b/(2a). Here, x = 12/(2*3) = 2. Substituting x = 2 into the equation gives y = 3(2)^2 - 12(2) + 7 = -5.
Correct Answer:
A
— (2, -5)
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Q. What is the vertex of the quadratic function f(x) = 2x^2 - 8x + 5? (2021)
A.
(2, -3)
B.
(2, -7)
C.
(4, -3)
D.
(4, -7)
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Solution
The vertex can be found using x = -b/(2a). Here, x = 8/(2*2) = 2. Substituting x = 2 into f(x) gives f(2) = -3, so the vertex is (2, -3).
Correct Answer:
A
— (2, -3)
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Q. What is the volume of a cube with a side length of 4 units?
A.
16 cubic units
B.
64 cubic units
C.
32 cubic units
D.
48 cubic units
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Solution
Volume = side^3 = 4^3 = 64 cubic units.
Correct Answer:
B
— 64 cubic units
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Q. What is the volume of a cube with a side length of 5 cm? (2022)
A.
25 cm³
B.
50 cm³
C.
125 cm³
D.
150 cm³
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Solution
The volume of a cube is given by V = side³. For a side length of 5 cm, V = 5³ = 125 cm³.
Correct Answer:
C
— 125 cm³
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Q. What is the wind chill factor at a temperature of -5°C with a wind speed of 20 km/h? (2020)
A.
-10°C
B.
-15°C
C.
-5°C
D.
-20°C
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Solution
Using the wind chill formula, Wind Chill = 13.12 + 0.6215*T - 11.37*(V^0.16) + 0.3965*T*(V^0.16), we find it to be approximately -15°C.
Correct Answer:
B
— -15°C
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Q. What is the work done by a force of 15 N moving an object 4 m in the direction of the force? (2022)
A.
60 J
B.
30 J
C.
45 J
D.
75 J
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Solution
Work done (W) = Force (F) × Distance (d) = 15 N × 4 m = 60 J.
Correct Answer:
A
— 60 J
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Q. What is the work done by a force of 25 N moving an object 4 m at an angle of 60° to the direction of the force? (2019)
A.
50 J
B.
100 J
C.
75 J
D.
25 J
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Solution
Work done = F × d × cos(θ) = 25 N × 4 m × cos(60°) = 25 N × 4 m × 0.5 = 50 J.
Correct Answer:
C
— 75 J
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Q. What is the work done on a gas when it is compressed isothermally from 4 L to 2 L at a pressure of 1 atm? (2021)
A.
2.0 L·atm
B.
4.0 L·atm
C.
6.0 L·atm
D.
8.0 L·atm
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Solution
Work done (W) = PΔV = 1 atm * (2 L - 4 L) = 2 L·atm.
Correct Answer:
B
— 4.0 L·atm
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Q. What is the work done when a force of 25 N moves an object 4 m at an angle of 60° to the direction of the force? (2019)
A.
50 J
B.
100 J
C.
75 J
D.
25 J
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Solution
Work done = Fd cos(θ) = 25 N × 4 m × cos(60°) = 25 N × 4 m × 0.5 = 50 J
Correct Answer:
C
— 75 J
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Q. What is the work done when a force of 25 N moves an object 8 m in the direction of the force? (2023)
A.
200 J
B.
150 J
C.
300 J
D.
100 J
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Solution
Work done (W) = F × d = 25 N × 8 m = 200 J.
Correct Answer:
A
— 200 J
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Q. What is the work done when a force of 5 N moves an object 3 m in the direction of the force?
A.
15 J
B.
5 J
C.
10 J
D.
20 J
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Solution
Work done (W) = Force (F) × Distance (d) = 5 N × 3 m = 15 J.
Correct Answer:
A
— 15 J
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Q. What is the x-intercept of the line 2x + 3y = 6? (2019)
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Solution
To find the x-intercept, set y = 0. Thus, 2x = 6, giving x = 3.
Correct Answer:
A
— 2
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Q. What is the x-intercept of the line given by the equation 4x + 5y - 20 = 0?
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Solution
To find the x-intercept, set y = 0. Thus, 4x = 20, giving x = 5.
Correct Answer:
A
— 4
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Q. What is the y-intercept of the line given by the equation 2x + 5y - 10 = 0? (2019)
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Solution
Rearranging to y = (-2/5)x + 2, the y-intercept is 2.
Correct Answer:
A
— 2
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Q. What is the y-intercept of the line given by the equation 5x - 2y = 10? (2023)
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Solution
Rearranging to slope-intercept form: -2y = -5x + 10, thus y = (5/2)x - 5. The y-intercept is -5.
Correct Answer:
D
— -2
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Q. What is the y-intercept of the line represented by the equation 4x - y + 8 = 0? (2019)
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Solution
Setting x = 0 in the equation gives -y + 8 = 0, thus y = 8.
Correct Answer:
A
— 8
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Q. What part of speech can function as a subject or object in a sentence? (2022)
A.
Noun
B.
Adverb
C.
Conjunction
D.
Interjection
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Solution
A noun can function as a subject or object in a sentence, representing a person, place, thing, or idea.
Correct Answer:
A
— Noun
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Q. What part of speech expresses an action or state of being?
A.
Noun
B.
Adjective
C.
Verb
D.
Adverb
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Solution
A verb expresses an action or a state of being.
Correct Answer:
C
— Verb
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Q. What part of speech is used to describe a quality or characteristic of a noun? (2022)
A.
Adverb
B.
Noun
C.
Adjective
D.
Pronoun
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Solution
An adjective describes a quality or characteristic of a noun.
Correct Answer:
C
— Adjective
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Q. What part of speech is used to describe a verb and often ends in -ly?
A.
Noun
B.
Adjective
C.
Adverb
D.
Pronoun
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Solution
An adverb is used to describe a verb and often ends in -ly.
Correct Answer:
C
— Adverb
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Q. What part of speech is used to describe a verb?
A.
Noun
B.
Adverb
C.
Conjunction
D.
Pronoun
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Solution
An adverb is used to describe or modify a verb.
Correct Answer:
B
— Adverb
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