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Defence Exams

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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.

NDA

Q. A ball is dropped from a height of 80 m. How long will it take to reach the ground? (Take g = 10 m/s²) (2021)

A. 4 s
B. 5 s
C. 6 s
D. 8 s

Solution

Using the formula h = (1/2)gt², we have 80 = (1/2)(10)t². Solving gives t² = 16, so t = 4 s.

Correct Answer: B — 5 s

Q. A ball is thrown upwards with a speed of 15 m/s. How long will it take to reach the highest point? (Take g = 10 m/s²) (2023)

A. 1.5 s
B. 2 s
C. 3 s
D. 4 s

Solution

Time to reach highest point = u/g = 15/10 = 1.5 s.

Correct Answer: B — 2 s

Q. A basketball player has a free throw success rate of 75%. If he takes 20 free throws, how many successful throws can be expected? (2019)

A. 15
B. 20
C. 10
D. 5

Solution

Expected successful throws = 75% of 20 = 0.75 * 20 = 15.

Correct Answer: A — 15

Q. A basketball player has a free throw success rate of 75%. If he takes 20 free throws, how many successful throws can he expect? (2019)

A. 10
B. 15
C. 12
D. 18

Solution

Expected successful throws = 75% of 20 = 0.75 * 20 = 15.

Correct Answer: B — 15

Q. A basketball player has a shooting accuracy of 75%. If he takes 20 shots, how many shots can he be expected to make? (2019)

A. 15
B. 20
C. 10
D. 5

Solution

Expected successful shots = 75% of 20 = 0.75 * 20 = 15.

Correct Answer: A — 15

Q. A basketball player has a shooting accuracy of 75%. If he takes 40 shots in a game, how many shots can he be expected to make? (2019)

A. 25
B. 30
C. 35
D. 20

Solution

Expected successful shots = 75% of 40 = 0.75 * 40 = 30 shots.

Correct Answer: B — 30

Q. A beam of light passes from air into a medium with a refractive index of 1.5. If the angle of incidence is 30 degrees, what is the angle of refraction? (2022)

A. 19.1 degrees
B. 20 degrees
C. 25 degrees
D. 30 degrees

Solution

Using Snell's law, n1 * sin(i) = n2 * sin(r). Thus, sin(r) = (1 * sin(30)) / 1.5 = 0.333, giving r ≈ 19.1 degrees.

Correct Answer: A — 19.1 degrees

Q. A beam of light passes through a prism with an angle of 60 degrees. If the refractive index of the prism is 1.5, what is the angle of deviation? (2023)

A. 30 degrees
B. 60 degrees
C. 45 degrees
D. 15 degrees

Solution

Using the formula for angle of deviation: D = A(n-1), we find D = 60(1.5-1) = 30 degrees.

Correct Answer: A — 30 degrees

Q. A bill is passed in the Lok Sabha with a majority of 300 votes. If the total number of votes cast is 500, what percentage of votes did the bill receive? (2019)

A. 50%
B. 60%
C. 70%
D. 80%

Solution

Percentage of votes = (300/500) * 100 = 60%.

Correct Answer: C — 70%

Q. A bill is passed in the Lok Sabha with a majority of 300 votes. If the total votes cast were 500, what is the percentage of votes in favor of the bill?

A. 50%
B. 60%
C. 70%
D. 80%

Solution

Percentage of votes in favor = (300/500) * 100 = 60%.

Correct Answer: C — 70%

Q. A bill is passed in the Lok Sabha with a majority of 55%. If there are 545 members, how many members voted in favor of the bill?

A. 300
B. 275
C. 250
D. 200

Solution

Members voting in favor = 55% of 545 = 0.55 * 545 = 299.75, rounded to 300.

Correct Answer: B — 275

Q. A bill is passed in the Lok Sabha with a majority of 60%. If 400 members voted, how many members voted against the bill?

A. 160
B. 140
C. 100
D. 120

Solution

Members voting for the bill = 60% of 400 = 240. Members voting against = 400 - 240 = 160.

Correct Answer: A — 160

Q. A bill is passed in the Lok Sabha with a majority of 60%. If there are 545 members in the Lok Sabha, how many members voted in favor of the bill?

A. 327
B. 330
C. 300
D. 350

Solution

Members voting in favor = 60% of 545 = 0.6 * 545 = 327.

Correct Answer: A — 327

Q. A bill is passed in the Lok Sabha with a majority of 60%. If there are 545 members, how many members voted in favor of the bill?

A. 327
B. 330
C. 300
D. 350

Solution

60% of 545 = 0.6 * 545 = 327 members voted in favor.

Correct Answer: A — 327

Q. A bill requires a simple majority to pass in the Lok Sabha. If there are 545 members, how many votes are needed for a simple majority? (2021)

A. 272
B. 273
C. 274
D. 275

Solution

A simple majority is more than half, so (545/2) + 1 = 273 votes are needed.

Correct Answer: B — 273

Q. A block of mass 2 kg is placed on a frictionless surface and is pushed with a force of 10 N. What is the acceleration of the block?

A. 2 m/s²
B. 5 m/s²
C. 10 m/s²
D. 20 m/s²

Solution

Using Newton's second law, F = ma, we have a = F/m = 10 N / 2 kg = 5 m/s².

Correct Answer: B — 5 m/s²

Q. A block of mass 5 kg is placed on a frictionless surface and is pushed with a force of 20 N. What is the acceleration of the block?

A. 2 m/s²
B. 4 m/s²
C. 5 m/s²
D. 10 m/s²

Solution

Using Newton's second law, F = ma, we have a = F/m = 20 N / 5 kg = 4 m/s².

Correct Answer: B — 4 m/s²

Q. A boat can travel at a speed of 10 km/h in still water. If it goes downstream, its speed increases by 2 km/h. What is its speed downstream? (2021)

A. 10 km/h
B. 12 km/h
C. 14 km/h
D. 16 km/h

Solution

Speed downstream = Speed in still water + Speed increase = 10 km/h + 2 km/h = 12 km/h.

Correct Answer: B — 12 km/h

Q. A boat goes downstream at a speed of 20 km/h and upstream at 10 km/h. What is the speed of the boat in still water? (2022)

A. 15 km/h
B. 20 km/h
C. 25 km/h
D. 30 km/h

Solution

Speed in still water = (Downstream speed + Upstream speed) / 2 = (20 + 10) / 2 = 15 km/h.

Correct Answer: A — 15 km/h

Q. A body is thrown vertically upwards with a speed of 20 m/s. What is the maximum height it reaches? (g = 10 m/s²)

A. 20 m
B. 40 m
C. 30 m
D. 10 m

Solution

Using the formula h = (u^2)/(2g), where u = 20 m/s and g = 10 m/s², we get h = (20^2)/(2*10) = 20 m.

Correct Answer: B — 40 m

Q. A body is thrown vertically upwards with a speed of 20 m/s. What is the maximum height reached by the body? (Take g = 10 m/s²)

A. 20 m
B. 40 m
C. 30 m
D. 50 m

Solution

Using the formula h = (u²)/(2g), where u = 20 m/s and g = 10 m/s², we get h = (20²)/(2*10) = 400/20 = 20 m.

Correct Answer: B — 40 m

Q. A bottle contains 1 liter of a solution that is 30% salt. How much salt is in the solution? (2022)

A. 100 g
B. 200 g
C. 300 g
D. 400 g

Solution

Amount of salt = 30% of 1 liter = 0.3 liters = 300 g (since 1 liter of water is approximately 1000 g).

Correct Answer: C — 300 g

Q. A box contains 10 balls numbered from 1 to 10. What is the probability of drawing a ball with an even number?

A. 1/2
B. 1/5
C. 1/10
D. 3/10

Solution

Even numbers in the box are 2, 4, 6, 8, 10 (5 even numbers). Total balls = 10. Probability = 5/10 = 1/2.

Correct Answer: A — 1/2

Q. A box contains 10 balls, 4 of which are red. If one ball is drawn at random, what is the probability that it is red? (2020)

A. 2/5
B. 1/2
C. 4/10
D. 3/10

Solution

Probability of drawing a red ball = Number of red balls / Total balls = 4/10 = 2/5.

Correct Answer: B — 1/2

Q. A box contains 10 balls, 4 of which are white. If one ball is drawn at random, what is the probability that it is not white? (2022)

A. 2/5
B. 3/5
C. 1/2
D. 1/4

Solution

Number of non-white balls = 10 - 4 = 6. Probability = 6/10 = 3/5.

Correct Answer: B — 3/5

Q. A box contains 10 balls, of which 4 are red and 6 are blue. If one ball is drawn, what is the probability that it is not red?

A. 2/5
B. 3/5
C. 4/5
D. 1/5

Solution

Probability of not red = Number of non-red balls / Total balls = 6/10 = 3/5.

Correct Answer: B — 3/5

Q. A box contains 10 balls, of which 4 are white and 6 are black. If one ball is drawn, what is the probability that it is black?

A. 3/5
B. 2/5
C. 1/2
D. 1/10

Solution

Probability = Number of black balls / Total balls = 6/10 = 3/5.

Correct Answer: A — 3/5

Q. A box contains 10 balls, of which 4 are white and 6 are black. If one ball is drawn at random, what is the probability that it is white?

A. 2/5
B. 3/5
C. 4/10
D. 1/2

Solution

Probability of white = Number of white balls / Total balls = 4/10 = 2/5.

Correct Answer: C — 4/10

Q. A box contains 10 balls, of which 4 are white and 6 are black. If one ball is drawn at random, what is the probability that it is black?

A. 3/5
B. 2/5
C. 1/2
D. 6/10

Solution

Probability of drawing a black ball = Number of black balls / Total balls = 6/10 = 3/5.

Correct Answer: A — 3/5

Q. A box contains 10 light bulbs, of which 3 are defective. If one bulb is selected at random, what is the probability that it is not defective?

A. 3/10
B. 7/10
C. 1/2
D. 1/3

Solution

Total bulbs = 10, Non-defective bulbs = 10 - 3 = 7. Probability = Non-defective bulbs / Total bulbs = 7/10.

Correct Answer: B — 7/10

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