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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. If the Rajya Sabha has 12 nominated members and the total number of members is 245, how many members are elected?

A. 233
B. 232
C. 230
D. 240

Solution

Total members = 245, Nominated members = 12. Therefore, Elected members = 245 - 12 = 233.

Correct Answer: A — 233

Q. If the Rajya Sabha has 12 nominated members and the total number of members is 245, what percentage of the Rajya Sabha is nominated?

A. 4.89%
B. 5.00%
C. 6.12%
D. 7.14%

Solution

Percentage of nominated members = (12/245) * 100 = 4.89%.

Correct Answer: B — 5.00%

Q. If the Rajya Sabha has 245 members and 12 are nominated, what fraction of the members are elected? (2019)

A. 1/20
B. 1/10
C. 1/5
D. 1/4

Solution

Elected members = 245 - 12 = 233. Fraction = 233/245 = 1/5 (approx)

Correct Answer: C — 1/5

Q. If the Rajya Sabha has 245 members and 50% are from the ruling party, how many members are from the ruling party? (2023)

A. 120
B. 122
C. 125
D. 130

Solution

50% of 245 = 0.5 * 245 = 122. Therefore, 122 members are from the ruling party.

Correct Answer: B — 122

Q. If the range of a data set is 20 and the minimum value is 10, what is the maximum value? (2023)

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

Solution

Range = Maximum - Minimum. Therefore, Maximum = Range + Minimum = 20 + 10 = 30.

Correct Answer: A — 30

Q. If the range of a data set is 20 and the minimum value is 5, what is the maximum value? (2023)

A. 15
B. 20
C. 25
D. 30

Solution

Range = Maximum - Minimum. Therefore, Maximum = Range + Minimum = 20 + 5 = 25.

Correct Answer: C — 25

Q. If the ratio of boys to girls in a class is 3:2 and there are 30 students in total, how many girls are there? (2019)

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

Solution

Let boys = 3x and girls = 2x. Then, 3x + 2x = 30 => 5x = 30 => x = 6. Girls = 2x = 12.

Correct Answer: A — 12

Q. If the ratio of the ages of A and B is 3:4 and the sum of their ages is 28 years, what is A's age? (2021)

A. 12
B. 14
C. 16
D. 18

Solution

Let A's age be 3x and B's age be 4x. Then, 3x + 4x = 28, giving 7x = 28, so x = 4. Thus, A's age = 3x = 12.

Correct Answer: B — 14

Q. If the ratio of the ages of A and B is 3:4 and the sum of their ages is 28, what is A's age? (2022)

A. 12
B. 14
C. 16
D. 18

Solution

Let A's age be 3x and B's age be 4x. Then, 3x + 4x = 28, so 7x = 28, giving x = 4. Thus, A's age = 3x = 12.

Correct Answer: A — 12

Q. If the ratio of the ages of A and B is 3:4 and the sum of their ages is 56 years, what is A's age?

A. 24
B. 21
C. 28
D. 30

Solution

Let A's age be 3x and B's age be 4x. Then, 3x + 4x = 56, giving 7x = 56, so x = 8. Thus, A's age = 3x = 24.

Correct Answer: A — 24

Q. If the ratio of the ages of A and B is 3:4 and the sum of their ages is 70, what is A's age? (2022)

A. 30
B. 35
C. 40
D. 45

Solution

Let A's age be 3x and B's age be 4x. Then, 3x + 4x = 70, giving 7x = 70, so x = 10. Thus, A's age = 3x = 30.

Correct Answer: B — 35

Q. If the ratio of the lengths of two sides of a triangle is 3:4 and the length of the shorter side is 9 cm, what is the length of the longer side? (2022)

A. 12 cm
B. 15 cm
C. 18 cm
D. 21 cm

Solution

If the shorter side is 9 cm and the ratio is 3:4, then the longer side is (4/3) × 9 cm = 12 cm.

Correct Answer: A — 12 cm

Q. If the ratio of the sides of a triangle is 3:4:5, what is the length of the longest side if the perimeter is 36 cm? (2021)

A. 15 cm
B. 12 cm
C. 9 cm
D. 18 cm

Solution

Let the sides be 3x, 4x, and 5x. Then, 3x + 4x + 5x = 36. Thus, 12x = 36, giving x = 3. The longest side is 5x = 15 cm.

Correct Answer: A — 15 cm

Q. If the ratio of the sides of a triangle is 3:4:5, what is the perimeter if the shortest side is 6 cm? (2021)

A. 30 cm
B. 36 cm
C. 42 cm
D. 48 cm

Solution

If the shortest side is 6 cm, the sides are 6, 8, and 10 cm. Perimeter = 6 + 8 + 10 = 24 cm.

Correct Answer: B — 36 cm

Q. If the ratio of the sides of a triangle is 3:4:5, what type of triangle is it? (2019)

A. Equilateral
B. Isosceles
C. Scalene
D. Right-angled

Solution

A triangle with sides in the ratio 3:4:5 is a right-angled triangle.

Correct Answer: D — Right-angled

Q. If the relative humidity is 100%, what does it indicate about the air?

A. Air is saturated
B. Air is dry
C. Air is cold
D. Air is warm

Solution

A relative humidity of 100% indicates that the air is saturated with moisture.

Correct Answer: A — Air is saturated

Q. If the relative humidity is 80% and the temperature is 25°C, what is the dew point temperature approximately? (2023)

A. 20°C
B. 22°C
C. 18°C
D. 15°C

Solution

Using a dew point calculator or approximation, the dew point at 80% relative humidity and 25°C is approximately 22°C.

Correct Answer: B — 22°C

Q. If the relative humidity is 80% and the temperature is 30°C, what is the dew point approximately?

A. 25°C
B. 20°C
C. 15°C
D. 10°C

Solution

Using the formula for dew point, the approximate dew point at 80% humidity and 30°C is around 20°C.

Correct Answer: B — 20°C

Q. If the relative humidity is 80% at a temperature of 25°C, what is the dew point temperature approximately?

A. 20°C
B. 22°C
C. 18°C
D. 15°C

Solution

At 25°C and 80% relative humidity, the dew point is approximately 22°C.

Correct Answer: B — 22°C

Q. If the relative humidity of the air is 60% at 25°C, what is the dew point temperature? (2020)

A. 15°C
B. 20°C
C. 10°C
D. 25°C

Solution

Using the formula for dew point approximation, Dew Point ≈ T - ((100 - RH) / 5) = 25 - ((100 - 60) / 5) = 25 - 8 = 20°C.

Correct Answer: B — 20°C

Q. If the resistance of a conductor is doubled, what happens to the current if the voltage remains constant? (2020)

A. Doubles
B. Halves
C. Remains the same
D. Increases four times

Solution

According to Ohm's Law, if the resistance is doubled while the voltage remains constant, the current will be halved.

Correct Answer: B — Halves

Q. If the resistance of a wire is 10 ohms and the voltage across it is 20 volts, what is the current flowing through the wire?

A. 2 A
B. 5 A
C. 10 A
D. 20 A

Solution

Using Ohm's Law (I = V/R), I = 20 V / 10 Ω = 2 A.

Correct Answer: A — 2 A

Q. If the resistance of a wire is doubled, what happens to the current if the voltage remains constant? (2021)

A. Doubles
B. Halves
C. Remains the same
D. Increases

Solution

According to Ohm's Law (I = V/R), if the resistance (R) is doubled while the voltage (V) remains constant, the current (I) will be halved.

Correct Answer: B — Halves

Q. If the roots of the equation ax^2 + bx + c = 0 are equal, what is the condition on a, b, and c? (2020)

A. b^2 - 4ac > 0
B. b^2 - 4ac = 0
C. b^2 - 4ac < 0
D. a + b + c = 0

Solution

The condition for equal roots is given by the discriminant: b^2 - 4ac = 0.

Correct Answer: B — b^2 - 4ac = 0

Q. If the roots of the equation x^2 + 2x + 1 = 0 are equal, what is the value of the discriminant?

A. 0
B. 1
C. 2
D. 4

Solution

The discriminant is given by b^2 - 4ac. Here, b = 2, a = 1, c = 1, so the discriminant is 2^2 - 4*1*1 = 0.

Correct Answer: A — 0

Q. If the roots of the equation x^2 + 2x + k = 0 are -1 and -3, what is the value of k? (2022)

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

Solution

The sum of the roots is -1 + -3 = -4, and the product is (-1)(-3) = 3. Thus, k = 3.

Correct Answer: C — 4

Q. If the roots of the equation x^2 + 3x + k = 0 are -1 and -2, what is the value of k? (2023)

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

Solution

Using Vieta's formulas, k = (-1)(-2) = 2.

Correct Answer: A — 2

Q. If the roots of the equation x^2 + 3x + k = 0 are real and distinct, what is the condition on k? (2022)

A. k < 0
B. k > 0
C. k < 9
D. k > 9

Solution

The discriminant must be positive: 3^2 - 4*1*k > 0 leads to 9 - 4k > 0, thus k < 9.

Correct Answer: C — k < 9

Q. If the roots of the equation x^2 + 4x + k = 0 are -2 and -2, what is the value of k? (2023)

A. 0
B. 4
C. 8
D. 16

Solution

Using the formula for the sum of roots, -2 + -2 = -4, and product of roots, (-2)(-2) = 4, we find k = 4.

Correct Answer: B — 4

Q. If the roots of the equation x^2 + 4x + k = 0 are equal, what is the value of k?

A. 4
B. 8
C. 16
D. 0

Solution

For the roots to be equal, the discriminant must be zero. Thus, 4^2 - 4*1*k = 0 leads to k = 4.

Correct Answer: B — 8

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