CAPF (AC) 2022 (Paper-1) (Question 1-50)

Total Questions: 50

41. There is a group of 5 people among which there is one couple. In how many ways can these 5 people be seated in a row having 5 chairs if the couple is to be seated next to each other?

(a) 24
(b) 48
(c) 60
(d) 120

Correct Answer: (b) 48

Solution:Assume the couple as one then total arrangement = (3 + 1)! = 4!

Again, couple can sit in 2! ways .....

Hence, total arrangement = 4!2! = 48

42. Two friends 10 km apart start running towards each other at speeds of 10 km/hr and 14 km/hr respectively. After how much time will they meet each other?

(a) 20 minutes
(b) 25 minutes
(c) 28 minutes
(d) 30 minutes

Correct Answer: (b) 25 minutes

Solution:Relative speed when two are moving in opposite direction

= S₁ + S₂ = 10 + 14 = 24km / h × r

Hence, time required

= 10/24hr = 10/24 × 60 min uses = 25 min.

43. A coin is tossed 3 times. The probability of getting exactly 2 heads is

(a) 3/1
(b) 3/8
(c) 1/2
(d) 5/8

Correct Answer: (b) 3/8

Solution:

44. A test consists of 25 MCQs. Each correct answer gives +4 marks and incorrect answer gives -1 mark. If a candidate scores 74 marks, then how many questions were left Unattempted?

(a) 4
(b) 3
(c) 5
(d) 9

Correct Answer: (a) 4

Solution:To get 74 marks he must have answered more than 18 questions correctly.

Now, 74 = 4 × 19 - 1 × 2

Hence, correct questions = 19,

wrong questions = 2

Unattempted question = 25 - (19 + 2) = 4

45. A person has a total of 100 coins consisting of ₹ 2 and ₹ 5 coins. If the total value of the coins is ₹ 320, then the number of ₹ 2 coins is

(a) 40
(b) 50
(c) 60
(d) 70

Correct Answer: (c) 60

Solution:x + y = 100 ....... (i)

2x + 5y = 320 ....... (ii)

From 5 × (i) - (ii) ⇒ 5x - 2x = 500 - 320

∴ x = 180/3 = 60

Hence, number of 2 coins = 60.

46. The technology known as 'Electromagnetic Air Lift System' is sometimes talked about in reference to

(a) launching guided missiles from silos
(b) launching aircraft from warships
(c) navigation of nuclear-powered submarines
(d) development of reusable rockets

Correct Answer: (b) launching aircraft from warships

Solution:The Electromagnetic Aircraft launch system launches aircraft by means of a catapult line system employing a linear induction.

47. Consider the following statements :

1. Aluminium powder is used as a solid fuel for rocket engines.

2. Compared to liquid fuel propelled rocket engines, the thrust per amount of fuel burned is higher in solid fuel propelled rocket engines.

Which of the statements given above is/are correct?

(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2

Correct Answer: (a) 1 only

Solution:The first rocket fuel was solid rocket which was used in the earliest pyrotechnics created by Chinese. The fuel for SLS booster is Aluminum Powder as it reacts quickly. The aluminum is so reactive that it only occurs naturally in the mineral combustion state and not in its pure state. It is important as it can be mixed easily with other metals.

48. Consider the following missiles :

1. Agni-I

2. BrahMos

3. Dhanush

Which of the above is/are cruise missile/missiles?

(a) 1 and 2
(b) 2 only
(c) 1 and 3
(d) 3 only

Correct Answer: (b) 2 only

Solution:BrahMos is a cruise missile. The BrahMos is a ramjet supersonic cruise missile of a short-range developed by the Defence Research and Development Organisation (DRDO) and the Russian Federation's NPO Mashinostroyeniya (NPOM). It is named after two major rivers of India and Russia: Brahmaputra and Moskva

Agni-I is a Short Range Ballistic Missile. It is first missile of the Agni series launched in 1983. Developed by DRDO + DRDL (Defence Research Development Laboratory) + BDL (Bharat Dynamics Limited, Hyderabad).
Dhanush is a Short Range Ballistic Missile. Dhanush is also a surface-to-surface short range nuclear capable ballistic missile with a strike range of 350 kms developed by the Defence Research and Development Organisation (DRDO).

49. With reference to India's defence, consider the following helicopters:

1. Cheetah

2. Chetak

3. Rudra

Which of the above has/have turret gun, rocket system and air-to-air missile?

(a) 1 and 2
(b) 2 only
(c) 1 and 3
(d) 3 only

Correct Answer: (d) 3 only