CAPF (AC) 2018 (Paper-1) (Question 1-50)

Total Questions: 50

11. Match List-I with List-II and select the correct answer using the code given below the Lists :

List-I (Compound)	List-II (Type of polymer)
A. Melamine	1. Linear
B. Polyvinyl chloride	2. Condensation
C. Terylene	3. Natural
D. Cellulose	4. Cross-linked

Code:	A	B	C	D
(a)	3	2	1	4
(b)	4	1	2	3
(c)	3	1	2	4
(d)	4	2	1	3

Correct Answer: (b)

Solution:Terylene (Dacron): - It is a condensation polymer elimination of methanol (Small molecules) that takes place. It is a copolymer prepared from 2- molecules.

Linear Polymers: - These polymers consist of large and straight chains condensation polymers.

Condensation Polymers: - these are formed by repeated condensation between binary different bi-functional or tri-functional monomeric units. In these polymerization reactions, the elimination of small molecules such as water, alcohol, hydrogen, chloride etc. takes place.

Natural Polymers: - These polymers are naturally found in plants and animals. Hence, B is the right answer.

12. The Tropic of Cancer passes through which one of the following countries?

(a) North Sudan
(b) Chad
(c) Mali
(d) Yemen

Correct Answer: (c) Mali

Solution:Tropic of Cancer passes through following countries in west to east sequence: Mexico, Bahamas, Western Sahara, Mauritania, Algeria, Mali, Niger, Libya, Egypt, Saudi Arabia, UAE, Oman, India, China, Taiwan, Bangladesh, Myanmar.

13. Gersoppa Falls is formed by which one of the following rivers?

(a) Lohit
(b) Tungabhadra
(c) Sharavati
(d) Krishna

Correct Answer: (c) Sharavati

Solution:Lohit:- It rises in the Kangari Garpo range of Tibet. It is a tributary of Brahmaputra. It passes through Arunachal Pradesh then enters Assam where it is known as the Lohit River.

Tungabhadra:- It originates from western Ghats. It flows through the state of Karnataka and joins the Krishna river in the Kurnool district of Andhra Pradesh.

Sarvati:- It originates and flows entirely within the state of Karnataka. The famous Jog falls (Falls of Gersoppa) are formed by this river from a height of 253 meters.
Krishna: It originates near Mahabaleshwar. It flows in the states of Maharashtra, Karnataka, Telangana and Andhra Pradesh.

14. Which one of the following processes is not a part of long-wave radiation?

(a) Conduction
(b) Scattering
(c) Convection
(d) Radiation

Correct Answer: (b) Scattering

Solution:Longwave radiations are the electromagnetic radiation of wavelengths 30 to 100 µm emitted from earth and its atmosphere out spare in the form of thermal radiation. The process of longwave radiation involves conductors, convection and radiation.

Conductors:- It is the process of heat transfer from a warmer object to a cooler object when they come in contact with each other.

Convection:- Transfer of heat by the movement of mass or substance from one pace to another is called a conductor.

Radiation:- This is the process of emission of energy.

Scattering:- when light waves fall on the small bodies they are thrown out in all directions is called scattering of light. Thus, B is the Right answer.

15. In mid-latitude regions, the diurnal variation in weather is due to

(a) raising air/convection
(b) sinking air/conduction
(c) advection
(d) radiation

Correct Answer: (c) advection

Solution:Explanation:- The horizontal movement of the air is relatively more important than the vertical movement in the middle latitudes, most diurnal(day/night) caused by advection alone.

Advection:- The transfer of heat through the horizontal movement of air(wind) is called advection. In the tropical regions particularly in northern India during the summer season, local winds called 'Loo' is the outcome of the advection.

Radiation:- All objects emit radiant energy continuously.

Sinking Air/ Conduction:- It is the process of heat transfer from a warmer object to a cooler object.

Raising Air/ Convection:- It is the Transfer of heat by the movement of a mass or substance from one place to another.

16. Springs are common in which of the following areas?

1. Well jointed rocks

2. Arid areas with underlying rocks

3. Karst topography

4. Tilted strata

Select the correct answer using the code given below.

(a) 1 and 3 only
(b) 1, 3 and 4
(c) 2 and 4
(d) 3 and 4 only

Correct Answer: (b) 1, 3 and 4

Solution:

Springs are common in well-jointed rocks region with Karst Topography where surface water has nitrated the earth surface. The groundwater then travels through the networks of cracks and fissures.
Joint is geology, is a brittle fracture surface in rocks along with little or no displacement has occurred.
Karst is a type of landscape where the dissolving of the bedrock has created sinkholes, sinking streams brings the springs.
Tilted strata too have springs. In tilted areas water is in the lower part of the aquifer is stored under the pressure and give rise the spring,
Arid areas with underlying rocks do not have springs- Hence B is the right answer.

17. Consider the following diagram:

An equilateral triangle is inscribed in a circle or radius 1 unit. The area of the shaded region, in square unit, is

(a) π/3 - √3/4
(b) π/3 - 1/2
(c) π/3 - 3/4
(d) π/3 - 1

Correct Answer: (a) π/3 - √3/4

Solution:Radius of the circle = 1 unit

Radius of circumcircle of an equilateral triangle = a √3

(where a = side of equilateral A)

∴ a √3 = 1

⇒ a = √3

Area of circle = πr² = π × (1)² = π sq. unit

Area of equilateral triangle = √3/4 (a²)

= √3/4 (√3)² = (3√3)/4 sq. unit

∴ Area of shaded region

= 1/3 [Area of circle - Area of equilateral Δ]

= 1/3 [π - (3√3)/4] = (π/3 - √3/4) sq. unit.

18. In an examination, 53% students passed in Mathematics, 61% passed in Physics, 60% passed in Chemistry, 24% passed in Mathematics and Physics, 35% in Physics and Chemistry, 27% in Mathematics and Chemistry and 5% in none. The ratio of percentage of passes in Mathematics and Chemistry but not in Physics in relation to the percentage of passes in Physics and Chemistry but not in Mathematics is

(a) 7 : 5
(b) 5 : 7
(c) 4 : 5
(d) 5 : 4

Correct Answer: (b) 5 : 7

Solution:

∴ x is common in all the three,

and 5% did not pass in any subject.

∴ 95 = [53 + 60 + 61 - (27 + 24 + 35) + x]

⇒ 95 = [174 - 86 + x]

⇒ 95 = 88 + x

⇒ x = 7

Required percentage = (27 - x)/(35 - x) = (27 - 7)/(35 - 7)

= 20/28 = 5/7 = 5 : 7

19. Consider the following diagrams :

Which one of the following is the missing number in the diagrams given above?

(a) 1
(b) 2
(c) 3
(d) 4

Correct Answer: (c) 3

Solution:The pattern of the diagram is as :

14 + 36 + 25 + 25 = 100

20 + 50 + 10 + 20 = 100

30 + 30 + 40 + 0 = 100

Similarly,

36 + 54 + ? + 7 = 100 ⇒ ? = 100 - 97 ⇒ ? = 3

20. Which one of the following is the area of a sector of a circle of radius 10 cm formed by an arc length of 15 cm?

(a) 10p cm²
(b) 15p cm²
(c) 75cm²
(d) 150cm²

Correct Answer: (c) 75cm²

Solution:Length of arc = θ/180 × πr = θ/180 × π × 10

⇒ θ = 270/≠

Area of a sector of a circle = (θ/360) × πr

⇒ (270/(360π)) × π × 100 = 75

∴ Area of a sector of a circle is 75cm²

« Previous 123 4 5 Next »