CAPF (AC) 2015 (Paper-1) (Question 101-125)

Total Questions: 25

11. Movement of outer electrons in the inner orbits of an atom produces :

Correct Answer: (d) x-ray
Solution:X-rays are a type of radiation called electromagnetic waves. They are produced due to the movement of outer electrons in the inner orbits of an atom. Usually, they a wavelength ranges from 10 picometers - 10 nanometers.

They are used to take pictures of the inside of your body. The images show the parts of your body in different shades of black and white since different tissues absorb different amounts of radiation. Therefore, the correct option is (d).

12. y-ray consists of :

Correct Answer: (d) electromagnetic waves
Solution:V gamma rays are the very high-frequency form of electromagnetic radiation that consists of photons emitted by radioactive elements. It consists of the shortest wavelength electromagnetic waves and so imparts the highest photon energy.

In 1903, Ernest Rutherford named the seradiation gamma rays based on their relatively strong penetration of matter; in 1900 he had already named two less penetrating types of decay radiation (discovered by Henri Becquerel) alpha rays and beta rays in ascending order of penetrating power. Therefore, option (d) is correct.

13. The heaviest element known up till January 2015 has the atomic number :

Correct Answer: (b) 118

14. Consider the following statements relating to cyclone, anti cyclone and trade wind:

1. The wind direction is clockwise in the cyclone of northern hemisphere

2. The planetary wind that blows from north-east to north-west is known as north-east trade wind

3. The wind direction is anti clockwise in the anticyclone of southern hemisphere

4. Both westerlies and trade winds originate from sub-tropical highs

Which of the statements given above is/are correct?

Correct Answer: (a) 3 and 4 only
Solution:The wind direction is anti-clockwise in Northern Hemisphere due to and clockwise in Southern Hemisphere. The Coriolis Effect is responsible for these movements. The force that explains the paths of objects on rotating bodies.

An anticyclone is a weather phenomenon defined as a large-scale circulation of winds around a central region of high atmospheric pressure, clockwise in the Northern Hemisphere and counter clockwise in the Southern Hemisphere as viewed from above. Both westerlies ad trade winds originate from sub-tropical highs. Therefore, option (a) is correct.

15. 'Evaporites' is :

Correct Answer: (a) a rock
Solution:"Evaporates" is a water-soluble sedimentary mineral deposit. They are for meddue to concentration and crystallization by evaporation from an aqueous solution. There are two types of evaporite deposits: marine, which can also be described as ocean deposits, and non-marine, which are found in standing bodies of water such as lakes.

Evaporites are considered sedimentary rocks and are formed by chemical sediments. Some of the common examples of an evaporate are gypsum, anhydrite, rock salt, and various nitrates and borates. Therefore, option (a) is correct.

16. The following item consists of two statements, Statement I and Statement II. Examine these two statements carefully and select the correct answer using the code given below:

Statement-I: The Indian Ocean Tsunami of 2004 occurred along a subduction zone along west coast of Sumatra

Statement-II: Along the Sumatra coast the Indo-Australian Plate converges below the Eurasian Plate

Correct Answer: (b) Both the statements are individually true but Statement II is NOT the correct explanation of Statement I
Solution:The Indian Ocean Tsunami of 2004 occurred along a subduction zone along the west coast of Sumatra. It took place on December 26, 2004. It took place below the south western part of Sumatra and the Andaman Islands.

Along the Sumatra coast, the Indi-Australian Plate converges below the Eurasian plate. Both the statements are correct but Statement II is not the correct explanation of Statement I. Therefore, the correct option is (b).

17. Consider the following pattern:

The embedded figure in the given pattern is:

Correct Answer: (a)

18. Which one of the following series of letters follows a pattern and is different from the rest?

Correct Answer: (a) ADHMSZ
Solution:

So, option (a) follows a pattern and is different from the rest.

19. The age of 'E' is twice the age of 'S'. To find out the difference in their ages, which of the following information is/are sufficient?

I. After five years, the ratio of their ages would be 9:5

II. Before ten years, the ratio of their ages was 3:1

Correct Answer: (c) Either I or II
Solution:Let the age of S is x years.

∴ Age of E will be 2x years.

From (I),

(2x + 5)/(x + 5) = 9/5

; 10x + 25 = 9x + 45 ; x = 20 years.

∴ Age of  'S' = 20 years and age of  'E' = 20 × 2 = 40 years.

From (II),

(2x - 10)/(x - 10) = 3/1

2x - 10 = 3x - 30

x = 20 years

∴ Age of  'S' = 20 years and age of 'E' = 20 × 2

= 40 years.

To find out the difference in their ages either I or II is sufficient.

20. Two racing cars of masses m₁ and m₂ are moving in circles of radii r₁ and r₂ respectively. Their speeds are such that each car makes a complete circle in the same time 't', The ratio of angular speed of the first to that of the second car is:

Correct Answer: (b) 1:1
Solution:According to the question,

Both the cars complete on the circle in the same time t

We know that,

Angular speed omega ω = t₂π

Now, Angular speed of first car omega ω₁ = t₂π

The angular speed of second car omega ω₂ = t₂π

Therefore, the ratio of angular speed of the first car to that of second

ω₂ ω₁ = t₂πt₂π ; ω₂ ω₁ = 11

Hence, the ratio of angular speed of the first car to that of the second is 1:1.

Therefore, the correct option is (b).