CAPF (AC) 2016 (Paper-1) (Question 1-50)

Total Questions: 50

11. How is the rate of transpiration affected by decreasing humidity and by decreasing light intensity?

List-I Decreasing humidity	List-II Decreasing light intensity
(a) Decreases	Decreases
(b) Increases	Decreases
(c) Increases	Increases
(d) Decreases	Increases

Correct Answer: (b)

Solution:The process in which water moves through a plant and its evaporation from aerial parts is called transpiration. The most essential element for the growth of plants is water, however, there is a very small intake of water by the roots takes place. Water always moves down a concentration gradient.

Therefore, when there is a high amount of water vapour, the water potential gradient between the inside of the leaf stomata and the atmosphere is shallow and the rate of transpiration will be below. Therefore, option (d) is correct.

12. Vaccination involves :

(a) injecting the body with materials that stimulate the body to produce antibodies
(b) injecting the body with materials that stimulate the body to produce antigens
(c) the use of monoclonal antibodies to cure a disease
(d) use of antibiotics to cure diseases

Correct Answer: (a) injecting the body with materials that stimulate the body to produce antibodies

Solution:The process of vaccination involves the act of introducing a vaccine into the body to produce antibodies, which means immunity to a specific disease. This process makes a person immune to a disease. Another term that can be used in place of vaccination is inoculation.

There are various ingredients in a vaccination such as antigens, stabilizers, adjuvants, antibiotics, and preservatives. During the process of production of a vaccination, various residual by-products are produced. Therefore, option (a) is correct.

13. Which of the following are examples of carnivorous plants?

(a) Sundew Venus fly trap, Pitcher plant
(b) Cuscuta, Rafflesia, Mistletoe
(c) Sandalwood tree, Broom rape, Pitcher plant
(d) Cuscuta, Bladderwort, Mistletoe

Correct Answer: (a) Sundew Venus fly trap, Pitcher plant

Solution:Plants that derive some or most of their nutrients from trapping and consuming animals or protozoans, typically insects and other arthropods are known as carnivorous plants. They generate energy from the process of photosynthesis.

They have adapted to grow in places where the soil is thin or poor in nutrients, especially nitrogen, such as acidic bogs. Some of the common carnivore's plants are sundew Venus flytrap plant pitcher plant. Therefore, option (a) is correct.

14. Consider the following:

Which one of the following figures will come in the blank space?

Correct Answer: (b)

15. Consider the following diagram (not in scale) :

There are seven places marked as P, Q, R, S, T, U and V as shown in the diagram. The directly connected paths between two places are indicated by line segments joining the two places along with the length labelled in km. Then, the shortest distance between P and U is:

(a) 14 km
(b) 15 km
(c) 12 km
(d) 13 km

Correct Answer: (c) 12 km

Solution:Dijkstra Algorithm (Shortest Path Algorithm) - For a given source node in the graph, the algorithm finds the shortest path between that node and every other. It can also be used for finding the shortest paths from a single node to a single destination node by stopping the algorithm once the shortest path to the destination node has been determined.

For these type of question to get shortest distance need to start with starting point and choose the nearest point with minimum distance. Again from that particular point choose the point with minimum distance and this process will go one till the destination point.

So here the path with minimum distance is as follows:

P → Q → R → S → T → V → U

Shortest distance from P to U = 4 + 2 + 1 + 3 + 1 + 1 = 12 Km

Hence, "12 Km" is the correct answer.

16. The number of persons reading newspaper is shown in the following Venn Diagram (Survey of 50 persons) :

In a population of 10000, what is the number of persons expected to read at least two newspapers?

(a) 5000
(b) 6000
(c) 6250
(d) 5400

Correct Answer: (d) 5400

Solution:Number of persons read at least two newspapers

= 12 + 8 + 5 + 2 = 27

50 → 10000 (given)

∴ 1 → 200 (given)

∴ 27 → 200 × 27 = 5400 therefore 1 -> 200

17. A vehicle with mileage 15 km per litre contains 2 L of fuel. The vehicle gets some defect as a result of which 5 L of fuel gets wasted per hour when the engine is on. With what minimum speed the vehicle has to move to travel 20 km with the existing amount of fuel, if it travels with a uniform speed?

(a) 100 km per hour
(b) 120 km per hour
(c) 150 km per hour
(d) 200 km per hour

Correct Answer: (c) 150 km per hour

Solution:Let speed of vehicle be s km/h.

Fuel consumption in travelling 20km = Distance / Milage = 20/15

Fuel wastage = Fuel wastage per hour × Time taken in travelling

= (5 × 20/s) = 100/s

Total fuel used = Fuel consumption in travelling 20 km + Fuel wastage

2 = 20/15 + 100/s

2 - 20/15 = 100/s

10/15 = 100/s

∴ s = 150km / h × r

18. Consider the following statements relating to Sea Salinity:

1. The ocean salinity depends on evaporation and precipitation

2. Any change in the temperature or density influences the salinity

3. Major source of sea salinity is terrestrial discharge by rivers

Which of the statements given above are correct?

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

Correct Answer: (a) 1 and 2 only

Solution:The amount of salt present in seawater is known as sea salinity. There are various elements such as temperature, evaporation and precipitation the salinity. If the rate of evaporation is high, more liquid water turns into water vapour.

When temperature increases, liquid water turns into water vapour and the density of the medium decreases. It directly affects the salinity. The major source of salts dissolved in seawater is rocked on terrestrial land. The rainwater is acidic which erodes rocks. Therefore, the correct option is (a).

19. Consider the following statements relating to salt production in India :

1. India is the second largest producer of iodised salt in the world next only to China.

2. Salt mining is carried out in Himachal Pradesh

3. Gujarat is the leading producer of salt in India

4. Ground water is the important source of salt in Rajasthan

Which of the statements given above are correct?

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

Correct Answer: (c) 1, 2 and 3

Solution:India is the second-largest producer of iodized salt in the world next only to China. Salt mining is carried out in Himachal Pradesh. Gujarat is the leading producer of salt in India.
According to the statistics of the last year, the states of Gujarat, Andhra Pradesh and Rajasthan account for the 80%,12% and 7%, respectively of the Sambhar Lake. The main sources of salt in India are sea brine, lake brine, sub-soil brine and rock salt deposits.
Therefore, the correct option is (c).

20. Which of the following statements relating to Dharwar geological system are correct?

1. They belong to Archaean geological period

2. They are metamorphosed sedimentary rocks

3. They are of great economic importance for its mineral resources

4. They are found predominantly in Karnataka, Tamil Nadu, Odisha and Jharkhand

Select the correct answer using the code given below :

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

Correct Answer: (a) 1, 2, 3 and 4

Solution:The Dharwar geological system belongs to the Archaean geological period, which is one of the oldest periods in Earth's history. The Dharwar geological system consists of metamorphosed sedimentary rocks, which have been transformed by heat and pressure.

The Dharwar geological system is of great economic importance due to its mineral resources, including gold, iron ore, and manganese. The Dharwar geological system is predominantly found in the states of Karnataka, Tamil Nadu, Odisha and Jharkhand

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