CAPF (AC) 2017 (Paper-1) (Question 101-125)

Total Questions: 15

1. Which of the following statements about the Equatorial region are correct?

1. It is a megathermal region

2. It is a sclerophyll region

3. It is a region of high development

4. It is a region of aerial streamlets

Select the correct answer using the code given below :

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

Correct Answer: (a) 1 and 4

Solution:The equatorial climate is found between 5° to 10° north and south of the equator.
In climatology, another term for the term tropical is mega thermal. Hence, the equatorial region is a mega thermal region. A tropical rainforest climate is typically hot, very humid, and wet.

The region is sparsely populated with less development. It is a region of aerial streamlets since most of the rains are intercepted by forest canopy which is thick and peculiar in the layer. Therefore, the correct option is (a).

2. Which one of the following statements about the Himalayas is NOT correct?

(a) They are young fold mountains
(b) They have geosynclinal rocks
(c) Himalayan frontal faults (HFF) separates Himalaya from Tibet
(d) Indus and Sutlej rivers form antecedent drainage in Himalaya

Correct Answer: (c) Himalayan frontal faults (HFF) separates Himalaya from Tibet

Solution:The Himalayas are young fold mountains. They are called so because they have formed only a few million years ago by a collision of the Eurasian plates as well as the Indo-Australian plates as a result of the Continental drift.

They have geosynclinals rocks. The Higher Himalaya is made up of 10-20 km-thick metamorphic rocks and granites situated at altitudes of 3000 m to over 8000 m. The rivers Indus, Brahmaputra, Sutlej, Kosi and Subansiri originated on the Tibetan side. Therefore, the correct option is (c).

3. Which one of the following is NOT a favourable condition for occurrence of a thunderstorm?

(a) Conditional and convective instability
(b) Adequate supply of moisture in the lower atmosphere
(c) Advection of cold dry air in the lower troposphere and warm moist air in the upper troposphere
(d) A synoptic situation of low level convergence and upper level divergence

Correct Answer: (c) Advection of cold dry air in the lower troposphere and warm moist air in the upper troposphere

Solution:Advection of cold dry air in the lower troposphere and warm moist air in the upper troposphere" as a non-favorable condition for thunderstorm occurrence. This means that the presence of cold dry air in the lower atmosphere and warm moist air in the upper atmosphere is not conducive to the development of thunderstorms.

Thunderstorms thrive on the interaction between warm moist air rising and cold dry air sinking, so if these conditions are not present, thunderstorms are less likely to form.

4. The ecological niche of an organism relates to

(a) specific habitat of the organism
(b) symbiotic relationship with other organisms
(c) diverse occurrence of a species under different conditions
(d) its inter reaction with all other organisms

Correct Answer: (a) specific habitat of the organism

Solution:The term "niche" describes the role an organism plays in a community. It is the specific habitat of the organism. It explains how an organism or population responds to the distribution of resources and competitors and how it in turn alters those same factors.

A very common example of an ecological niche is the dung beetle which consumes dung both in larval and adult form. It is of mainly two types, namely fundamental niches and realized niches. Therefore, the correct option is (a).

5. Free swimming macroscopic animals in an aquatic environment are referred to as

(a) Plankton
(b) Periphyton
(c) Benthos
(d) Nekton

Correct Answer: (d) Nekton

Solution:Free swimming macroscopic animals in an aquatic environment are referred to as Nekton. The term nekton means to swim derived from the Greek language. Ernst Haeckel introduced the term, nekton.

There are three types of nekton, namely chordates, molluscs and arthropods. The nonmotile marine organisms that are too small or weak to swim against the current and exist in a drifting state are called planktons. Therefore, the correct option is (d).

6. The term Biomagnifications is referred to as

(a) increase in the body weight
(b) uncontrolled growth of harmful organisms
(c) accumulation of increasing amount of non-degradable pollutant through food chain
(d) increase in the number of bacteria in a culture medium

Correct Answer: (c) accumulation of increasing amount of non-degradable pollutant through food chain

Solution:Biomagnification is also known as amplification or biological magnification. It is defined as the amount of concentration of a toxin, such as pesticides, in the tissues of tolerant organisms at successively higher levels in a food chain.

The various disease can be caused due to biomagnification are cancer, kidney problems, liver failure, birth defects, respiratory disorders, and heart diseases. It occurs when the concentration of a pollutant increases from one link in the food chain to another. Therefore, the correct option is (c).

7. Which one of the following statements about air pollution caused by diesel engines is correct?

(a) It produces large quantity of carbon monoxide at lower and high temperatures
(b) It produces large quantity of nitrogen oxides at lower and high temperatures
(c) It produces large quantity of carbon monoxide at lower temperature and nitrogen oxides at high temperature
(d) It produces large quantity of nitrogen oxides at lower temperature and carbon monoxide at high temperature

Correct Answer: (c) It produces large quantity of carbon monoxide at lower temperature and nitrogen oxides at high temperature

Solution:Air pollution caused by diesel engines produces a large quantity of carbon monoxide at lower temperatures. and nitrogen oxides at high temperatures. Diesel engines produce a large number of nitrogen oxides at lower and high temperatures.

Carbon monoxide makes up anywhere from 2% to 12% of diesel exhaust gases. Pollution from diesel exhaust includes Soot or particulate matter (PM); Oxides of nitrogen (NOx) which contributes to the production of ground-level ozone (smog) and acid rain; Hydrocarbons (HC); Therefore, the correct option is (c)

8. In an election which was contested by two candidates, X and Y, 4000 votes were polled. Suppose that every vote was polled in favour of either of the two candidates. Candidate Y got 40% of vote polled and was defeated. What was the margin of defeat?

(a) 500 votes
(b) 800 votes
(c) 1200 votes
(d) 1600 votes

Correct Answer: (b) 800 votes

Solution:Total votes (100%) = 4000

Y got 40% = 4000 × 40/100

If Y got 40% of vote, then X get 60% of votes.

Difference = 60-40 = 20%

∴ Margin of defeat = 4000 × 20/100 = 800 votes

9. The average of 7 consecutive odd numbers is M. If the next 3 odd numbers are also included, the average

(a) remains unchanged
(b) increases by 1.5
(c) increases by 2
(d) increases by 3

Correct Answer: (d) increases by 3

Solution:The average of n odd number = n

The average of 7 consecutive odd number = m

When the next 3 odd numbers are also included, then average = m + 3.

So, average increases by 3.

10. What is the percentage increase in investment in the Electrical sector from 2005-06 to 2009-10?

Investment in various industries/sectors across five years (in Rupee Hundred Crore)

Type of industry/sector	2005-06	2006-07	2007-08	2008-09	2009-10
Manufacturing	740	800	470	440	810
Electrical	500	520	600	650	800
Services	420	480	500	600	750
Mining	440	500	550	600	660
Others	800	900	980	1110	1080

(a) 30%
(b) 40%
(c) 50%
(d) 60%

Correct Answer: (d) 60%

Solution:Investment in the electrical sector from (2005-06) = 500

Investment in the electrical sector from (2009-10) = 800

Percentage increase = (800 - 500)/500 × 100

= 300/500 × 100 = 60%

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