Kolkata Police Constable Prelims Mock Test - 9 - Kolkata Police Constable MCQ

The word Noise comes from the Latin word “nausea”. Noise pollution is referred to as an undesirable sound that causes uneasiness to the ear and can result in serious health hazards. Noise pollution can be classified into indoor and outdoor sources.

• Indoor Sources: They include noise produced from radio, television, generators, lawn mowers, electric fans, air coolers, air conditioners, different home, and kitchen appliances, etc.
• Outdoor Sources: They include noise from loudspeakers, industrial activities, automobiles, rail traffic, aeroplanes, farm machines, pump sets, etc.

Key Points

• ​Noise pollution around the educational area can negatively affect the performance of both teachers and students. Noise pollution in the school's environment occurs due to many sources.
• It depends on where the school is built. A school which is located near the city center has a very high noise pollution range because it has many sources that will lead to noise pollution.
• In large residential areas, the sources of noise pollution are limited but in some cases, it still leads to noise problems. The schools must be located in a quiet environment.
• Noise in classrooms can lead to stress and teacher has to raise their voice louder. Hence, teachers teach children to remain quiet in the class and maintain proper silence while learning so that the teacher can teach effectively.

Hence, it is concluded that by maintaining silence in and around the school helps to prevent noise pollution in or around the school.

• In Pakistan, agriculture occupies about 60 percent of the labor force and its products account for 25 percent of the GDP. 
• Cotton is the main product of the country. Other crops are wheat, rice, or sugarcane, and some farmers are beginning to look to more profitable crops, like fruit or vegetables. 
• The country has limited reserves of oil and natural gas. 
• Pakistan’s major chemical industry is built on deposits of gypsum, rock salt, and soda ash. 
• Fishing is also important on the coast but is not as well organized.
• This country have a bulk salt range.

Explanation:

• Rock Edicts of Ashoka: These are a series of inscriptions on large rocks or pillars by the Mauryan Emperor Ashoka during his reign in the 3rd century BC.


• Southern Kingdoms mentioned: Cholas, Pandyas, Satiyaputra, Keralaputra, and Ceylon are mentioned in the Rock Edicts of Ashoka.


• Identifying the correct Rock Edicts: To determine which two Rock Edicts mention these Southern kingdoms, we need to refer to historical records and inscriptions.


• Second and Thirteenth Rock Edicts: These two Rock Edicts of Ashoka mention the Southern kingdoms Cholas, Pandyas, Satiyaputra, Keralaputra, and Ceylon.


• Conclusion: Therefore, the correct answer is B: Second and Thirteenth Rock Edicts of Ashoka mention the Southern kingdoms Cholas, Pandyas, Satiyaputra, Keralaputra, and Ceylon.

The correct answer is Agricultural products.

• Panipat district is a part of the Karnal Lok Sabha Constituency.
• There are four Vidhan Sabha constituencies in the Panipat district i.e Panipat Rural, Panipat City, Israna, Samalkha.
• Panipat district is situated on Shershah Suri Marg (now known as G.T. road or NH-1), 90 KM north of Delhi.
• On three sides, Panipat district boundaries touch other districts of Haryana, Karnal in the north, Jind in the west, and Sonipat in the south.
• Panipat was a part of the Karnal district until 31 October 1989.
• It was separated from Karnal, along with another subdivision, the Assandh tehsil. When the district was re-formed on 1 January 1992, the Assandh tehsil was excluded.
• In 2011, Panipat had a population of 1,202,811 of which males and females were 646,324 and 556,487 respectively.
• The urban population percentage in Panipat district was 45.97% and the rural population in the district was 54.03% according to the 2011 census.
• The sex ratio in urban and rural areas of district Panipat was 864 and 858 respectively.
• Panipat District population constituted 4.74 percent of the total Haryana population.
• Panipat district has an area of around 1268 square kilometres.
• The literacy rate of the Panipat district is 75.94%.
• Panipat is a city of textiles and carpets. It is the biggest centre for quality blankets and carpets in India and has a handloom weaving industry.
• The Samalkha subdivision of this district is famous for the Foundry of Agriculture instruments.
•  Panipat city is the biggest center of “Shoddy Yarn” in the World.
• There are five tehsils in district Panipat i.e Bapoli, Israna, Madlauda, Panipat, and Samalkha.
• There are two municipalities in the district Panipat that are Municipal Committee Samalkha, Municipal Corporation Panipat.

About Haryana

• Capital - Chandigarh
• Chief Minister - Manohar Lal Khattar
• Governor - Bandaru Dattacharya

The correct option is D.
A population pyramid is a graph that shows the distribution of ages across a population divided down the center between male and female members of the population.

The National Human Right Commission is an independent commission, set up by the law in the year 1993:
Explanation:
The National Human Rights Commission (NHRC) is an autonomous and independent body established in India to protect and promote human rights. It was set up under the Protection of Human Rights Act in the year 1993.
Key Points:
- The NHRC is mandated to inquire into complaints of human rights violations, intervene in cases pending before the courts, and promote human rights awareness.
- The commission is responsible for the protection and promotion of human rights, including civil, political, economic, social, and cultural rights.
- It has the power to visit jails, detention centers, and any other place where a person is detained under law.
- The NHRC has the authority to recommend payment of compensation to the victims of human rights violations.
- It is composed of a chairperson and several members, who are appointed by the President of India.
- The NHRC plays a crucial role in ensuring the accountability of the state and its agencies in upholding human rights.
Conclusion:
The National Human Rights Commission was established in 1993 under the Protection of Human Rights Act to protect and promote human rights in India.

A cottage industry is a small-scale, decentralized manufacturing business often operated out of a home rather than a purpose-built facility. Cottage industries are defined by the amount of investment required to start, as well as the number of people employed.

The electrostatic precipitator is one of the most widely used collection devices for particulates. An electrostatic precipitator (ESP) is a particulate collection device that removes particles from a flowing gaseous stream (such as air) using the force of an induced electrostatic charge.

ESP can be operated at high temperatures and pressures, and its power requirement is low. An electrostatic precipitator is a type of filter (dry scrubber) that uses static electricity to remove soot and ash from exhaust fumes before they exit the smokestacks. 

∴ An electrostatic precipitator is a device to control particulate emissions only.

Peru has declared a health emergency in response to the surge in dengue fever cases, with over 31,000 reported cases and 32 fatalities in 2024. This declaration encompasses 20 out of Peru's 25 regions, highlighting the severity of the situation in the country.

The correct answer is C as The Indian Association sponsored an All-india National Conference at Calcutta which was attended by several leaders from outside Bengal. It was held in 1883

Dryland farming is characterized by dependence on rainwater, and the primary challenge is the unpredictable and erratic nature of rainfall. This results in fluctuations in crop production and the need for moisture conservation measures.

The liquidity preference theory, proposed by John Maynard Keynes, suggests that interest rates are determined by the demand for and supply of money. When the demand for money exceeds its supply, interest rates tend to rise, and vice versa.

Features accepted by all the Indian leaders much before they sat down to make the Constitution:
- Universal adult franchise:
- All the Indian leaders unanimously accepted the idea of universal adult franchise, which means every adult citizen of the country, irrespective of their caste, religion, gender, or social status, has the right to vote in elections.
- This feature was seen as an essential aspect of democracy and was aimed at ensuring equal political rights for all citizens.
- Right to freedom:
- The concept of fundamental rights, including the right to freedom, was widely accepted by Indian leaders even before the Constitution was drafted.
- The right to freedom encompasses various freedoms such as freedom of speech and expression, freedom of assembly, freedom of religion, and freedom of movement, among others.
- Indian leaders believed in the importance of safeguarding these fundamental rights to protect individual liberties and promote a democratic society.
- Protection of the rights of minorities:
- Indian leaders recognized the significance of protecting the rights of minorities in a diverse country like India, where people from different religions, languages, and cultures coexist.
- They understood the need to ensure equal rights and opportunities for all individuals, irrespective of their minority status.
- This commitment to protect the rights of minorities was reflected in the Constitution through provisions such as the right to cultural and educational rights for minorities.
Conclusion:
All the Indian leaders unanimously accepted the features of universal adult franchise, right to freedom, and protection of the rights of minorities much before they sat down to make the Constitution. These features were seen as essential principles to establish a democratic and inclusive society in India.

Given :  

1. Five years ago a was three times as old as b  

2. Ten years later a shall be twice older than b.

Assume that present age of a as x and that of b as y.

Five years ago, a was thrice as old as b  

i.e. age of a was x - 5 and age of b was 3(y-5)

x - 5 = 3 (y - 5)

x - 5 = 3y - 15

x - 3y = -15+5

x - 3y = -10  ---------(1)

Ten years later, a shall be twice as old as b  

i.e. age of a will be x + 10 and age of b will  be 2(y+10)

x + 10 = 2 (y + 10)

x + 10 = 2y + 20

x - 2y = 20-10

x - 2y = 10  ---------(2)

By elimination method, we get

x - 3y = -10  

x - 2y = 10  

 - y = -20

y = 20 i.e. present age of b

Substituting y = 20 in equation 1, we get

x - 3y = -10    

x - 3(20) = -10

x - 60 = -10

x = -10 + 60

x = 50 i.e. present age of a.

 

X+ 1/x = 7 then,
cubing both side
= (x +1/x)³ = (7)³
= x³ + 1/x³ + 3×x×1/x×(x+1/x) = 343
= x³ +1/x³ +3(7) = 343
= x³ +1/x³ +21 =343
= x³ +1/x³ =343 - 21
= x³ +1/x³ = 322

Given equation is :

-0.25x + 1.3 = -0.55x – 0.2

-0.25x + 0.55x = -0.2 - 1.3

0.30 x = -1.5

So x = -1.5 / 0.30

x = -5

So option B is correct answer. 

Total no. of outcomes=52
No. of ace cards=4
No. of non-ace cards=48
Probability of getting a non-ace card = No. of favourable outcomes / total no. of outcomes
=48/52=12/13

We have 
Taking LCM,

Multiplying LHS and RHS by x
x²+1=4x
x²-4x+1=0
Which is the required equation.

Since the question doesn’t say that there are only 2 zeros of the polynomial we , there can be n number of polynomials which have two of its zeros as -2 and 5 .So the correct answer is more than 3.

Given equation is :

4x + 3y = 16

Putting x = 1 and y = 4 

4 .1 + 3. 4 = 16

4 + 12 = 16

16 = 16 

So option D is the correct answer.

From the common explanation, we get (C, L) sits at the extreme corner of the table.

Hence, Option D is correct.

Final Arrangement:

Common Explanation:

References:

J sits fourth to the right of O and N sits second to the left of J.

Only H sits between J and G.

Inferences:

From the above references, we get

References:

Only D sits between G and C

G is not an immediate neighbour of J but fifth to the right of I.

M, who sits exactly in the middle, is second to the right of I.

Five persons sit between L and J.

Inferences:

From the above references, we get

References:

E is not an immediate neighbour of N.

Inferences:

From the above reference, we get the final arrangement:

As Ornithologist is a specialist of Birds similarly Archealogist is a specialist of Archealogy.

Second is the process of gradual disappearances of the first.

The All four part of the the figure is identical. So after folding the 2 times of the figure, it will become figure like option C.

From the final arrangement, we get “Q sits second to the right of the one who sits immediate left of M.
Hence, Option C is correct.
References:
O sits 3^rd to the right of N.
One who sits just behind O is to the immediate right of E.
Inferences:
From the above reference, we get the following cases:

References:
B is neither at any of the extreme ends nor sits exactly behind O.
The number of people sitting between C and E, is the same as the number of people sitting between E and B.
Inferences:
From the above reference, we get the following cases:

References:
D doesn’t sit at any of the extreme ends.
P sits on a seat which is exactly ahead of A.
M is not exactly ahead of E.
Inferences:
From the above reference, we get the following cases:
Case 1: Position of D cannot be fixed, thus this case is eliminated.
​​​​​​​
Case 2: We get the final arrangement as below:

Given:

Efficiency of Amit = 2 × Efficiency of Ramit

Concept used:

Total work = Efficiency × Time period

Calculation:

The efficiency of Amit = 2

Efficiency of Ramit = 1

Total work = (2 + 1) × 28 = 3 × 28 = 84

Number of days Ramit takes to complete the whole work = 84/1 = 84

∴ The number of days in Ramit will complete the work is 84 days.