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Question 61

Kolkata Police SI 2021• Test

India imports most of its crude oil from which of the following countries? 

  1. AOption (a)

    Iran

  2. BOption (b)

    Iraq

  3. COption (c)

    Ukraine

  4. DOption (d)

    USA

View answer & explanation

Correct answer

Answer: (b)B.

Iraq

Why this answer is correct

The correct answer is Iraq.

Key Points

  • In 2021-22, India imported 22.1 billion dollars worth of crude oil from Iraq.
  • India imports most of its crude oil from Iraq in 2021 to 22
  • This is the highest amount of crude oil that India imported from any country in 2021-22.
  • Saudi Arabia and the United States were the second and third largest suppliers of crude oil to India, respectively.
  • India is the world's third-largest consumer of crude oil.
  • India imports more than 85% of its crude oil requirements..

Additional Information 

RankCountryValue (billion USD)
1Iraq22.1
2Saudi Arabia15.8
3United States9.68
4United Arab Emirates9.35

Question 62

Kolkata Police SI 2021• Test

56% of Y is 182. What is the value of Y? 

  1. AOption (a)

    330

  2. BOption (b)

    364

  3. COption (c)

    350

  4. DOption (d)

    325

View answer & explanation

Correct answer

Answer: (d)D.

325

Why this answer is correct

Given:

 

56% of Y = 182

 

Concept:

 

To solve this problem, we can use the following formula:

 

Percentage = (part / whole) × 100

 

Solution:

 

Rewrite the given information as follows:

 

(56 / 100) × Y = 182

 

Solve the equation for Y:

 

Y = (182 × 100) / 56 = 325

 

Therefore, The value of Y is 325.

Question 63

Kolkata Police SI 2021• Test

Which Union Ministry implements the 'Pradhan Mantri Gram Sadak Yojana' scheme?  

  1. AOption (a)

    Ministry of Panchayati Raj

  2. BOption (b)

    Ministry of Road Transport and Highways

  3. COption (c)

    Ministry of Agriculture

  4. DOption (d)

    Ministry of Rural Development

View answer & explanation

Correct answer

Answer: (d)D.

Ministry of Rural Development

Why this answer is correct

The Correct Answer is the Ministry of Rural Development. 

Key Points

  • The Pradhan Mantri Gram Sadak Yojana is a nationwide plan in India to provide good all-weather road connectivity to unconnected villages.
  • Of 178,000 (1.7 lakh) habitations with a population of above 500 in the plains and above 250 in the hilly areas planned to be connected by all-weather roads, 82% were already connected by December 2017 and work-in-progress on the remaining 47,000 habitations was on track for completion by March 2019.
  • This Centrally Sponsored Scheme was introduced in 2000 by the then-prime minister of India Late Shri Atal Bihari Vajpayee.
  • The PMGSY is under the authority of the Ministry of Rural Development and was begun on 15 th August 2000.
  • It is fully funded by the central government. In November 2015, following the recommendations of the 14th Finance Commission, the Sub-Group of Chief Ministers on Rationalization of Centrally Sponsored Schemes, it was announced that the project will be funded by both the central government (60%) and states (40%).

Question 64

Kolkata Police SI 2021• Test

Present ages of A and B are in the ratio 5 ∶ 6. After seven years this ratio becomes 6 ∶ 7. Then the present age of A in years is 

  1. AOption (a)

    32

  2. BOption (b)

    30

  3. COption (c)

    33

  4. DOption (d)

    35

View answer & explanation

Correct answer

Answer: (d)D.

35

Why this answer is correct

Given Data:

 

Present ages of A and B are in the ratio 5:6.

 

After 7 years, the new ages of A and B are in the ratio 6:7.

 

Concept or Formula:

 

We can construct two equations based on the given data, using the concept of ratios and the standard formula for calculating ages.

 

Solution

 

Let A's current age be 5x and B's age be 6x, according to the ratio given.

 

⇒ A = 5x, B = 6x

 

After 7 years, A will be 5x+7 years and B will be 6x+7 years. But it's given that the ratio of their ages will be 6:7 after 7 years.

 

⇒ (5x + 7)/(6x + 7) = 6/7

 

Now we solve the equation (5x + 7)/(6x + 7) = 6/7.

 

⇒ 7 * (5x + 7) = 6 * (6x + 7) ⇒ 35x + 49 = 36x + 42 ⇒ x = 7

 

Substitute x=7 into the equation A = 5x. ⇒ A = 5*7 ⇒ A = 35

 

Therefore, the present age of 'A' is 35 years.

Question 65

Kolkata Police SI 2021• Test

Which one of the following is an example of chemical change?

  1. AOption (a)

    Preparation of ice cubes from water

  2. BOption (b)

    Magnetization of soft iron 

  3. COption (c)

    Burning of paper

  4. DOption (d)

    Dissolution of cane sugar in water

View answer & explanation

Correct answer

Answer: (c)C.

Burning of paper

Why this answer is correct

The correct answer is Burning of paper.

Key Points

  • A chemical change involves a chemical reaction, with new substances produced as a result of the change.
  • Burning of paper is a chemical change.
  • Burning (combustion) is a chemical reaction that combines combustible material (in this case, paper) with an oxidant (oxygen in the air) to produce new substances (heat, light, ash, gases like carbon dioxide and water vapour).
  • The products of this process have different properties from the original paper and oxygen, showing that a new substance is produced.

Additional Information

  • Preparation of ice cubes from water: This is not a chemical change but a physical change. The conversion of water to ice is a phase change. No new substances are produced; water is still H2O in both solid (ice) and liquid states.
  • Magnetization of soft iron: This is also a physical change. It involves the alignment of atoms in the iron which had previously been randomly distributed. No new substance is formed.
  • Dissolution of cane sugar in water: This is a physical change, not a chemical change. The sugar molecules are dispersed within the water, but no new substance is formed. Sugar dissolved in water can be recovered by letting the water evaporate.

Question 66

Kolkata Police SI 2021• Test

12 men construct 1.5 km of road in 7 days. 28 men will construct 12 km of roads in how many days?

  1. AOption (a)

    38 days

  2. BOption (b)

    24 days

  3. COption (c)

    20 days

  4. DOption (d)

    28 days

View answer & explanation

Correct answer

Answer: (b)B.

24 days

Why this answer is correct

Given Data:

 

12 men can construct 1.5 km of road in 7 days.

 

28 men are required to construct 12 km of road.

 

Concept/Formula Used:

 

The concept of man-days in work problems. If a person can do a job in 'n' days, then his 1 day's work can be given as 1/n.

 

Solution:

 

Find out how many man-days are required to construct 1.5 km of road:

 

⇒ 12 men × 7 days = 84 man-days

 

Calculate how many man-days are required to construct 1 km of the road:

 

⇒ 84 man-days ÷ 1.5 km = 56 man-days/km

 

Determine how many man-days will be required to construct 12 km of road:

 

⇒ 56 man-days/km × 12 km = 672 man-days

 

⇒ 672 man-days ÷ 28 men = 24 days

 

it will take 28 men 24 days to construct 12 km of road.

 

Hence, the correct answer is "24 days".

Question 67

Kolkata Police SI 2021• Test

Railway Staff College is located at 

  1. AOption (a)

    Mussoorie

  2. BOption (b)

    Hyderabad

  3. COption (c)

    Pune

  4. DOption (d)

    Vadodara

View answer & explanation

Correct answer

Answer: (d)D.

Vadodara

Why this answer is correct

The correct answer is Vadodara.

Key Points

  • The Railway Staff College is also called " The National Academy of Indian Railway ".
  • It is a centralized civil service, engineering, and medical training institute.
  • It is located in Vadodara, Gujarat.
  • It was founded in the year 1988.
  • The current Director-General of the academy is Shri Sanjay Pal Singh Chauhan.
  • The faculty of the academy comprises 24 experts drawn from various departments.
  • Sports facilities are also available at the academy for different games.
  • Several training programs also take place at the academy such as -
  • Centralized training for IRAS, IRSS, IRPS, and IRMS.
  • Foundation and Induction Program for Group A and B officers.
  • Mid Service training
  • Special Courses
  • BIMSTEC training program.

Question 68

Kolkata Police SI 2021• Test

Find the odd number pair.

  1. AOption (a)

    104 ∶ 78

  2. BOption (b)

    96 ∶ 80

  3. COption (c)

    64 ∶ 48

  4. DOption (d)

    80 ∶ 60  

View answer & explanation

Correct answer

Answer: (b)B.

96 ∶ 80

Why this answer is correct

The logic followed here is:

The first number is divided by 8 and the Second number divided by 6, so we get the same number

1) 104 ∶ 78

104 ÷ 8 = 13 , 78 ÷ 6 = 13 

2) 96 ∶ 80 

96 ÷ 8 = 12 , 80 ÷ 6 = 13.33 

  1. 64 ∶ 48

64 ÷ 8 = 8 , 48 ÷ 6 =  8

  1. 80 ∶ 60  

80 ÷ 8 = 10 , 60 ÷ 6 =  10

Hence, the correct answer is option 2.

Question 69

Kolkata Police SI 2021• Test

Rickets disease is caused due to deficiency of

  1. AOption (a)

    Vitamin D

  2. BOption (b)

    Vitamin B

  3. COption (c)

    Vitamin A

  4. DOption (d)

    Vitamin C

View answer & explanation

Correct answer

Answer: (a)A.

Vitamin D

Why this answer is correct

The correct answer is Vitamin D.

Key Points

  • Rickets in poultry is caused mainly by deficiencies of either vitamin D3, calcium, phosphorus, or calcium-phosphorus imbalance.
  • Rickets is a childhood disorder of the bones where the bones become soft and prone to fractures. Bones tend to become weak due to an inadequate supply of nutrients, Vitamin D3 in particular.
  • It is also caused due to a lack of calcium and phosphate in the body. Weak bones can lead to bone deformities.
  • Vitamin D primarily comes from exposing the skin to sunlight.
  • Other good sources of Vitamin D are fatty fish (such as tuna and salmon) and egg yolks.
  • Rickets is a disease associated with the deficiency of Vitamin D.
  • Rickets is of the following types:
  • Nutritional Rickets–
  • This is caused due to intake of food which lacks calcium, phosphorous, and vitamin D.
  • Hypophosphatemic Rickets-
  • It is caused due to low levels of phosphate. It is an X-linked genetic disorder where the kidneys are not able to control the amount of phosphate excreted in the urine.
  • Renal Rickets-
  • People suffering from kidney disorders have renal rickets. They cannot regulate the amount of calcium and phosphate excreted in the urine.

Additional Information

VitaminSourcesDeficiency may lead to:
A (Retinol)Animal sources: eggs, liver, butter, Plant sources: Leafy, Dark green vegetables like spinach, Carrot, and MangoesNight Blindness, Poor Vision
B1(Thiamine)Pork, nuts and seeds, eggs, whole grain cerealsBeri Beri
B2(Riboflavin)Milk and milk products, green leafy vegetables, whole grain cerealsRetarded growth, bad skin
B3(Niacin)Meat, fish, poultry, whole grain cereals, mushroomPellagra - includes inflammation of the skin (dermatitis), vomiting, diarrhea, headache, fatigue, and memory loss
B12
(Cyanocobalamin)
Meat, poultry, fish, seeds Not found in Plant foodsAnaemia
C
(Ascorbic Acid)
Lime, lemon. Oranges, strawberries, tomato, papaya, mango etcScurvy – fatigue, swollen gums, loose teeth
D (Calciferol)Milk, fish, liver oil, sunlightRickets -  brittle bones, in children, which bend or break easily
E (Tocopherol)Green leafy vegetables, liver, egg, nuts, and seedsIt can cause nerve and muscle damage that results in loss of sensation in the arms and legs, loss of body movement and control, and muscle weakness.
K (Phylloquinone)Green leafy vegetables such as broccoli, spinach, kale, etcExcessive bleeding due to injury

Question 70

Kolkata Police SI 2021• Test

A statement is given followed by some conclusions. Choose the conclusion which logically follows from the given statement.

Statement: Most dresses in that shop are expensive.

Conclusions:

  1. AOption (a)

    Some dresses in that shop are expensive.

  2. BOption (b)

    Handloom dresses in that shop are cheap.

  3. COption (c)

    There are no cheap dresses available in that shop.

  4. DOption (d)

    There are cheap dresses also in that shop.

View answer & explanation

Correct answer

Answer: (a)A.

Some dresses in that shop are expensive.

Why this answer is correct

The statement implies that "most dresses in that shop are expensive" but not all. Hence, there might be some dresses that are cheap.

From the given conclusions:

1) Some dresses in that shop are expensive.

This logically follows from the statement as it is clearly stated that most, not all, dresses are expensive.

  1. Handloom dresses in that shop are cheap.

We cannot infer this from the given statement because the price of handloom dresses is not specified in the statement.

  1. There are no cheap dresses available in that shop.

This does not follow from the given statement, because the statement implies that while most dresses are expensive, there could be some that are not.

4)There are cheap dresses also in that shop.

This could potentially be true given that the statement says most, but not all, dresses are expensive, but it does not logically follow directly from the statement.

Therefore, the correct answer is  Some dresses in that shop are expensive.