Search Previous Year Questions

Find real questions from previous competitive exam papers with answers and solutions.

Leave the keyword blank to browse saved questions for your selected exam, newest papers first. Add a keyword, year or topic to narrow the results.

Browse complete papers
Showing 10 question(s)
Clear

Question 341

WB Police SI 2023• Full Test

Kshetri mine is famous for extracting which metal?

  1. AOption (a)

    Mineral oil

  2. BOption (b)

    Copper

  3. COption (c)

    Iron 

  4. DOption (d)

    Gold

View answer & explanation

Correct answer

Answer: (b)B.

Copper

Why this answer is correct

The correct answer is Copper.

Key Points

  • HCL or Hindustan Copper Limited is the company for extracting the majority of copper in India .
  • This mineral is found mainly in Rajasthan, Madhya Pradesh and in the Chotanagpur region . Khetri mines is one of the famous copper mines of India hence it is the correct option.
  • : Mining is done by both opencast and underground methods in India. The major copper mines are the Khetri copper belt in Rajasthan, Singhbhum copper belt in Jharkhand and Malanjkhand copper belt in Madhya Pradesh which are mined by HCL.

Question 342

WB Police SI 2023• Full Test

Find the missing number by looking at the figure below:

  1. AOption (a)

    436

  2. BOption (b)

    625

  3. COption (c)

    576

  4. DOption (d)

    584

View answer & explanation

Correct answer

Answer: (c)C.

576

Why this answer is correct

The logic followed here is:

Logic: The end of the line represents the square of the number on the other end.

4: 16 → (4)2 = 16

9: 81 → (9)2 = 81

12: 144 → (12)2 = 144

Similarly,

24: ? → (24)2 = 576

Hence, the correct answer is "576".

Question 343

WB Police SI 2023• Full Test

Who is the father of Indian constitution?

  1. AOption (a)

    Bal Gangadhar Tilak

  2. BOption (b)

    Sardar Vallabhbhai Patel

  3. COption (c)

    Dr. B. R. Ambedkar

  4. DOption (d)

    Pandit Jawaharlal Nehru

View answer & explanation

Correct answer

Answer: (c)C.

Dr. B. R. Ambedkar

Why this answer is correct

The correct answer is Dr B.R. Ambedkar.

Key Points 

  • Dr. Bhimrao Ambedkar  is known as the "Father of the Indian Constitution".
  • The Constitution of India was adopted on 26 November 1949.
  • The National Anthem of India was adopted on 24 January 1950.
  • It was decided to declare 26 November as Constitution Day.

Important Points 

  • Vallabhbhai Patel is known as the “Bismarck of India”.
  • Sarojini Naidu is known as the nightingale of India.
  • Dr Sarvapalli Radhakrishnan was known as the bridge builder between India and the West.
  • Mahatma Gandhi is known as the father of nation.

Question 344

WB Police SI 2023• Full Test

The speed of a boat in still water is 10 km/hr. The boat covers a distance of 150 km in 10 hours in downstram. How many hours will the boat take to cover the same distance in upstream?

  1. AOption (a)

    28

  2. BOption (b)

    20

  3. COption (c)

    30

  4. DOption (d)

    24

View answer & explanation

Correct answer

Answer: (c)C.

30

Why this answer is correct

Given:

Speed of boat in still water = 10 km/hr

Distance covered downstream = 150 km

Time taken downstream = 10 hours

Concept:

Speed downstream = Speed of boat + Speed of stream

Speed upstream = Speed of boat - Speed of stream

Calculation:

⇒ Distance = Speed × Time

⇒ 150 = (10 + Speed of stream) × 10

⇒ 150 = 10 × 10 + 10 × Speed of stream

⇒ 150 = 100 + 10 × Speed of stream

⇒ 50 = 10 × Speed of stream

⇒ Speed of stream = 5 km/hr

⇒ Speed upstream = 10 - 5 = 5 km/hr

⇒ Time taken upstream = Distance / Speed upstream

⇒ Time taken upstream = 150 / 5

⇒ Time taken upstream = 30 hours

∴ The boat will take 30 hours to cover the same distance upstream.

Question 345

WB Police SI 2023• Full Test

'Every action has an equal and opposite reaction' — which of Newton's laws of motion?

  1. AOption (a)

    Fourth

  2. BOption (b)

    Second

  3. COption (c)

    First

  4. DOption (d)

    Third

View answer & explanation

Correct answer

Answer: (d)D.

Third

Why this answer is correct

The correct answer is Third.

Key Points

  • According to Newton's third law of motion, every action has an equal and opposite reaction.
  • These two forces act on two different bodies.
  • For example, while swimming, you push the water backward.
  • The water, in turn, pushes you forward.
  • Similarly, while walking, you push the ground backward.
  • The ground then exerts a reaction force on you in the forward direction.

Additional Information

  • Newton: Sir Issac Newton was a great mathematician and physicist. who gave the law of motion and gravitation.
  • Newton gave 3 laws of motion=
  • A body at rest will remain at rest, and body in motion will remain in motion unless it is acted upon by an external force.
  • The force acting on an object is equal to the mass of mass of that object times its acceleration, F=ma
  • For every action, there is an equal and opposite reaction.

Question 346

WB Police SI 2023• Full Test

If in a code language HORSE is represented as 37185, CHAIR is represented as 03941 and REPORT is represented as 152716, then how will be RESEARCH represent in that language?

  1. AOption (a)

    15859104

  2. BOption (b)

    15859103

  3. COption (c)

    15869103

  4. DOption (d)

    15869104

View answer & explanation

Correct answer

Answer: (b)B.

15859103

Why this answer is correct

The logic followed here is:

LetterHORSE
Coded as37185

 

LetterCHAIR
Coded as03941

 

LetterREPORT
Coded as152716

 

LetterRESEARCH
Coded as15859103

Hence the correct answer is Option 2: 15859103

Question 347

WB Police SI 2023• Full Test

Kota city is located in which state of India?

  1. AOption (a)

    Maharashtra

  2. BOption (b)

    Gujarat

  3. COption (c)

    Rajasthan

  4. DOption (d)

    Madhya Pradesh

View answer & explanation

Correct answer

Answer: (c)C.

Rajasthan

Why this answer is correct

The correct answer is Rajasthan.

Key Points

  • Kota previously known as Kotah, is a city in the southeast of the northern Indian state of Rajasthan.
  • It is located about 240 kilometres (149 mi) south of the state capital, Jaipur, situated on the banks of Chambal River.
  • The city of Kota was once the part of the erstwhile Rajput kingdom of Bundi. It became a separate princely state in the 16th century.
  • Apart from the several monuments that reflect the glory of the town, Kota is also known for its palaces and gardens.
  • The city was also included among 98 Indian cities for Smart Cities Mission initiated by Indian Prime Minister Narendra Modi in 2015[1

Question 348

WB Police SI 2023• Full Test

Which of the following metal is used the most in the construction of aircraft structures?

  1. AOption (a)

    Aluminum

  2. BOption (b)

    Copper

  3. COption (c)

    Iron

  4. DOption (d)

    Nickel

View answer & explanation

Correct answer

Answer: (a)A.

Aluminum

Why this answer is correct

The correct answer is Alluminum

Key Points

  • Aluminum (blended with small quantities of other metals) is used on most types of aircraft because it is lightweight and strong. Aluminum alloys don't corrode as readily as steel. ..
  • . It has also been used for the skin of some high-speed airplanes, because it holds its strength at higher temperatures better than aluminum.
  • Because the metal resists corrosion, some airlines don't paint their planes, saving several hundred of kilograms in weight.Aircraft manufacturers use high-strength alloys (principally alloy 7075) to strengthen aluminium aircraft structures.

Question 349

WB Police SI 2023• Full Test

Find the odd word:

  1. AOption (a)

    Pink

  2. BOption (b)

    Blue

  3. COption (c)

    Red

  4. DOption (d)

    Green

View answer & explanation

Correct answer

Answer: (a)A.

Pink

Why this answer is correct

The logic followed here is:

Logic: Red, Blue, and Green are primary colors in the RGB color model which is widely used in digital displays. Given this analysis and usual categorizations, Pink stands out as it is not considered a primary color in the RGB color model, unlike Red, Blue, and Green.

Thus, the odd word is Pink.

Hence, the correct answer is "Pink".

Question 350

WB Police SI 2023• Full Test

If the word POLICE is written as GAKJQN in a language, then how will be the word ARREST written in that language?

  1. AOption (a)

    YPGPTV

  2. BOption (b)

    VQGPTY

  3. COption (c)

    VGQPTY

  4. DOption (d)

    PTYGVQ

View answer & explanation

Correct answer

Answer: (b)B.

VQGPTY

Why this answer is correct

The logic followed here is:

POLICE: GAKJQN

Similarly,

ARREST: ?

Hence, the correct answer is "VQGPTY".