Bihar Police SI Mains Paper 2 Mock Test - 1 - Bihar Police SI MCQ

• Assertion (A): The rupee is widely accepted as a medium of exchange in India.


• Reason (R): It is authorized by the government of the country.

• Assertion (A) is correct: The rupee is indeed widely accepted as a medium of exchange in India. It is the official currency of the country and is used for all transactions.


• Reason (R) is also correct: The rupee is authorized by the government of India as the legal tender for transactions. It is issued and regulated by the Reserve Bank of India, which is the central monetary authority in the country.


• R is the correct explanation of A: The reason why the rupee is widely accepted as a medium of exchange in India is because it is authorized and backed by the government. The government ensures its stability and acceptance in the economy.

Abu'l Fazl was assassinated while he was returning from the Deccan by Vir Singh Bundela (who later became the ruler of Orchha) between Sarai Vir and Antri (near Narwar) in a plot contrived by Akbar's eldest son Prince Salim (who later became the Emperor Jahangir)[16] in 1602, because Abu'l Fazl was known to oppose the accession of Prince Salim to the throne. His severed head was sent to Salim at Allahabad. Abu'l Fazl was buried at Antri.[17][18] Abu'l Fazl's son Shaikh Afzal Khan (29 December 1571 – 1613) was later appointed governor of Bihar in 1608 by Jahangir.

D is the correct option.The Rigveda is the largest of the four Vedas, and many of its verses appear in the other Vedas. ... Brahmin · Kshatriya · Vaishya · Shudra.The first mention of Varna Vaishya is found in the Purusha Suktam verse of the ancient Sanskrit Rig Veda.

• The Widow Remarriage Association was founded by Vishnu Shastri Pandit in the 1850s in Maharashtra.
• Pandit was a prominent social reformer who worked to promote the remarriage of widows and challenge social stigma against widows in Indian society.
• While Ishwar Chandra Vidyasagar played a significant role in the movement for widow remarriage, especially in Bengal and in the passage of the Widow Remarriage Act of 1856, it was Vishnu Shastri Pandit who specifically established the Widow Remarriage Association.

Therefore, Correct Answer - Option C

Solar energy - Greenhouse effect - Incorrect

• The term ‘Greenhouse effect’ has been derived from a phenomenon that occurs in a greenhouse.
• A greenhouse looks like a small glasshouse and is used for growing plants, especially during winter.
• In a greenhouse, the glass panel lets the light in but does not allow heat to escape.
• Therefore, the greenhouse warms up, very much like inside a car that has been parked in the sun for a few hours. 
• The greenhouse effect is a naturally occurring phenomenon that is responsible for heating of Earth’s surface and atmosphere.
• Solar energy is trapped by the earth atmosphere and radiates slowly so as to cover our earth with a warm blanket.
• This is the natural process of the greenhouse effect on earth to maintain its temperature and makes the earth perfect for life.
• Without the greenhouse effect, the average temperature at the surface of Earth would have been a chilly –18°C rather than the present average of 15°C.
• Carbon dioxide, methane and water vapour are the major greenhouse gases that absorb the infrared radiation from the Earth and re-emit it.
• It is not caused due to solar energy but due to greenhouse gasses.

Thus, the solar energy-greenhouse effect is not the correct pair.

Additional Information

Fossil fuel-burning - Release of CO₂ - Correct

• Carbon dioxide (CO₂) is released into the atmosphere by respiration, the burning of fossil fuels for energy.
• In recent years, their quantities have increased significantly due to the burning of fossil fuels.
• The increased amount of CO₂ in the air is mainly responsible for global warming.

Nuclear power - Radioactive wastes - Correct

• Initially, nuclear energy was hailed as a non-polluting way of generating electricity.
• Later on, it was realised that the use of nuclear energy has very serious inherent problems i.e. the generation of radioactive waste.
• Safe disposal of radioactive wastes is important in nuclear power energy factories.
• Improper disposal of nuclear waste can cause serious physical and biological deformities in living organisms when directly exposed to them. 

Biomass burning - Release of CO₂  - Correct

• Biomass burning means the burning of living or dead vegetation.
• It happens during land cleaning in the agriculture process when crops are out of the field.
• In this process, a high amount of CO₂ is released into the environment.

Krishnadevaraya (also Krishna Deva Raya) was the most important king of Vijayanagar Empire. He believed in the principle that a crowned king should always rule with an eye towards dharma.

A plateau is an elevated landform with a flat or gently sloping surface, rising above the surrounding area. It is distinct from mountains, which have steep slopes and peaks, and plains, which are low-lying flat areas.
Therefore,Correct Answer - Option D

According to our election law, no party or candidate can

i) Bribe or threaten voters;

ii) Appeal to them in the name of caste or religion;

iii) Use government resources for election campaign; and

iv) Spend more than Rs. 25 lakh in a constituency for a Lok Sabha election or Rs. 10 lakh in a constituency in an Assembly election.

The correct answer is D as Zoroasterv’s end Avesta. has nothing to do with India’s trade and commercial contacts with the rest of the world.

Jawaharlal Nehru, India's first Prime Minister, played a vital role in India's active involvement in the United Nations.

Given number: 

5934162

New number after digits are arranged in descending order:

9654321

Thus we can see only position of one digit is remain unchanged.

Hence, the correct answer is "One".

Given:

Mohit got 30% marks and failed by 25 marks

Another student scored 38% and

He got 15 more marks than passing marks

Calculation:

According to the question

⇒ 30% + 25 = 38% – 15

⇒ (38% – 30%) = (15 + 25)

⇒ 8% = 40

⇒ 1% = 5 marks

Now,

5% = 25 marks 

Then,

The necessary pass percentage required = (30% + 5%)

⇒ 35%

∴ Required pass percentage is 35%

From the diagram given below:

The shaded part represents the singers, who are directors but not actors.

Hence, the correct answer is "7".

Preparing the family tree using the following symbols:

A possible tree diagram will be:

Praveena’s father’s sister’s mother is the grandmother of Sandhya.

Hence, "Grandmother" is the correct answer.

Hence, "Printer" is the correct answer.

Important PointsInput Device: A piece of equipment/hardware that helps us enter data into a computer is called an input device. For example keyboard, mouse, etc. 

1. Keyboard:

• A simple device comprising keys and each key denotes either an alphabet, number, or number commands which can be given to a computer for various actions to be performed
• It has a modified version of typewriter keys
• The keyboard is an essential input device and computers and laptops both use keyboards to give commands to the computer

2. Joy Stick:

• It is a device that comprises a stick that is attached at an angle to the base so that it can be moved and controlled
• Mostly used to control the movement in video games
• Apart from a computer system, a joystick is also used in the cockpit of an aeroplane, wheelchairs, cranes, trucks, etc. to operate them well

3. Scanner:

• This device can scan images or text and convert it into a digital signal
• When we place any piece of a document on a scanner, it converts it into a digital signal and displays it on the computer screen

Output Device: A piece of equipment/hardware that gives out the result of the entered input, once it is processed (i.e. converts data from machine language to a human-understandable language), is called an output device. For example printers, monitors, etc. 

Printer:

• A device that makes a copy of the pictorial or textual content, usually over a paper is called a printer
• For example, an author types the entire book on his/her computer and later gets a printout of it, which is in the form of paper and is later published
• Multiple types of printers are also available in the market, which can serve different purposes

The word that can be suffixed to form new words is ‘ure’

Fail + ure = Failure

Press + ure = Pressure

Depart + ure = Departure

Advent + ure = Adventure

Let the number be x.

According to the question,

⇒ 80% of x - 80 = 80

⇒ 80% of x = 80 + 80

⇒ (80/100)x = 160

⇒ 80x = 160 × 100

⇒ x = 16000/80

⇒ x = 200

Hence, the correct answer is "200".

All the terms given in the question are cereals, and maize is also one of the cereals.

As Wick is a part of Candle similarly Wheel is a part of Bicycle.

Total income of the year = 5 × 21,000 + 4 × 24,000 + 3 × 12,000 + 1,80,000 = 4,17,000

Hence, Option B is correct.

HCF is 23. So the other two numbers would be,
(23 * 13) and (23 * 14).
Thus Larger Number = 23 * 14 = 322.

Weight of the car = (180 × 7 – 72 × 6) = 828 kg
Hence, Option B is correct.

Given, LCM = 225, HCF = 5,
First Number = 25 , Second Number = ?
We can find the Second Number with the help of given formula,
"LCM × HCF = 1st Number× 2nd Number"
⇒ 225 × 5 = 25 × 2nd Number

∴ 2nd Number = 45

Total Mango trees = 40%

Remaining trees = (100 – 40 – 50)% = 10%

Hence, Option B is correct.

∠DAC = ∠B + ∠C
(Exterior angle prop. of a Δ ABC)
According to question,
130° = 2A + 3A
5A = 130°
A = 26°
∴ ∠B = 52°; ∠C = 78°

7 × 57 + 7 × 65 = 854
Since the 7th number came twice, it is added two times.
So the answer = 854 – 13 × 60 = 74
Hence, Option D is correct.

X × 20 + 40 – 4 = X × 22
36 = 2X
X = 18
Hence, Option A is correct.

Area of Rectangle = product of length and breadth (L * B)
Area of Parallelogram = A = ½ × d₁ × d₂ sin (y) where d1 & d2 are diagonal and y is the angle of intersection of diagonal.
 
Area of Trapezium = 1/2(sum of parallel sides)*height. 

As Water of a River flows similarly water of Pool is Stagnant.

Let the length of bamboo be x metres.
Length of bamboo above water