RRB NTPC CBT 1 Question Paper (Held On: 7 Jan 2021 Shift 2) - RRB NTPC/ASM/CA/TA MCQ

The correct answer is Eratosthenes.

Key Points

• Eratosthenes
  • He was the ancient Greek scholar is called the ‘father of geography. Hence, Option 3 is correct.
  • He was the first one to use the word geography and he also had a small-scale notion of the planet that helped him to determine the circumference of the earth.
  • He was multi-talented. He was a Greek mathematician, geographer, poet, astronomer, and music theorist.
  • They calculated the circumference of the Earth without leaving place Egypt
  • In his three-volume work Geography, he described and mapped his entire world known to him, without even dividing the Earth into five climate zones which are given below: Two freezing zones around the poles, two temperate zones, and a zone encompassing the equator and the tropics
  • He was a man of learning and exploring, becoming the chief librarian at the Library of Alexandria
  • He invented the discipline of geography, including the terminology used today.

Additional Information

The pattern followed here is:

Given:

Similarly,

For "When % SSR 2 meet shall you":

Thus, this statement "When % SSR you 2 meet shall" will be the step 2.

Hence, the correct answer is "Option 3".

The logic followed here is:

1¹ + 0 = 1

2² + 1 = 5

3³ + 2 = 29

4⁴ + 3 = 259

Hence, "259" is the correct answer.

Calculation:

Let us assume that 3 + 2√5 is a rational number.

So, it can be written in the form a/b

3 + 2√5 = a/b

Here a and b are coprime numbers and b ≠ 0

Solving 3 + 2√5 = a/b we get,

⇒ 2√5 = a/b – 3

⇒ 2√5 = (a – 3b)/b

⇒ √5 = (a – 3b)/2b

This shows (a – 3b)/2b is a rational number. But we know that √5 is an irrational number.

∴ 3 + 2√5 is an irrational number

In the statement, no newspaper is read by an illiterate. That means an illiterate person does not read the newspaper. By which from option A it says that all newspapers are read by postgraduates but according to the statement it is not true because any literate person and read all newspapers but degree is not defined. From option B some newspapers that are read, are read by postgraduates but according to the statement, it is not true because any literate person and read some newspapers but their degree is not defined. In option c it says that some newspapers are not read by illiterates that means illiterate people can not read some newspapers, so it is correct. In option d it says that no illiterate ever read a newspaper that means it follows the statement so it is correct.

Hence, "option 1" is the correct answer.

Given:

Work done by Amit = 15 days

Work done by Balbir = 10 days

Amit alone works = 3 days after Balbir joins him

Formula used:

Work done = Time × Efficiency

Calculation:

LCM of 15 and 10 = 30

Amit 1 day work = 30/15 = 2 units

Balbir 1 day work = 30/10 = 3 units

Amit alone work for 3 days = 2 × 3 = 6 days

Remaining work = (30 – 6) = 24 days

Work done by Both = 24/(2 + 3)

⇒ 24/5 = days

Work will be finished by Amit and Balbir = ( + 3) = days

∴ Required time to finished the whole work is days

The logic followed here is:

Beijing is the capital of China.

Similarly,

Brasilia is the capital of Brazil.

Whereas;

Shanghai is the city of China, Buenos Aires is the capital of Argentina. And Rio De Janeiro is the city of Brazil.

Hence, "Brasilia" is the correct answer.

The correct answer is ISA.
Key Points

• The International Solar Alliance (ISA)
  • It became a treaty-based international intergovernmental organization on 6^th December 2017.
  • The ISA, headquartered in India, has its Secretariat located on the campus of the National Institute of Solar Energy, Gwalpahari, Gurgaon, Haryana. Hence, Option 3 is correct.
  • The ISA is an Indian initiative, jointly launched by the Prime Minister of India, Narendra Modi, and the President of France on 30^th November 2015 in Paris, on the sidelines of COP-21, the UN Climate Conference.
  • It aims at addressing obstacles to deployment at scale of solar energy through better harmonization and aggregation of demand from solar rich countries lying fully or partially between the Tropic of Cancer and Tropic of Capricorn.

Additional Information

Calculation:
Let the sides of the triangle be 3x, 4x and 5x respectively
we know that the sum of the square of the base side and square of the height side is equal to the square of the
hypotenuse.
AB² + BC² = AC²
⇒ (3x)² + (4x)² = (5x)²
⇒ 9x + 16x = 25x
⇒ 25x = 25x
∴ The sides of a triangle are in the ratio 3 : 4 : 5 the triangle is right angled

The correct answer is 1962.
Key Points
The Indian space program:

• With the setting up of the Indian National Committee for Space Research (INCOSPAR) in 1962, space activities in the country were initiated. Hence, Option 3 is correct.
• In the same year, the work on Thumba Equatorial Rocket Launching Station (TERLS) near Thiruvananthapuram was also started.
• Indian Space Research Organisation (ISRO) was established in August 1969.
• The Government of India constituted the Space Commission and established the Department of Space (DOS) in June 1972 and brought ISRO under DOS in September 1972.
• The Department of Space (DOS) has the primary objective of promoting the development and application of space science and technology to assist in the all-around development of the nation.

Important Points
Towards this, DOS has evolved the following programmes:

• Launch Vehicle programme has the indigenous capability for launching spacecraft.
• INSAT Programme for telecommunications, broadcasting, meteorology, development of education, etc.
• Remote Sensing Programme for application of satellite imagery for various developmental purposes
• Research and Development in Space Sciences and Technology for serving the end of applying them for national development

Additional Information
The Space Commission formulates the policies and oversees the implementation of the Indian space programme to promote the development and application of space science and technology for the socio-economic benefit of the country.
DOS implements these programmes mainly through:

• Indian Space Research Organisation (ISRO)
• Physical Research Laboratory (PRL)
• National Atmospheric Research Laboratory (NARL)
• North Eastern-Space Applications Centre (NESAC)
• Semi-Conductor Laboratory (SCL)

The correct answer is John McCarthy.

Key Points

• John McCarthy is considered the father of Artificial Intelligence.
  • John McCarthy was an American computer scientist.
  • The term "artificial intelligence" was coined by him. Hence, Option 3 is correct.
  • He is one of the founders of artificial intelligence, together with Alan Turing, Marvin Minsky, Allen Newell, and Herbert A. Simon.
  • He co-authored the document that coined the term "artificial intelligence" (AI), developed the Lisp programming language family, significantly influenced the design of the ALGOL programming language, popularized time-sharing, invented garbage collection, and was very influential in the early development of AI.​

Additional Information

The correct answer is K. K. Venugopal.
Key Points
K.K. Venugopal:

• The tenure of Attorney General K.K. Venugopal is extended by the government for a period of one more year with effect from July 1.
• This is the second time the Centre has extended its tenure. He received his first extension of term in 2020.
• He was the 15th Attorney General after senior advocate Mukul Rohatgi and was appointed in July 2017.
• He is the Attorney General of India as of October 2020. Hence, Option 3 is correct.
• He had recently represented the Union of India in a case that led to the cancellation of Class 12 exams due to the pandemic & several sensitive cases, including the challenge to the abrogation of Article 370 and the Citizenship Amendment Act.

Important Points

• Attorney General Of India
  • S/he is the top legal officer in the country & part of the Union Executive.
  • S/he is not considered a government servant.
  • Assisted by 2 Solicitor Generals & 4 Additional Solicitor Generals.
  • Under the Constitution of India, Article 76 deals with for Attorney General of India & Article 165 for the Advocate General of States.
  • Eligibility
  • Qualified to be appointed as Supreme Court judge.
  • Citizen of India.
  • Judge of High Court (HC) for 5 years/advocate HC for 10 years/eminent jurist President’s opinion.
  • Tenure is Not fixed.
  • Appointed by President on Government advice.

Additional Information

The correct answer is BHEL.
Key Points

• Maharatna PSU
  • The Maharatna dispensation was instituted by the Union government in order to enable big Central Public Sector Enterprises (CPSEs) to grow into global giants (introduced in 2010).
  • CPSEs are companies in which the Central Government or other CPSEs own 51 percent or more of the stock.
  • The government has bestowed the title of 'Maharatna' on the state-owned Power Finance Corporation (PFC).
  • The Department of Public Enterprises, which is part of the Ministry of Finance, issued an order to that effect.
  • PFC is the country's 11th public sector business to be granted 'Maharatna' status, joining the names of ONGC, Indian Oil Corporation, Steel Authority of India Limited (SAIL), and BHEL, among others.

Important Points

• Bharat Heavy Electricals Limited (BHEL)
  • It is Maharatna PSU. Hence, Option 1 is correct.
  • It is engaged in the design, engineering, manufacturing, construction, testing, commissioning, and servicing of a wide range of products, systems, and services for the core sectors of the economy.
  • It supplies electric locomotives to the Indian Railways and defense equipment such as the Super Rapid Gun Mount (SRGM) naval guns manufactured in partnership with the Ordnance Factory Board and simulators to the Indian Armed Forces.

Additional Information
List of Maharatna Companies (As of Nov 2021)

Given:

Number of plants = 5625

Concept used:

By using prime factorization

Calculation:

Let the number of rows be x

Number of trees in each row = x

Total number of tree planted = x × x = x²

⇒ x² = 5625

⇒ x = √5625

⇒ x = √5 × 5 × 5 × 5 × 3 × 3

⇒ x = 5 × 5 × 3

⇒ x = 75

∴ The number of plants in each row will be 75

The logic followed here is:

First term is square of 1, then second term is square of 3, then third term is square of 5, then fourth term is square of 7. series of odd number of its square.

Hence, "81" is the correct answer.

The correct answer is Violet and Red.
Key Points

• White light comprises all colors of the VIBGYOR i.e. Violet, Indigo, Blue, Green, Yellow, Orange, Red.
• When we optically combine these colors we get white light.
• The wavelength of light defines the color of the light and in VIBGYOR, wavelength increases from left to right.
• That means Violet color has minimum wavelength while Red color has a maximum wavelength.
• Prism is a triangular slab of transparent glass through which light can pass.
• But before going into prism we must remember that when light passes from one medium to another, it undergoes refraction.
• Refraction is the phenomenon of bending of light when it travels from one medium to another.
• Now the amount of bending of light depends on the wavelength of light.
• The smaller the wavelength of light, the greater is its bending when it passes from one medium to another.
• That is, we can say that the amount of bending of light is inversely proportional to the wavelength of light.
• This property of light leads to the splitting of different colors of light when passed through a prism as shown in the figure.
• Violet bends the most because it has a shorter wavelength compared to other colors and the red color bends the least and can be seen at the end opposite to the base of the prism. Hence, Option 4 is correct.

Given:

Mean = 25

Standard deviation = 5

Formula used:

Coefficient of variation = Standard deviation/Mean × 100

Calculation:

According to the question

⇒ (5/25 × 100)

⇒ 20%

∴ The coefficient of variation is 20%

The correct answer is Warangal.
Key Points

• Pakhal Wildlife Sanctuary
  • It was established in the year 1952 and is located around 50 km away from the town of Warangal, in the state of Telangana. Hence, Option 1 is correct.
  • This town is located in Warangal District.
  • Pakhal Wildlife Sanctuary is located beside Pakhal Lake, which is an artificial lake.
  • Pakhal Wildlife Sanctuary is spread over a total area of 839 sq km and the area of Pakhal Lake is around 30 sq km.
  • The area of Pakhal Wildlife Sanctuary consists of a large plateau bounded by low hills and is rich with diverse natural vegetation, which includes tropical dry deciduous mixed forests, mixed teak, and bamboo forests.
  • There are also various species of animals that can be found here.
  • The natural picturesque magnificence and landscape of Pakhal Wildlife Sanctuary is extremely captivating and attracts several tourists throughout the year.
  • Pakhal Wildlife Sanctuary was established in the year 1952.
  • The man-made Pakhal Lake, situated in the vicinity, was constructed during the first decade of the 13th century (1213 AD), by Ganapati Deva, the Kakatiyan Ruler.
  • The name of Pakhal Wildlife Sanctuary was derived from the name of the person who excavated the lake.

Important Points

• ​Wildlife Sanctuaries
  • Sanctuary is an area that is of adequate ecological, faunal, floral, geomorphological, natural, or zoological significance.
  • The Sanctuary is declared for the purpose of protecting, propagating, or developing wildlife or its environment. Certain rights of people living inside the Sanctuary could be permitted.
  • Wildlife sanctuaries of India are classified as IUCN Category IV protected areas.
  • Wildlife (Protection) Act, 1972 provided for the declaration of certain areas by the State government as wildlife sanctuaries if the area was thought to be of adequate ecological, geomorphological, and natural significance.
  • As of August 2021, 566 wildlife sanctuaries were established in the country which is 3.72 % of the geographical area of the country.
  • The oldest bird sanctuary is Vedanthangal Bird Sanctuary near Chennai in Tamil Nadu state. It was established in 1796.

Given:

Principal = Rs. 4500

Rate = 15%

Time = 74 days (26 march 2018 to 7 june 2018)

Formula used:

SI = (P × R × T)/100

Amount = Principal + SI

Calculation:

According to the question

⇒ [(4500 × 15 × 74)/100 × 365]

⇒ 136.84

Now,

Amount = 4500 + 136.84

⇒ Rs. 4636.84

⇒ Rs. 4635 (approx)

∴ The required amount did she pay to clear her loan is Rs. 4,635 .

Calculation:
Decimal expansion of 109/100 is
⇒ 1 + 0/10 + 9/100
∴ The decimal expansion of 109/100 is 1 + 0/10 + 9/100

Calculation:
⇒ 1/3 = 0.33
⇒ 4/7 = 0.57
⇒ 2/5 = 0.40
The ascending order are 1/3, 2/5, 4/7
∴ The fractions 1/3, 4/7, 2/5 written in ascending order are 1/3, 2/5, 4/7

Given:

Loss = 10%

By selling the same watch = Rs. 140 more

Gain = 4%

Calculation:

Let the cost price be Rs. 100

SP = Rs. 100 – 10 = Rs. 90

When she gained 4%

⇒ Rs. 100 + 4 = Rs. 104

Difference = Rs. (104 – 90) = Rs. 14

If the difference is Rs. 14, the cost price = Rs. 100

If the difference is Rs. 140, the cost price = Rs. 100/14 × 140

⇒ Rs. 1000

∴ The cost price of watch is Rs. 1000

The correct answer is Andaman and Nicobar Island.

Key Points

• India's first Commercial Operation of Sea Plane Services
  • India's first Commercial Operation of Sea Plane Services in the Andaman and Nicobar Islands has begun on 23 January 2011. Hence, Option 2 is correct.
  • The seaplane will fly between Port Blair and Havelock Island.
  • Also, the seaplane will fly up to Barren Island, India's lone active volcano, where tourists will be able to get an aerial view of the volcanic Islands.
  • The seaplane, Cessna Caravan 208 A, is fitted with modern navigation features has a total seating capacity of 10, 8 of them being for passenger seats.
  • It can travel up to 250 km in about an hour and can also land on the ground using the wheel configuration.
  • The seaplane is basically for tourists but local people can also enjoy the flight.
  • The launch of the seaplane service is a step towards faster promotion of the tourism sector in the islands.
  • The launch of the seaplane service will also help improve connectivity between different islands of the Union territory.

Important Points

Given:
f(x) = x²
Calculation:
f(x) = x²
⇒ Range of f = [0, ∞]
It represents the mathematical symbol for infinity (∞\infty∞)
⇒ N on negative numbers
∴ The range of f will be non negative numbers

Assumption 1: Engineers are expected to be better performers by company XYZ - There is no such information that Company XYZ expects Engineers to perform better.

Assumption 2: The company XYZ needs a senior consultant - Yes, company XYZ needs a senior consultant and it is clearly mentioned in its advertisement.

Hence, "option 2" is the correct answer.

The correct answer is Literature.

Key Points

The Swedish Academy

• It is responsible for choosing the Nobel Laureates in Literature. Hence, Option 4 is correct.
• By the terms of Alfred Nobel’s will, the Nobel Prize in Literature has been awarded by the Swedish Academy since 1901.
• The Swedish Academy was founded in 1786 by Swedish King Gustav III.
• The Academy is composed of 18 members whose tenure is for life.
• Known as De Anderton (The Eighteen), current members of the Academy include distinguished Swedish writers, linguists, literary scholars, historians, and prominent jurists.
• Its working body is the Nobel Committee, elected from among its members for a three-year term.

Given:
The space diagonal of a cube = 8√3 cm
Formula used:
Diagonal of cube = √3a
Volume of cube = a³
Calculation:
According to the question
⇒ √3a = 8√3 cm
⇒ a = 8 cm
Now,
Volume of the cube = (8)³
⇒ 8 × 8 × 8 = 512 cm³
∴ The volume of the cube is 512 cm³

The logic followed here is:

Neon, Argon and Helium are the noble gases or inert gases but sodium is an alkali metal.

So, Sodium is different from other.

Hence, "Sodium" is the correct answer.

Total number of students = 47

Anurag's roll number from the end = 18

Anurag's roll number from the beginning = Total number of students - Anurag's roll number from the end + 1

Anurag's roll number from the beginning = 47 - 18 + 1

= 48 - 18

Anurag's roll number from the beginning = 30

Hence, "30" is the correct answer.

First conclusion says that the same fine is charged for littering offence everywhere but in the statement says that don't throw garbage where non littering sign present. So the first conclusion not follow the statement.

In the second conclusion this warning is written at every public place or non-littering zone but in the statement warning is written in particular place not for everywhere. So the second conclusion not follow the statement.

So neither conclusion 1 nor conclusion 2 follow.

Hence, "option 3" is the correct answer.