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RRB JE CBT 1 - Full Test 4 - Railways MCQ


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100 Questions MCQ Test RRB JE (Railways Junior Engineer) CBT Mock Test Series 2025 - RRB JE CBT 1 - Full Test 4

RRB JE CBT 1 - Full Test 4 for Railways 2024 is part of RRB JE (Railways Junior Engineer) CBT Mock Test Series 2025 preparation. The RRB JE CBT 1 - Full Test 4 questions and answers have been prepared according to the Railways exam syllabus.The RRB JE CBT 1 - Full Test 4 MCQs are made for Railways 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for RRB JE CBT 1 - Full Test 4 below.
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RRB JE CBT 1 - Full Test 4 - Question 1

The dimensions of a cuboid are 8 cm × 4 cm × 27 cm. How many cubes of side 2 cm can be made by melting the cuboid?

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 1

Let the no. of cubes of side a that can be made by melting the given cuboid = n

Total volume of these cubes = na3

Total volume of all the smaller cubes is equal to the volume of the original cube

As a = 2

⇒ 8 cm × 4 cm × 27 cm = 2× n

⇒ n = 108

RRB JE CBT 1 - Full Test 4 - Question 2

Amalgam is an alloy of a metal with ________.

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 2

An amalgam is an alloy of mercury with another metal. Almost all metals can form amalgams with mercury, the notable exceptions being iron, platinum, tungsten, and tantalum. Silver - mercury amalgams are important in dentistry, and gold - mercury amalgam is used in the extraction of gold from ore. 

RRB JE CBT 1 - Full Test 4 - Question 3

Which of the following disease is caused by female Anopheles mosquito?

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 3

Malaria is an infectious disease caused by parasitic protozoans and is spread by vectors such as the female Anopheles mosquito. Malaria causes symptoms that typically include fever, tiredness, vomiting, and headaches.

RRB JE CBT 1 - Full Test 4 - Question 4

What was the main aim of the Basel Convention?

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 4

The objective of the Basel Convention on the Control of Transboundary Movements of Hazardous Wastes and their Disposal. Also to protect human health and the environment against the adverse effects of hazardous wastes.

RRB JE CBT 1 - Full Test 4 - Question 5

The value of sin2 15° + sin2 20°  + sin2 25° + ….. + sin2 75°?

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 5

sin15° + sin20° + sin25° + ..... sin75°

= [cos (90° - 15°)]2 + [cos (90° - 20°)]2 + ..... [cos (90° - 75°)]2 [cos (90 - θ) = sinθ]

= cos75° + cos70° + cos65° + ...... cos15°

= cos15° + cos20° + cos25° + ..... cos75°

RRB JE CBT 1 - Full Test 4 - Question 6

A, B and C together can complete a work in 25 days. If the ratio of efficiency of A, B and C is 15 ∶ 10 ∶ 6 respectively, then in how many days C alone can complete the same work?

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 6

Ratio of efficiency of A, B and C = 15 ∶ 10 ∶ 6

Ratio of time of A, B and C = 1/15 ∶ 1/10 ∶ 1/6 = 2 ∶ 3 ∶ 5

Let A alone can complete the work in = 2x days

B alone can complete the work in = 3x days

And C alone can complete the work in = 5x days

According to the question,

1/2x + 1/3x + 1/5x = 1/25

⇒ 31/30x = 1/25

⇒ x = 155/6

So, C alone can complete the work in = 5x = 5 × 155/6 = 775/6 days

Short trick:

Total work = (15 + 10 + 6) × 25 = 31 × 25 = 775

∴ C will complete the work = 775/6

RRB JE CBT 1 - Full Test 4 - Question 7

Pench National Park is located in?

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 7

Pench National Park is located in Madhya Pradesh

RRB JE CBT 1 - Full Test 4 - Question 8

Direction: In the question below is given a statement followed by two conclusions numbered I and II. You have to assume everything in the statement to be true, then consider the two conclusions together and decide which of them logically followed and decide which of them logically followed beyond a reasonable doubt from the information given in the statement.

Statement: Student who misbehaves in the school premises brings a bad name to himself as well as to the school.

Conclusions:
1. Such students should be given a warning and should undergo a counseling session.
2. Such students should be removed from the school.

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 8

The correct answer is option 2, Neither I nor II follows, as both statements I and II are courses of actions and not conclusions. 

RRB JE CBT 1 - Full Test 4 - Question 9

Quinine is obtained from a plant. Part of the plant yields the drug?

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 9

Quinine is an alkaloid found in the stem bark of the cinchona tree. It has been used to treat malaria since the early 1600s. It also is used as a medication for babesiosis.

RRB JE CBT 1 - Full Test 4 - Question 10

If the compound ratio of [3x : (4x + 3)] and [(5x - 2) : 2x] is 14 : 9, find the value of x.

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 10

As we know, the compound ratio for the ratios (a : d), (b : e), (c : f) is (abc : def)

Hence, for the given ratios, compound ratio is obtained as,

⇒ [3x/(4x + 3)] × [(5x - 2)/2x] = 14/9

⇒ 3 × 9 × (5x - 2) = 2 × 14 × (4x + 3)

⇒ 135x - 54 = 112x + 84

⇒ 135x - 112x = 54 + 84

⇒ 23x = 138

⇒ x = 138/23

∴ x = 6

RRB JE CBT 1 - Full Test 4 - Question 11

German silver has which of the following compositions?

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 11

German silver or simply nickel silver is metallic alloy used for mainly production of musical instruments. German silver made up of 60% copper, 20% zinc and 20% nickel.

RRB JE CBT 1 - Full Test 4 - Question 12

What is the unit’s digit of 22471?

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 12

The given number is 22471

The unit digit of 2.

⇒ 2= 2

⇒ 2= 4

⇒ 2= 8

⇒ 2= 6

⇒ 2= 2

Here, the digit is repeating after every 4th power.

Now,

⇒ 22471 = 22468 × 223 = (224)117 × 223

The unit digit of expression (224)117 × 223

⇒ (224)117 × 223 = 6 × 2 × 2 × 2 = 8

Hence, the unit digit of 22471 = 8.

RRB JE CBT 1 - Full Test 4 - Question 13

Choose the CORRECT option for the figure shown below.

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 13

As, the length of two tangents drawn from an external point to a circle are equal

⇒ AD = AF

⇒ BD = BE

⇒ FC = CE

∴ All options are correct

RRB JE CBT 1 - Full Test 4 - Question 14

The concept of single citizenship in the Indian Constitution is inspired from which country?

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 14
  • Though the Indian Constitution is federal and envisages dual polity, it provides for only single citizenship unlike U.S.A that has dual citizenship.
  • This feature has been adopted from the British Constitution. 
RRB JE CBT 1 - Full Test 4 - Question 15

Plants which grow in salty water near the sea shore are called ______.

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 15

A halophyte is a plant that grows in salty water coming into contact with saline water through its roots or by salt spray, such as in saline semi-deserts, mangrove swamps, marshes and sloughs and seashores.

RRB JE CBT 1 - Full Test 4 - Question 16

Sarthak moves from his house towards west, after walking a distance of 30 m, he turned towards right and walked 20 m. He then turned left and moving a distance of 10 m, turned to his left again and walked 40 m. He now turns to the left and walks 5 m. Finally, he turns to his left. In which direction is he walking now?

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 16


Clearly, Sarthak finally walking in the direction towards - North.

RRB JE CBT 1 - Full Test 4 - Question 17

What is the shape of the Atlantic Ocean?

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 17
  • The shape of the Atlantic Ocean is of an S’ shaped basin.
  • It extends between Europe and Africa to the east and the Americas to the west.
  • The Atlantic Ocean is the second largest ocean in the World after the Pacific Ocean.
RRB JE CBT 1 - Full Test 4 - Question 18

Which instrument measures AF(Audio Frequency) signal level and noise?

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 18

The Psophometer measures AF(Audio Frequency) signal level and noise.

RRB JE CBT 1 - Full Test 4 - Question 19

Why Taj Mahal is suffering from "Marble Cancer"?

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 19
  • Marble cancer refers to the corrosion of structure made up of marble by the action of sulphuric or nitric acid.
  • In the last decade, there was huge industrial growth nearby Taj Mahal, and the huge amount of sulfur and nitric gases are released in the atmosphere by industries.
  • These gases mixed with rain cause acid rain. And The Taj Mahal is losing its white shine because of marble cancer.
RRB JE CBT 1 - Full Test 4 - Question 20

Which of the following metals is not present in the alloy of Gun Metal?

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 20

Gunmetal, also known as red brass, is a type of bronze an alloy of copper, tin, and zinc. Proportions vary by source, but 88% copper, 8-10% tin, and 2–4% zinc is an approximation. 

  • It was used mainly for making guns and bullets. Now it is superseded by Steel.
  • Gunmetal is used extensively for making heavy machinery parts as it can withstand high pressure and is corrosion resistant.
RRB JE CBT 1 - Full Test 4 - Question 21

Iron rusts because of ______ reaction.

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 21

Rusting of Iron takes place due to redox reaction.

  • Rust is an iron oxide, a usually red oxide formed by the redox reaction of iron and oxygen in the presence of water or air moisture.
  • Fe + O → Fe2O3 (Iron (III)oxide)

Hence, 4 is the correct answer.

RRB JE CBT 1 - Full Test 4 - Question 22

A piece of paper is folded and punched as shown below in the question figures. From the given answer figures, indicate how it will appear when opened?
      

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 22


Hence, the answer is figure given in option 1.

RRB JE CBT 1 - Full Test 4 - Question 23

In the following question, select the missing number from the given series.
16, 80, 64, 256, ?, 576, 384, ?

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 23

The pattern followed here is,

16 × 5 = 80,

80 - 16 = 64,

64 × 4 = 256,

256 - 64 = 192,

192 ​× 3 = 576,

576 - 192 = 384,

384 ​× 2 = 768

Hence, 192, 768 are the missing number.

RRB JE CBT 1 - Full Test 4 - Question 24

What is the main function of ribosomes in the cell?

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 24
  • The main function of ribosomes is the synthesis of vital proteins inside the cell.
  • The ribosome molecules link amino acids, which are the building blocks of protein structures, in different combinations to form different proteins.
  • The linking process is governed by messenger RNA molecules.
RRB JE CBT 1 - Full Test 4 - Question 25

[22+ 32 + 42 + 52 + 62 + 72 + 82 + 92 + 10+ 112] is equal to

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 25

The given expression:

[22+ 32 + 42 + 52 + 62 + 72 + 82 + 92 + 10+ 112]

= [12 +22+ 32 + 42 + 52 + 62 + 72 + 82 + 92 + 10+ 112] – 1

= The sum of squares of first 11 natural numbers – 1

[We know that, the sum of square(s) of 1st n natural numbers =

Here n = 11]

= The sum of squares of first 11 natural numbers – 1

= 506 – 1

= 505

RRB JE CBT 1 - Full Test 4 - Question 26

When is World Earth Day celebrated?

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 26

RRB JE CBT 1 - Full Test 4 - Question 27

Who is the author of a book named “Das Kapital”?

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 27
  • Das Kapital, also known as Capital. Critique of Political Economy by Karl Marx is a foundational theoretical text in materialist philosophy, economics and politics. 
  • Marx aimed to reveal the economic patterns underpinning the capitalist mode of production, in contrast to classical political economists such as Adam Smith, Jean-Baptiste Say, David Ricardo and John Stuart Mill.
RRB JE CBT 1 - Full Test 4 - Question 28

What is the escape velocity of Earth?

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 28
  • Escape velocity is the minimum velocity an object must have in order to escape the gravitational field of the earth.
  • The formula for escape velocity is  

where

G = Universal gravitational constant

M = Mass of the planet or moon (kg)

R = Radius of the planet or moon (m)

RRB JE CBT 1 - Full Test 4 - Question 29

On what principle does the difference between the compound interest and the simple interest for 3 years at 10% is Rs. 31?

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 29

The formula for annual compound interest is:

Where:

A = the future value of the investment/loan, including interest

P = the principal investment amount (the initial deposit or loan amount)

r = the annual interest rate

n = the number of times that interest is compounded per year

t = the number of years the money is invested or borrowed for.

n = 1 [As the amount is compounded annually]

t = 3 years

r = 10% compounded annually

A = P + Compound Interest (CI)

Now from the formula,


⇒ CI = 1.331P – P = 0.331P

Now the formula for simple interest:

Interest = Principal × Rate percent × Time ÷ 100

Here, principal = Rs. P

Rate percent = 10

Time = 3 years

Putting the values in the formula, we get

Simple interest for 3 years:

 = Rs. P × 10 × 3 ÷ 100

= Rs. 0.3P

According to the question, the difference between the compound interest and the simple interest for 3 year at 10% is Rs. 31.

⇒ 0.331P – 0.3P = 31

⇒ 0.031P = 31

⇒ P = Rs. 1000

RRB JE CBT 1 - Full Test 4 - Question 30

Why is argon gas used along with tungsten wire in an electric bulb?

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 30

Argon gas is used in electric bulbs to stop the oxygen in the light bulbs from corroding the hot tungsten filament which in result increase the life of a bulb.

RRB JE CBT 1 - Full Test 4 - Question 31

Directions: In the following question, three statements are given followed by four conclusions I, II, III and IV. You have to consider the given statements to be true even if they seem to be at variance with commonly known facts. Read all the conclusions and decide which of the following logically follows from the given statements disregarding the commonly known facts.

Statements:
All trousers are clothing.
No shirt is trouser.
Some tees are shirts.

Conclusions:
I. At least some tees are trousers.
II. All clothing being tees is a possibility.
III. All shirts are tees.
IV. Some clothing is definitely shirts.

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 31

Consider the following least possible Venn diagram,


Conclusions:
I. At least some tees are trousers → it’s possible but not definite, hence false.
II. All clothing being tees is a possibility → possibility is true as shown below.

III. All shirts are tees → it’s possible but not definite, hence false.
IV. Some clothing are definitely shirts → it’s possible but not definite, hence false.

Hence only conclusion II follows.

RRB JE CBT 1 - Full Test 4 - Question 32

When resistors are connected in series, then net resistance _____.

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 32
  • Resistors are connected both in “series” and “parallel
  • When resistors are connected in series, then the net resistance is equal to the sum of all the resistors connected in series due to that  the net resistance increases
RRB JE CBT 1 - Full Test 4 - Question 33

A B and C invest to start a restaurant. The total investment was Rs. 3 lakhs. B invested in Rs. 50,000 more than A and C invested Rs. 25,000 less than B. If the profit at the end of the year was Rs. 14,400 then what is C's share of the profit (in Rs)?

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 33

Let investment by A be Rs. N

Then investment by B will be N + 50000 and investment by C will be N + 25000,

 Since total investment is Rs. 3 lakhs,

⇒ N + N + 50000 + N + 25000 = 300000

⇒ 3N = 225000

⇒ N = 75000

⇒ Investment by A = 75000

⇒ Investment by B = 125000

⇒ Investment by C = 100000

⇒ Ratio of Investment = 3 : 5 : 4

⇒ Ratio of profit = 3 : 5 : 4

Since Total profit = 14400

∴ Profit received by C = 4/12 × 14400 = 4800

RRB JE CBT 1 - Full Test 4 - Question 34

What will come in place of question mark in the following question?

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 34

RRB JE CBT 1 - Full Test 4 - Question 35

The mirror used in automobiles to see the rear field of view is _____ mirror.

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 35
  • The mirror used in automobiles to see the rear field of view is a convex mirror. It is a mirror whose reflecting surface emerges from outside.
  • The mirror whose reflecting surface emerges inwardly is called a concave mirror.
  • A plane mirror has a flat reflective surface.
RRB JE CBT 1 - Full Test 4 - Question 36

In a certain code ‘MATHEMATICS’ is written as ‘502#45023$9’ and ‘LOGIC’ is written as ‘8&63$’. How is ‘CHEMICAL’ written in that code?

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 36

The codes have been assigned as follows,


Similarly,

Hence, the code for ‘CHEMICAL’ is ‘$#453$08’.

RRB JE CBT 1 - Full Test 4 - Question 37

The average age of a family of four members is 23 years. The age of the youngest member is 5 years. Find the average age of the family just before the birth of the youngest member.

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 37

Sum of the age of all members = 23 × 4 = 92

Age of the youngest member = 5

Sum of the ages of all members at the time of birth of youngest member = 92 - (5 × 4) = 72

Average age at the time of birth of youngest member = 72/3 = 24

RRB JE CBT 1 - Full Test 4 - Question 38

Digestion in humans starts from which of the following parts of the human body?

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 38
  • The process of digestion in humans starts from the mouth.
  • The saliva secreted by the salivary glands contains enzyme ptyalin, which acts upon some polysaccharides and breakdown into disaccharide like maltose.
  • The food then transfers from the esophagus to the stomach where it gets digested.
  • The small intestine absorbs all the nutrients from what we eat and drink.
  • The large intestine absorbs water from the wastes and creates stool.
RRB JE CBT 1 - Full Test 4 - Question 39

Rural households have more purchasing power than do urban households at the same income level, since some of the income urban and suburban households use for food and shelter can be used by the rural households for other needs.

Q. Which of the following inferences is best supported by the statement made above?

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 39

Option 1 is not an inference because the passage simply states the difference between the purchasing power of rural and urban households. It is not discussing the number of people.

Option 2 is an inference because the passage clearly states that the higher purchasing power of rural households can be attributed to the fact that urban and suburban households have higher food and housing costs. Conversely, rural households have lower food and housing costs.

Option 3 would be a wrong inference because the difference has been cited between rural households on one hand and urban and suburban households on the other.

Option 4 cannot be inferred because no information about the median income of the households has been provided.

RRB JE CBT 1 - Full Test 4 - Question 40

In the following question, select the correct match from the given alternatives to complete the series.
Pb3, Rc6, Td12, Ve24, ?

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 40


Thus, Xf48 will complete the series.

RRB JE CBT 1 - Full Test 4 - Question 41

Bone-in most big animals is an example of which of the following tissues?

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 41
  • Bone in most big animals is an example of Connective tissues.
  • Connective tissue (CT) is one of the four basic types of animal tissue along with epithelial tissue, muscle tissue, and nervous tissue.
  • Connective tissue is found in between other tissues everywhere in the body, including the nervous system.
RRB JE CBT 1 - Full Test 4 - Question 42

In the following question, select the odd word from the given alternatives.

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 42

Here, the first word is the profession and second is the name of the person who is involved in this profession.

1. Doctor : Physician → Physician is a person whose profession is Doctor.

2. Journalism : Journalist → Journalist is a person whose profession is Journalism.

3. Engineering : Coder → Coder is a person whose profession is Engineering.

4. Architecture : Building → Architecture is a profession and Architect is a person who plans, design and reviews the construction of buildings.

Hence, Architecture : Building is the odd one.

RRB JE CBT 1 - Full Test 4 - Question 43

The value of  is

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 43

Formula to be used

(a – b)2 = a2 + b2 – 2ab

Given expression is


= 999 × 999 + 995

= (1000 – 1) (1000 – 1) + 995

= (1000 – 1)2 + 995

= 1000000 + 1 – 2 × 1000 × 1 + 995

= 998996.

RRB JE CBT 1 - Full Test 4 - Question 44

Choose the box that is similar to the box formed from the given sheet of paper (X).

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 44

Figure A → This box can only be folded in this way if we use the following configuration. But A is possible.
 


Figure B → If you consider the dotted side to be at the top, then the non-adjacent blank side will be at the bottom. And the two adjacent blank sides will form sides adjacent to the dotted side, but opposite to each other. As there are no other blank sides left, thus, figure B is not possible.

Figure C → Possible with the following configuration.

Figure D → From the figure above, we can clearly see that the two shaded sides can never be adjacent. This figure is thus not possible.

RRB JE CBT 1 - Full Test 4 - Question 45

The average of 100 items was found to be 30. If at the time of calculation, two terms were wrongly taken as 32 and 12 instead of 23 and 11, then the correct average is

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 45

the sum of 100 numbers = 30 × 100 = 3000

As 23 and 11 was added as 32 and 12

Therefore, actual sum = 3000 – 32 – 12 + 23 + 11 = 2990

correct mean = 2990/100 = 29.90

RRB JE CBT 1 - Full Test 4 - Question 46

A man's annual income has increased by Rs 5 lakhs but the tax on income that he has to pay has reduced from 12% to 10%. He now pays Rs 10,000 more income tax. What is his increased income (in Rs lakhs)?

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 46

Let the income before increment = Rs. x so increased income = Rs. (x + 500000) lakhs

According to given condition;

0.1(x + 500000) – 0.12x = 10000

⇒ 0.02x = 40000

⇒ x = 2000000 = Rs. 20 lakhs

∴ Increased income = 20 + 5 = 25 lakhs

RRB JE CBT 1 - Full Test 4 - Question 47

A statement followed by two conclusions have been given. Find which of the following options are correct.

Statement: Industrial Revolution which first of all started in Europe has brought about the modern age.

Conclusions:
I. Inequality between the rich and the poor results in revolution.
II. Revolution revamps the sodality.

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 47

The statement clearly states that the Industrial revolution has brought the modern age. That means it has brought changes in society but we cannot conclude from the given statement that revolution revamps the sodality. Hence, conclusion II doesn't follow. Also, it is not given that inequality between rich and poor resulted in revolution thus conclusion I doesn’t follow.

Thus option 3 is correct.

Note: a confraternity or association, especially a Roman Catholic religious guild or brotherhood.

RRB JE CBT 1 - Full Test 4 - Question 48

A sum of Rs 15525 is divided among Sunil, Anil and Jamil such that if Rs 22, Rs 35 and Rs 48 be diminished from their shares respectively, their remaining sums shall be in the ratio 7 ∶ 10 ∶ 13. What would have been the ratio of their sums if Rs 16, Rs 77 and Rs 37 respectively were added to their original shares?

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 48

Let the share of Sunil, Anil and jamil be x, y and z respectively.

Hence, x + y + z = 15525

22, 35 and 48 are diminished from the shares of x, y and z respectively

∴ Their share now is (x – 22),(y – 35) and (z – 48)

Total share = x + y + z – 22 – 35 – 48 = 15525 – 105 = 15420

It is given that from this total diminished share ratio of shares of Sunil, anil and Jamil is 7 ∶ 10 ∶ 13.

∴ Share of Sunil = 7/(7 + 10 + 13) × 15420 = 3598

∴ Share of Anil = 5140

And share of Jamil = 6682

∴ The original share for

Sunil is∶ x = 3598 + 22 = 3620

Anil is∶ y = 5140 + 35 = 5175

Jamil is∶ z = 6682 + 48 = 6730

Now 16, 77 and 37 is added respectively to x, y and z

Hence the new ratio = (3620 + 16) ∶ (5175 + 77) ∶ (6730 + 37) = 3636 ∶ 5252 ∶ 6767

∴ New ratio = 3636/101 ∶ 5252/101 ∶ 6767/101 = 36 ∶ 52 ∶ 67

RRB JE CBT 1 - Full Test 4 - Question 49

The hydraulic press works on the principle of ________.

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 49
  • Hydraulic press works on the principle of Pascal’s law. In fluid mechanics, Pascal's Law states that the pressure has infinite direction at a point, and thus the change in pressure at any point in any confined incompressible fluid is transmitted throughout it in such a way that the same change happens everywhere. 
  • The Hydraulic jack is used in packing press, metal press work, pushing and drawing rods, and more.
RRB JE CBT 1 - Full Test 4 - Question 50

From the given answer figure, select the one in which the question figure is hidden/embedded.

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 50

The question figure is hidden/embedded in this figure:


Therefore, image of option (3) is correct answer. 

RRB JE CBT 1 - Full Test 4 - Question 51

Which plant hormone causes Plant to bend towards the sun?

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 51
  • The  Plant hormone Auxin causes the plant to bend towards the sunlight.
  • It is a growth stimulant in plants.
  • Auxin is broken down on the sunnier side of the plant.
  • This causes the cells on the shadier side to grow more which in turn causes the bending of the plant towards sunlight.
RRB JE CBT 1 - Full Test 4 - Question 52

Where is the pituitary gland located?

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 52
  • The pituitary gland is a gland which is located at the base of the brain, right behind the bridge of the nose.
  • It is a small, hormone-producing gland(endocrine) whose secretions are essential for everyday living.
  • It is also known as the master gland as its secretions stimulate other glands.
RRB JE CBT 1 - Full Test 4 - Question 53

From the given words, select the word which cannot be formed using the letters of the given word.
NOMENCLATURE

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 53

There is only one R in NOMENCLATURE but Creature requires two R's.

Thus, 'Creature' cannot be formed.

RRB JE CBT 1 - Full Test 4 - Question 54

The most serious environmental effect posed by hazardous wastes is

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 54
  • Hazardous waste is the waste that has serious threats to public health and environmental health.
  • The most serious environmental effect posed by the hazardous waste is contamination of groundwater.
  • Poisonous chemicals are often diluted with water and then washed into the soil and cause groundwater contamination which may result in serious health effects.
RRB JE CBT 1 - Full Test 4 - Question 55

First, eight even natural numbers are multiplied with the first 7 multiples of five. Find out the number of zeroes at the end of the product.

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 55

First eight even natural numbers are 2, 4, 6, 8, 10, 12, 14, 16

First seven multiples of five are 5, 10, 15, 20, 25, 30, 35

Thus, 2 × 4 × 6 × 8 × 10 × 12 × 14 × 16 × 5 × 10 × 15 × 20 × 25 × 30 × 35

= 219 × 33 × 59 × 72

We will get a zero when 2 × 5 is a factor,

Number of 2 × 5 factors = 9

Number of zeroes = 9 

RRB JE CBT 1 - Full Test 4 - Question 56

When the latitude of sun change from 30° to 60° then the shadow of pole decrease by 15 meters. What is the height of the pole (in meter)?

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 56


In ΔABC

RRB JE CBT 1 - Full Test 4 - Question 57

The rates of simple interest in two banks. A and B are in the ratio 5 : 4. A person wants to deposit his total savings in two banks in such a way that he received equal half-yearly interest from both. He should deposit the saving in banks A and B in the ratio.

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 57

Let the savings in the banks A and B be x and y respectively

∴ According to the given conditions,

⇒ (x × 0.5 × r1) = (y × 0.5 × r2)

∴xy=r2r1=45∴xy=r2r1=45


∴ The person should invest amounts in the ratio of 4 ∶ 5 in the banks A and B respectively

RRB JE CBT 1 - Full Test 4 - Question 58

In a nuclear reactor, ‘cadmium rods’ are used as which of the following?

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 58
  • A nuclear reactor produces and controls the release of energy from splitting the atoms of certain elements. In a nuclear power reactor, the energy released is used as heat to make steam to generate electricity. Hence, controller is the correct answer.
  • FUEL: Uranium is the basic fuel. Usually pellets of uranium oxide (UO2) are arranged in tubes to form fuel rods. The rods are arranged into fuel assemblies in the reactor core.
  • Moderator: Material in the core which slows down the neutrons released from fission so that they cause more fission. It is usually water, but may be heavy water or graphite.
  • Controller: These are made with neutron-absorbing material such as cadmium, hafnium or boron, and are inserted or withdrawn from the core to control the rate of reaction, or to halt it.
  • Lubricant: lubricant have shown that it is possible to produce materials capable of lubricating some reactor components. In order to further the development of such lubricants the U.K.A.E.A. and the nuclear manufacturing groups have co-operated in providing lubricant manufacturers.
RRB JE CBT 1 - Full Test 4 - Question 59

Three of the four number-pairs in the alternatives have numbers which hold the same relationship as the numbers in the number-pair given below. Find the odd one out.
18 : 108

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 59

Here the logic is as follows,

18 : 108 → 18 ÷ 3 = 6, 18 × 6 = 108

Same logic is followed in,

15 : 75 → 15 ÷ 3 = 5, 15 × 5 = 75

21 : 147 → 21 ÷ 3 = 7, 21 × 7 = 147

9 : 27 → 9 ÷ 3 = 3, 9 × 3 = 27

7 : 45 → 7 is not divisible by 3

Thus pair 7 : 45 is not same as the given pair.

RRB JE CBT 1 - Full Test 4 - Question 60

In the following question, select the number which can be placed at the sign of question mark (?) from the given alternatives.

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 60

Sum of surrounding number = product of digits of central number

5 + 6 + 7 + 9 = 9 × 3 = 27

8 + 9 + 7 + 6 = 6 × 5 = 30

Similarly,

x + 3 + 6 + 5 = 6 × 3 = 18

⇒ × + 14 = 18

⇒ × = 4

Hence, missing number is 4.

RRB JE CBT 1 - Full Test 4 - Question 61

In the following question, select the related word from the given alternatives.
Genial : Cordial : : Acquiesce : ?

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 61

As ‘Genial’ and ‘Cordial’ are synonyms which mean friendly.

Similarly, ‘Acquiesce’ means 'Accept'.

Hence, the answer is ‘Accept’.

RRB JE CBT 1 - Full Test 4 - Question 62

In a class of 35 students and 6 teachers, each student got chocolates that are 20% of the total number of students and each teacher got chocolates that are 40% of the number of students. Find the number of total chocolates.

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 62

Given that,

Total number of students = 35,

Total number of teachers = 6.

Number of chocolates got by each student = 35 × (20/100) = 7

Number of chocolates got by each teacher = 35 × (40/100) = 14

Total number of chocolates got by all the students = 35 × 7 = 245

Total number of chocolates got by all the teachers = 6 × 14 = 84

∴ Total number of chocolates there = 245 + 84 = 329

RRB JE CBT 1 - Full Test 4 - Question 63

What will be the value of a3 + b3, if a2 + b2 = 32 and a + b = 8

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 63

(a + b)2 = a2 + b+ 2ab

⇒ (8)2 = 32 + 2ab

⇒ 2ab = 64 – 32 = 32

⇒ ab = 16

∴ a3 + b3 = (a + b) (a2 + b– ab) = (8) × (32 – 16) = 8 × 16 = 128

RRB JE CBT 1 - Full Test 4 - Question 64

Which country has withdrawn from UN-backed anti-corruption commission?

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 64

Guatemala has said it is withdrawing from a UN-backed anti-corruption commission. President Jimmy Morales accused the International Commission Against Impunity in Guatemala, commonly known as CICIG, of polarising the country and putting its security at risk.

RRB JE CBT 1 - Full Test 4 - Question 65

Which vitamin is made at a higher rate in our body?

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 65
  • Vitamin D3 (cholecalciferol) is synthesized in the human skin from 7-dehydrocholesterol upon exposure to ultraviolet-B (UVB) radiation from sunlight,
  • Thus large amounts of the vitamin can be produced when the body is exposed to sunlight for long time.
RRB JE CBT 1 - Full Test 4 - Question 66

N guavas are distributed among 10 boys. The same no. of guavas are distributed among 13 boys. The same exercise is done with 52 boys. What should be the minimum value of N required to distribute, so that no guava is left?

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 66

The minimum no. of guavas required is the LCM of 10, 13 and 52.

10 = 2 × 5

13 = 1 × 13

52 = 2 × 2 × 13

LCM of 10, 13 and 52 = 2 × 13 × 2 × 5 = 260

RRB JE CBT 1 - Full Test 4 - Question 67

If x3 + 5x2 – kx + 6 is divided by (x - 2), the remainder is 0. The value of k is equal to

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 67

 When x3 + 5x2 – kx + 6  is divided by (x - 2) remainder is 0 

⇒ x = 2 is root of the equation 

Put x = 2 

23 + 5.22 - 2k + 6 = 0

k = 17

RRB JE CBT 1 - Full Test 4 - Question 68

Which of the following state has a maximum number of International Airports?

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 68
  • Kerala has maximum 4 international Airports. Kannur International Airport, Cochin International Airport, Kozhikode International Airport and Trivandrum International Airport
RRB JE CBT 1 - Full Test 4 - Question 69

If x2 + 4y2 + z2 - 4x - 2z + 5 = 0, then find the value of y15+x5z14y15+x5z14.

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 69

x2 + 4y2 + z2 - 4x - 2z + 5 = 0

⇒ (x2 - 2 × x × 2 + 22) + (z2 - 2 × z × 1 + 12) + (2y)2 = 0

⇒ (x - 2)2 + (z - 1)2 + (2y)2 = 0

Now,

⇒ (x - 2) = 0, then x = 2

⇒ (z - 1)2 = 0, then z = 1

⇒ 2y = 0, then y = 0

RRB JE CBT 1 - Full Test 4 - Question 70

In the question below are given four statements followed by four conclusions numbered I, II, III and IV. You have to take the given statements to be true even if they seem to be at variance with commonly known facts. Read all the conclusions and then decide which of the given conclusions logically follows from the given statements disregarding commonly known facts.

Statements:
Some police stations are hospitals.
Some hospitals are schools.
All hospitals are banks.

Conclusions:
I. Some banks are schools
II. Some police stations are banks.
III. Hospitals which are schools are also banks.
IV. Schools which are banks are also hospitals.

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 70

The least possible Venn diagram for the given statements is as follows,

Conclusions:

I. Some banks are schools → It’s true.

II. Some police stations are banks → It’s true.

III. Hospitals which are schools are also banks → It’s true.

IV. Schools which are banks are also hospitals → It’s possible but not definite, hence false.

Thus only conclusion I, II and III follow.

RRB JE CBT 1 - Full Test 4 - Question 71

In the following question, select the odd letters from the given alternatives.

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 71

In VERSIL, ERWAT and MSICU, there are 2 vowels each but in NUREAT there are three vowels.

Thus 'NUREAT' are the odd letters.

RRB JE CBT 1 - Full Test 4 - Question 72

Poona Pact was signed in which of the following year?

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 72
  • The Poona Pact refers to an agreement between Dr. Bhimrao Ambedkar and Mahatma Gandhi signed on September 24, 1932.
  • This Pact ended the fast that Gandhi had undertaken in the jail to protest against British Prime Minister Ramsay Macdonald’s award of a separate electorate to the Depressed Classes.
RRB JE CBT 1 - Full Test 4 - Question 73

In a certain code language, '-' represents '×', '÷' represents '+', '+' represents '÷' and '×' represents '-'. Find out the answer to the following question.
38 ÷ 24 - 4 + 20 × 15 = ?

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 73


Given expression: 38 ÷ 24 - 4 + 20 × 15

After changing the symbols:

38 + 24 × 4 ÷ 20 – 15

= 38 + 24 × 0.2 – 15

= 38 + 4.8 – 15

= 27.8

Hence, 27.8 is the correct answer.

RRB JE CBT 1 - Full Test 4 - Question 74

The Supreme Court can issue writs under which Article(s) of the Constitution?

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 74
  • The Supreme Court can issue writs under Articles 32 and 139 of the Constitution.
  • The types of writs include Habeas Corpus, Mandamus, Prohibition, Certiorari and Quo warranto.

NOTE: Article 226 gives power to high courts to issue writs, not to the Supreme court 

RRB JE CBT 1 - Full Test 4 - Question 75

The world’s largest flying seabird is:

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 75

The largest living or flying bird by wingspan is the Wandering Albatross (Diomedea Exulans family) of the sub-Antarctic oceans.

• The maximum dimensions in this species are a length of 1.44 m (4.7 ft) and a wingspan of 3.65 m (12.0 ft).

• It was the first species of albatross to be described and was long considered the same species as the Tristan albatross and the Antipodean albatross.

RRB JE CBT 1 - Full Test 4 - Question 76

Directions: The following table gives zone wise survey report of the people of a country who take coffee. Study the table and answer the questions.

Q. The percentage of people in the south zone who take coffee at least once a day is close to

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 76

Total Number of people of south zone = 1450 + 1120 + 420 + 350 + 50

=3390

Number of people of south zone who take coffee at least once a day = Total number of people of the south zone - people who never take coffee

= 3390 - 50 = 3340

The percentage of people of south zone who take coffee at least once a day=

= 98.52%

RRB JE CBT 1 - Full Test 4 - Question 77

The relative density of a substance is the __________.

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 77

The relative density of a substance is the Ratio of its density to the density of water.

  • A substance with a relative density less than 1 will float in water. For example, an ice cube, with a relative density of about 0.91, will float. A substance with a relative density greater than 1 will sink.
  • If a substance's relative density is less than one then it is less dense than the reference; if greater than 1 then it is denser than the reference(here water)
  • If the relative density is exactly 1 then the densities are equal; that is, equal volumes of the two substances have the same mass.
RRB JE CBT 1 - Full Test 4 - Question 78

Which of the following causes of acid rain?

I. SO2
II. NO2
III. CO2

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 78
  • Acid rain results when sulfur dioxide (SO2) and nitrogen oxides (NO2) are emitted into the atmosphere
  • Acid rain is a rain or any other form of precipitation that is unusually acidic, meaning that it has elevated levels of hydrogen ions. It can have harmful effects on plants, aquatic animals and infrastructure. 
RRB JE CBT 1 - Full Test 4 - Question 79

Who among the following has won the Mohammed Rafi Award 2018?

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 79
  • The 'Mohammed Rafi Award 2018' was given to late music composer Laxmikant Shantaram Kudalkar and playback singer Usha Timothy.
  • Laxmikant was given the Mohammed Rafi Lifetime Achievement Award consisting of 1 lakh rupees and a trophy.
  • Usha Timothy was honoured with the award and 51,000 rupees.
  • The awards were instituted by the NGO Spandan Arts.
RRB JE CBT 1 - Full Test 4 - Question 80

If the price of a commodity is increased by 40% by what fraction must its consumption reduced so as to keep the same expenditure on its consumption?

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 80

Let the price of the commodity be Rs. 100/kg.

The price of a commodity is increased by 40%.

So, the new piece the commodity = Rs. 140/kg

Let we could get x kg of the commodity initially for a certain amount of money and after increment of the price, we will get y kg of the commodity for the same amount of money.

So, we can write now,

x × 100 = y × 140

⇒ y/x = 5/7

So, we can see that for the same amount of money we will get 2 kg less after increment in price where previously we used to get 7 kg.

∴ The required consumption reduced so as to keep the same expenditure on its consumption

= 2/7.

RRB JE CBT 1 - Full Test 4 - Question 81

9 oranges cost as much as 5 apples, 5 apple cost as much as 3 mangoes, 4 mangoes cost as much as 9 plantains; if 3 plantains cost Rs. 2.40, what will an orange cost?

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 81

∵ 9 oranges cost as much as 5 apples

⇒ 9O = 5A ... (i)

∵ 5 apples cost as much as 3 mangoes

⇒ 5A = 3M ... (ii)

∵ 4 mangoes cost as much as 9 plantains

⇒ 4M = 9P

⇒ 3M = (9/4) × 3 × P ... (iii)

Combining Equations (i), (ii), (iii)

⇒ 9O = 5A = 3M = (9/4) × 3 × P

⇒ 9O = (9/4) × 3 × P

⇒ O = (1/4) × 3 × P

For, 3 × P = Rs 2.40

⇒ O = 2.4 / 4 = Rs 0.6 = 60 paise

RRB JE CBT 1 - Full Test 4 - Question 82

In the following question, select the missing term from the given alternatives.
8, 6, 2, 96, ?, 8, 5, 120, 6, 3, 7, ?

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 82

The logic here is as follows,

8 × 6 × 2 = 96,

3 × 8 × 5 = 120,

6 × 3 × 7 = 126

Thus the missing number are 3 and 126.

RRB JE CBT 1 - Full Test 4 - Question 83

Which of the following cities is known as "City of Lakes," the "Venice of the East," or the "Kashmir of Rajasthan?

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 83

Udaipur is the city which is called the ‘City of Lakes’, ‘Venice of the East’ and ‘Kashmir of Rajasthan’. This is because of the many lakes are there in the city which add to the beauty of Udaipur.

RRB JE CBT 1 - Full Test 4 - Question 84

A tank can be filled using pipe A and emptied using pipe B. Pipe B can empty the tank in 12 hrs. When both the pipes are simultaneously opened, the tank is half full in 2 hrs. In how much time can pipe A fill the tank alone?

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 84

Let pipe A can fill the tank in ‘x’ hours

A’s 1 hr. work = 1/x

B’s 1 hr. work = 1/12

When both are opened simultaneously, work done in 2 hours,

⇒ (1/x – 1/12) × 2 = 1/2

⇒ (1/x – 1/12) = 1/4

⇒ 1/x = 1/4 + 1/12

⇒ 1/x = 1/3

⇒ x = 3 hrs.

∴ Pipe A can fill the tank alone in 3 hours

RRB JE CBT 1 - Full Test 4 - Question 85

Who invented the revolver?

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 85
  • Samuel Colt was an American industrialist and businessman who is credited with the invention of the revolver.
  • Edward Jenner was a British physician who is credited with the discovery of the smallpox vaccine.
  • Alexander Fleming is a Scottish physician and microbiologist who is credited with the discovery of penicillin.
  • Albert Einstein was a German-born physicist who is known for his theory of relativity.
RRB JE CBT 1 - Full Test 4 - Question 86

From point P, at 6:30 pm, a train starts moving towards Q with a speed of 40 km/hr. Another train starts moving from point Q at 7:30 p.m. towards point P at the speed of 60 km/hr. Both of them meet at 11:30 p.m. at point R. What is the ratio of PR and QR?

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 86

Let train A with 40 km/hr speed starts from point P, moving towards point Q

And train B with 60 km/hr speed stars from point Q, moving towards point P.

Time taken by train A to reach at point R = 5 hr

And time taken by train B to reach at point R = 4 hr

Distance covered by train A to reach at point R = 5 × 40 = 200

And distance covered by train B to reach at point R = 4 × 60 = 240

Thus, PR = 200 km & QR = 240 km

∴ PR : QR = 200 : 240 = 5 : 6

RRB JE CBT 1 - Full Test 4 - Question 87

In a certain code language, ‘ADVOCATE’ is coded as ‘SAXGSZOV’. How is ‘AMENABLE’ written in that language?

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 87

The pattern for the code is as follows,


Similarly,

Hence, AMENABLE will be coded as BJXERZGW.

RRB JE CBT 1 - Full Test 4 - Question 88

To which state is the Kangra school of painting related?

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 88
  • Kangra School of Painting is pictorial art of Kangra in Himachal Pradesh.
  • The focal theme of the paintings is the erotic sentiment.
  • The contemporary life and society have been portrayed in such paintings. 
RRB JE CBT 1 - Full Test 4 - Question 89

Directions: These questions are based on the information given below:

Amita, Bawa, Carol, Daksha, Elex and Fanny are six members of a family. Amita is the mother of Bawa, who is the husband of Daksha. Fanny is the brother of one of the parents of Carol. Daksha is the daughter - in - law of Elex and has no siblings. Carol is the son of Daksha.

Q. How is Amita related to Fanny?

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 89

From the given information,


1) Amita is the mother of Bawa, who is the husband of Daksha.

2) Daksha is the daughter - in - law of Elex and has no siblings.

It implies Elex is the father of Bawa and husband of Amita.

3) Carol is the son of Daksha.

4) Fanny is the brother of one of the parents of Carol.

It implies Fanny is the brother of Bawa as Daksha has no siblings.

Hence, Amita is mother of Fanny.

RRB JE CBT 1 - Full Test 4 - Question 90

Directions: These questions are based on the information given below:

Amita, Bawa, Carol, Daksha, Elex and Fanny are six members of a family. Amita is the mother of Bawa, who is the husband of Daksha. Fanny is the brother of one of the parents of Carol. Daksha is the daughter - in - law of Elex and has no siblings. Carol is the son of Daksha.

Q. How is Carol related to Elex?

Detailed Solution for RRB JE CBT 1 - Full Test 4 - Question 90

From the given information,


1) Amita is the mother of Bawa, who is the husband of Daksha.

2) Daksha is the daughter - in - law of Elex and has no siblings.

It implies Elex is the father of Bawa and husband of Amita.

3) Carol is the son of Daksha.

4) Fanny is the brother of one of the parents of Carol.

It implies Fanny is the brother of Bawa as Daksha has no siblings.
Hence, Carol is grandson of Elex.

RRB JE CBT 1 - Full Test 4 - Question 91

What is the process of wastewater treatment is commonly known?