RRB Group D Mock Test - 21


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100 Questions MCQ Test RRB (Group D) - Mock Tests & Previous Year Papers | RRB Group D Mock Test - 21

RRB Group D Mock Test - 21 for Railways 2023 is part of RRB (Group D) - Mock Tests & Previous Year Papers preparation. The RRB Group D Mock Test - 21 questions and answers have been prepared according to the Railways exam syllabus.The RRB Group D Mock Test - 21 MCQs are made for Railways 2023 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for RRB Group D Mock Test - 21 below.
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RRB Group D Mock Test - 21 - Question 1

Who administers oath to the President of India?

Detailed Solution for RRB Group D Mock Test - 21 - Question 1

Honourable Chief justice of India (CJI) administers the oath to the president of India, in case CJI is not available the senior most judge administers Oath to the president.

RRB Group D Mock Test - 21 - Question 2

Find the least number which when divided by 12, 18, 36 and 45 leaves the remainder 8, 14, 32 and 41 respectively.

RRB Group D Mock Test - 21 - Question 3

In the following question, select the related number from the given alternatives.APPLE: 50 :: ORANGE: ?

RRB Group D Mock Test - 21 - Question 4

The H.C.F and L.C.M of two numbers are 8 and 48 respectively. If one of the numbers is 24, then other number is:

RRB Group D Mock Test - 21 - Question 5

Who invented microphone?

RRB Group D Mock Test - 21 - Question 6

John Logie Baird invented which of the following items?

RRB Group D Mock Test - 21 - Question 7

Which of the following festivals is celebrated in the month of January?

RRB Group D Mock Test - 21 - Question 8

Forecast the Growth Rate for the year 1995 from the following data:

Detailed Solution for RRB Group D Mock Test - 21 - Question 8

In the growth rate the pattern followed is:

3.5 + 0.2 = 3.7

3.7 + 0.2 × 2 = 3.7 + 0.4 = 4.1

4.1 + 0.4 × 2 = 4.1 + 0.8 = 4.9

4.9 + 0.8 × 2 = 4.9 + 1.6 = 6.5

Now, 6.5 + 1.6 × 2 = 6.5 + 3.2 = 9.7

Thus 9.7 is the answer.

RRB Group D Mock Test - 21 - Question 9

Directions: In the following question, a series is given, with one term missing. Choose the correct alternative from the given ones that will complete the series.reoc, pgme, nikg, lkii, ?

Detailed Solution for RRB Group D Mock Test - 21 - Question 9

The pattern followed is as follows:

Thus jmgk is the answer.

RRB Group D Mock Test - 21 - Question 10

What is the full form of CNS?

Detailed Solution for RRB Group D Mock Test - 21 - Question 10

CNS is the complex of nerve tissues that controls the activities of the body. In vertebrates it comprises the brain and spinal cord.

RRB Group D Mock Test - 21 - Question 11

Choose the correct alternative from the given ones that will complete the series.AYD, BVF, DRH,?, KGL

Detailed Solution for RRB Group D Mock Test - 21 - Question 11

The pattern is as follows:

Clearly, GMJ the missing term.

RRB Group D Mock Test - 21 - Question 12

Find the wrong number in the sequence :196, 169, 144, 121, 101

Detailed Solution for RRB Group D Mock Test - 21 - Question 12

All are squares of a number except 101.

196 = 142

169 = 132

144 = 122

121 = 112

RRB Group D Mock Test - 21 - Question 13

When is the earth at the largest distance from the sun (Aphelion)?

Detailed Solution for RRB Group D Mock Test - 21 - Question 13

The earth is at the largest distance from the sun (Aphelion point) on the 4th of July.

RRB Group D Mock Test - 21 - Question 14

Which right was described as the heart and soul of the Indian Constitution by the Architect of the Constituent Assembly, Dr. B R Ambedkar?

Detailed Solution for RRB Group D Mock Test - 21 - Question 14

According to Dr. BR Ambedkar, Right to Constitutional remedies is the heart and soul of the Indian Constitution.

RRB Group D Mock Test - 21 - Question 15

The National Song of India was written by whom?

Detailed Solution for RRB Group D Mock Test - 21 - Question 15

The National song of India, ‘Vande Matram’ was written by Bankim Chandra Chatterjee.  
The National anthem, 'Jana Gana Man' was written by 'Rabindranath Tagore'.

RRB Group D Mock Test - 21 - Question 16

Operation Blue Star is related to which of the following?

Detailed Solution for RRB Group D Mock Test - 21 - Question 16

Operation Blue Star was an Indian military operation which occurred between 3 June and 8 June 1984, ordered by Prime Minister Indira Gandhi in order to establish control over the Harmandir Sahib Complex.

RRB Group D Mock Test - 21 - Question 17

Which of the following planets observes the shortest day?

Detailed Solution for RRB Group D Mock Test - 21 - Question 17

The planet Jupiter has the shortest day of all the eight major planets in the Solar System. It spins around on its axis once every 9 hr 55 min 29.69 sec.

RRB Group D Mock Test - 21 - Question 18

Which of the following substances lacks in a diabetic patient?

Detailed Solution for RRB Group D Mock Test - 21 - Question 18

Insulin is a hormone made by the pancreas that allows our body to use sugar from carbohydrates. It also helps to keep our blood sugar level from getting too high

RRB Group D Mock Test - 21 - Question 19

In a row of 10 boys, when Ram was shifted by 5 places towards the left, he became the 3rd from the left end. What was his earlier position from the right end of the row?

Detailed Solution for RRB Group D Mock Test - 21 - Question 19

When Ram is shifted to 5 places towards left he became 3rd from left end. Then his earlier

Position will be  3 + 5= 8th from the left which will be 3rd from the right end.

RRB Group D Mock Test - 21 - Question 20

In question some statements are given, followed by two conclusions I and II. You have to consider the statements to be true, even if they seem to be at variance from commonly known facts. You have to decide which of the given conclusions, if any follow from the given statements. Indicate your answer.Statements:
I. No sofas is chairsII.
All sofas are tables
III. No tables are mats
Conclusions:
I. No mats are sofas
II. All chairs can possibly be tables

Detailed Solution for RRB Group D Mock Test - 21 - Question 20

Minimum possible venn diagram can be describe as below:

 

I. No mats are sofas = clearly follows.

II. All chairs can possibly be tables = its possible, hence true( Possibility shown below.)

RRB Group D Mock Test - 21 - Question 21

The difference between the greatest and least prime numbers which are less than 100 is

Detailed Solution for RRB Group D Mock Test - 21 - Question 21

The greatest prime number less than 100 is 97. The least prime number is 2.

Difference = 97 – 2 = 95

RRB Group D Mock Test - 21 - Question 22

Directions: In the following question, select the related word from the given alternatives.West : North – East ∷ South : ?

Detailed Solution for RRB Group D Mock Test - 21 - Question 22


Similarly, if we rotate direction indicator through 1350 in clockwise direction then pointer indicating South would show North – West direction.

RRB Group D Mock Test - 21 - Question 23

Two pipes can fill a tank in 10 hours and 12 hours respectively, while a third pipe empties the full tank in 20 hours. If all the three pipes operate simultaneously, in how much time the tank will be filled?

Detailed Solution for RRB Group D Mock Test - 21 - Question 23

Time taken by A , B and C to fill/empty the tank completely = 10 , 12 and 20 hours respectively

Hence part of tank filled by A, B and emptied by C in 1 hour = 1/10, 1/12 and 1/20 respectively

Part of tank filled by all 3 pipes in 1 min =1/10+1/12−1/20=1/10+1/12−1/20

=660+560−360=660+560−360

=860=860

= 2/15

Hence it will take 15/2 hours ie 7 hours and 30 mins to completely fill the tank

RRB Group D Mock Test - 21 - Question 24

What is related to ‘Sympathy’ in the same way as ‘Virtue’ is related to ‘Vice’?

Detailed Solution for RRB Group D Mock Test - 21 - Question 24

Vice is antonym of Virtue.

Similarly,

Sympathy is antonym of Cruelty.

RRB Group D Mock Test - 21 - Question 25

Among the following states, the literacy rate is highest in

Detailed Solution for RRB Group D Mock Test - 21 - Question 25

Mizoram is the second most literate state in all of India (88%), second only to Kerala, with Serchhip and Aizawl districts being the two most literate districts in India (literacy rate is 98.76% and 98.50%),both in Mizoram. 

RRB Group D Mock Test - 21 - Question 26

In a group of 50 students, 25 play Hockey, 30 play Football, and 8 play neither game. What is the number of students who play both Hockey and Football?

Detailed Solution for RRB Group D Mock Test - 21 - Question 26

Total students = 50

Student who play hockey = 25

Student who play football = 30

Students who play neither football nor hockey = 8

Total students = (Student who play hockey) + (Students who play football) – (Students who play both hockey and football) + (Students who neither play hockey nor football)

50 = 25 + 30 – (Students who play both hockey and football) + 8

Students who play both hockey and football = 13

So, total 13 students play both hockey and football.

RRB Group D Mock Test - 21 - Question 27

Which number indicates Doctors who are not Engineers but  Good speakers?A → Engineers   B → Good speakersC → Doctors

Detailed Solution for RRB Group D Mock Test - 21 - Question 27

Here, According to the Venn diagram,

Doctors who are not  Engineers but Good speakers = 6.

RRB Group D Mock Test - 21 - Question 28

Instead of dividing Rs. 234 among A, B, C in the ratio 1/3:1/4:1/2, by mistake it was divided in the ratio 3 : 4 : 2. Who gained in the transaction?

 

Detailed Solution for RRB Group D Mock Test - 21 - Question 28


Actual amount they have to got -

But mistakenly they got the amount in the ratio = 3 : 4 : 2

Hence, A and B gained in the transaction.

RRB Group D Mock Test - 21 - Question 29

A series is given, with one term missing. Choose amongst the given responses choose the meaningful one.208, 225, 259, 310, ?, 463

Detailed Solution for RRB Group D Mock Test - 21 - Question 29

208, 225, 259, 310, ?, 463

225 – 208= 17

259 – 225= 34

310 – 259= 51

The value increases in multiples of 17.

The next number will be increased by 68, 310 + 68 = 37

Hence the correct option is 378

RRB Group D Mock Test - 21 - Question 30

Which river used to be called the ‘Sorrow of Bengal’?

Detailed Solution for RRB Group D Mock Test - 21 - Question 30

Damodar river runs from west to east and,in the narrow bottleneck at Asansol,it emerges on the deltaic plains of Bengal. It was known as sorrow of Bengal because of its destructive floods in the pains of West Bengal. Now , Damodar and its tributaries have been tamed with several dams.

RRB Group D Mock Test - 21 - Question 31

Two numbers A and B are 22% and 34% less then a third number C. Find by what percentage is the number B less than the number A?

Detailed Solution for RRB Group D Mock Test - 21 - Question 31

A = C – 0.22C = 0.78C

B = C – 0.34C = 0.66C

∴ Required % = ((0.78C – 0.66C)/0.78C) × 100 = 15.3 ≈ 15%

∴ B is less than A by 15%

RRB Group D Mock Test - 21 - Question 32

'Yug Purush, Bharat Ratna, Atal ji' has been written by _______.

Detailed Solution for RRB Group D Mock Test - 21 - Question 32

Former Uttarakhand chief minister Ramesh Pokhriyal has unveiled 'Yug Purush, Bharat Ratna, Atal ji' which chronicles the life of former Prime Minister Atal Bihari Vajpayee. The book was presented to President Pranab Mukherjee. The book is 450 pages long and will be launched soon.

RRB Group D Mock Test - 21 - Question 33

Find the missing term in diagram shown below?

 

Detailed Solution for RRB Group D Mock Test - 21 - Question 33

Putting A = 1, B = 2, C = 3, D = 4, ....., X = 24, Y = 25, Z = 26,

we have since K = 11,

so value corresponding to missing letter = (27 – 11) = 16.

So, the missing letter is the 16th letter of the English alphabet, which is P.

RRB Group D Mock Test - 21 - Question 34

A and B together can complete a work in 24 days. B alone does 1/3rd part of this work in 12 days. How many days will A alone take to complete the remaining work?

Detailed Solution for RRB Group D Mock Test - 21 - Question 34

Work done by B in one day = (1/3)/12 = 1/36

Work done by both A and B in one day = 1/24

Work done by A in one day = (1/24) – (1/36) = 1/72

Time taken by A alone to complete the work = 1/(1/72) = 72 days

∴ Time taken by A alone to complete the work = 72 days

Remaining work = 1 - 1/3 = 2/3

A alone take to complete the remaining work = 72 × (2/3) = 48 days

RRB Group D Mock Test - 21 - Question 35

Rahul told Anand, “Yesterday I defeated the only brother of the daughter of my grandmother” Whom did Rahul defeat?

Detailed Solution for RRB Group D Mock Test - 21 - Question 35


RRB Group D Mock Test - 21 - Question 36

Directions: In the following question, select the one which is different from the other three responses.

Detailed Solution for RRB Group D Mock Test - 21 - Question 36

Cubic inch per second, cubic feet per second and cubic meter per second are units of a flow rate whereas cubic grams per second is not a unit of flow rate.

RRB Group D Mock Test - 21 - Question 37

In the following question, select the one which is different from the other three responses.

Detailed Solution for RRB Group D Mock Test - 21 - Question 37


Hence, QPO is different from the other three responses.

RRB Group D Mock Test - 21 - Question 38

Which of the following is a legal right?

Detailed Solution for RRB Group D Mock Test - 21 - Question 38

In the year 1977, the 44th amendment eliminated the right to acquire, hold and dispose of property as a fundamental right. However, in another part of the Constitution, Article 300 (A) was inserted to affirm that no person shall be deprived of his property save by authority of law. The result is that the right to property as a fundamental right is now substituted as a statutory law.

RRB Group D Mock Test - 21 - Question 39

From the given alternatives, select the word which can be formed using the letters of the given word.JRISPRUDENCE

Detailed Solution for RRB Group D Mock Test - 21 - Question 39

Let’s check each word,

A. PRESIDENT → T is not present in given word

B. JUDGE → G is not present in given word

C. PRIME → M is not present in given word

D. PREJUDICE → Can be formed

Hence PREJUDICE can be formed from the given word JRISPRUDENCE.

RRB Group D Mock Test - 21 - Question 40

Read the given statements carefully and answer the question.Statement: Though the school bags policy has been announced, it is not clear how many schools are following it. The state Government is also clueless whether schools have implemented the rules. Which of the following is true according to the given statement?

Detailed Solution for RRB Group D Mock Test - 21 - Question 40

A. School bags policy has been implemented by the Government.Since the government is clueless about the implementation, it is false.

B. Schools are not interested in following the rules.This is not mentioned anywhere in the given information.

C. There is no monitoring system.

Since the government does not know how many schools have implemented or not, there is no monitoring system. Therefore it is true.

D. State Government is not interested in follow-up.

This is not mentioned anywhere in the given information.

RRB Group D Mock Test - 21 - Question 41

The cost of Type 1 material is Rs. 15 per kg and Type 2 material is Rs. 20 per kg. If both Type 1 and Type 2 are mixed in the ratio of 2 : 3, then what is the price per kg of the mixed variety of material?

Detailed Solution for RRB Group D Mock Test - 21 - Question 41

⇒ Cost Price (C.P) of Type 1 material is Rs. 15 per kg

⇒ C.P of Type 2 material is Rs. 20 per kg

⇒ Type 1 and Type 2 are mixed in the ratio of 2 : 3 

⇒ C.P of the resultant mixture 

⇒ {(15 × 2) + (20 × 3)}/(2 + 3)

⇒ (30 + 60)/5 = 90/5

⇒ (30 + 60)/5 = 18

∴ Price per kg of the mixed variety of material = Rs.18

RRB Group D Mock Test - 21 - Question 42

The surface area of the three coterminous faces of a cuboid are 6, 15, 10 sq.cm respectively. Find the volume of the cuboid. 

Detailed Solution for RRB Group D Mock Test - 21 - Question 42

If l, b, h be the dimensions of the cuboid,

then volume of the cuboid = l x b x h 

⇒ l x b = 6

⇒ l x h = 15

⇒ b x h = 10

multiplying all the three equations we get :

⇒ l2 b2 h= 6 x 15 x 10

⇒ Volume = l x b x h

⇒ Volume =6x15x10−−−−−−−−−√=6x15x10

∴ Volume is 30

RRB Group D Mock Test - 21 - Question 43

Who won the 2017 Nobel Physics Prize?

Detailed Solution for RRB Group D Mock Test - 21 - Question 43

Rainer Weiss, Kip Thorne & Barry Barish were awarded Nobel Prize in Physics for decisive contributions to LIGO detector & observation of gravitational waves. Waves which were predicted by Einstein 100 yrs ago, came from a collision b/w 2 black holes & took 1.3 bn yrs for the waves to arrive at LIGO detector. LIGO is a collaborative project with over 1000 researchers from more than 20 countries

RRB Group D Mock Test - 21 - Question 44

A man travels 30 km at speed 10 km/h and next 40 km at 20 km/h and there after travel 60 km at 30 km/h. His average speed is

Detailed Solution for RRB Group D Mock Test - 21 - Question 44

As per the given data, we get

Time taken for the first 30 km = distance /speed = 30/10 = 3 hours

Time taken for the next 40 km = 40/20 = 2 hours

Time taken for the next 60 km = 60/30 = 2 hours

Total time = 3 + 2 + 2 = 7 hours

Total distance = 30 + 40 + 60 = 130 km

∴ Average speed = total distance/total time = 130/7 = 18.6 km/hr

RRB Group D Mock Test - 21 - Question 45

Who won the 2017 Best FIFA Men's Player award?

Detailed Solution for RRB Group D Mock Test - 21 - Question 45

Cristiano Ronaldo has caught up with Lionel Messi to become a five-time winner of FIFA’s best player award. The Real Madrid forward was crowned player of the year at the FIFA Best ceremony at the London Palladium theatre. Lieke Martens, who scored in the final win over Denmark, won the player’s award and Sarina Wiegman collected the coaching accolade.

RRB Group D Mock Test - 21 - Question 46

Abhinav Bindra won gold Medal for which Sport in Olympics?

Detailed Solution for RRB Group D Mock Test - 21 - Question 46

Abhinav Bindra is an Indian businessman and retired professional shooter who is a World and Olympic champion in the 10 m Air Rifle event.

RRB Group D Mock Test - 21 - Question 47

The Chief Minister is appointed by

Detailed Solution for RRB Group D Mock Test - 21 - Question 47

The Governor appoints and swears in the Chief Minister, whose council of ministers are collectively responsible to the assembly. 

RRB Group D Mock Test - 21 - Question 48

Which of the following city is famous as Holy city of Buddhist?

Detailed Solution for RRB Group D Mock Test - 21 - Question 48

Sanchi is a Buddhist complex, famous for its Great Stupa. The Great Stupa at Sanchi is one of the oldest stone structure in India and was originally commissioned by the emperor Ashoka in the 3rd century BCE. Its nucleus was a simple hemispherical brick structure built over the relics of the Buddha.

RRB Group D Mock Test - 21 - Question 49

In a certain code 'bir le nac' means 'green and tasty. 'pi nac hor' means 'tomato is green' and 'la bir hor' means 'food is tasty'. Which of the following means 'tomato is tasty' in that code?

Detailed Solution for RRB Group D Mock Test - 21 - Question 49


 

→ ‘tomato’ is coded as ‘pi’

→ ‘is’ is coded as ‘hor’

→ ‘tasty’ is coded as ‘bir’

Thus, the code for 'tomato is tasty' is ‘pi hor bir’.

RRB Group D Mock Test - 21 - Question 50

A company has six managers A, B, C, D, E and F. There are two managers managing the same department. F is in the sales department. D is in the HR department. B is not in the same department as F. E is in marketing while C is in finance.What is the department of B?

Detailed Solution for RRB Group D Mock Test - 21 - Question 50


 

Given information is not sufficient to answer the question. As the departments of A is not clear.

Hence, the answer is (4)

RRB Group D Mock Test - 21 - Question 51

If 1st January 2013 was Wednesday, then what day of the week was it on 2nd January 2014?

Detailed Solution for RRB Group D Mock Test - 21 - Question 51

On 1st Janurary, 2013 it was Wednesday.

Day between 1st January and 2nd January 2014 = 366

⇒ 367 = 364 + 3 = 364/7 + 3 = 52 weeks + 3 day.

On 2nd January 2014, it was Wednesday + 2 day = Friday.

RRB Group D Mock Test - 21 - Question 52

Six girls are sitting in a circle facing to the center of the circle. They are P, Q, R, S, T and V. T is not between Q and S but some other one. P is next to the left of V. R is 4th to the right of P.Which of the following statement is not true?

Detailed Solution for RRB Group D Mock Test - 21 - Question 52


R is not second but fourth to the left of T.

RRB Group D Mock Test - 21 - Question 53

______ has rolled out FASTag across India.

Detailed Solution for RRB Group D Mock Test - 21 - Question 53

Paytm Payments Bank is rolling out Paytm FASTag across the India, with the govt mandating the use of FASTag on every new vehicle sold from Dec 1.The FASTags allow vehicles to pass through 380 toll plazas across India covering 55,000 km without having to stop.Each Paytm FASTtag is linked to a registered Paytm account to facilitate instant automatic deduction of toll charges.

RRB Group D Mock Test - 21 - Question 54

Suraj walks 30 km towards North. He turns left and walks 60 km. He again turns left and walks 30 km. Finally, he moves 20 km after turning to the left. How far is he from his starting position?

Detailed Solution for RRB Group D Mock Test - 21 - Question 54


∴ Required Distance = 60 – 20 = 40 km

RRB Group D Mock Test - 21 - Question 55

Simplify:5 + (22 + 5) × 4 – (6 ÷ 2)

Detailed Solution for RRB Group D Mock Test - 21 - Question 55

 

Follow BODMAS rule to solve this question, as per the order given below,

Step - 1 - Parts of an equation enclosed in 'Brackets' must be solved first,

Step - 2 - Any mathematical 'Of' or 'Exponent' must be solved next,

Step - 3 - Next, the parts of the equation that contain 'Division' and 'Multiplication' are calculated,

Step - 4 - Last but not least, the parts of the equation that contain 'Addition' and 'Subtraction' should be calculated

⇒ 5 + (22 + 5) × 4 – (6 ÷ 2)

⇒ 5 + 9 × 4 – 3

⇒ 5 + 36 – 3

⇒ 41 – 3

∴ 5 + (22 + 5) × 4 – (6 ÷ 2) = 38

RRB Group D Mock Test - 21 - Question 56

Simplify the expression:(0.04 ×1 × 0.005 × 0.5)

Detailed Solution for RRB Group D Mock Test - 21 - Question 56

Computing,

4 × 11 × 5 × 5 = 1100

Sum of decimal places = 2 + 1 + 3 + 1 = 7

Hence,

(0.04 × 1.1 × 0.005 × 0.5)

= 0.0001100

= 0.00011

RRB Group D Mock Test - 21 - Question 57

Find the value of x in the given expression.17% of x = 66% of 128 – 31% of x

Detailed Solution for RRB Group D Mock Test - 21 - Question 57

17% of x = 66% of 128 – 31% of x

⇒ 0.17x = (0.66 × 128) – 0.31x

⇒ 0.17x + 0.31x = 84.48

⇒ 0.48x = 84.48

⇒ x = 84.48/0.48

⇒ x = 176

RRB Group D Mock Test - 21 - Question 58

A mirage is formed because of which of the following phenomenon?

Detailed Solution for RRB Group D Mock Test - 21 - Question 58

The mirage is formed because of Total Internal Reflection and refraction. It is a naturally occurring optical illusion in which light rays bend to produce a displaced image of distant objects or the sky.

RRB Group D Mock Test - 21 - Question 59

The average of 8 consecutive numbers is K. If next 4 numbers are also added, the average increased by

Detailed Solution for RRB Group D Mock Test - 21 - Question 59

If 8 numbers are 1, 2, 3, 4, 5, 6, 7, 8

The average of these numbers is

⇒ (1 + 2 + 3 + 4 + 5 + 6 + 7 + 8)/8 = 4.5

If next four numbers are added, then,

⇒ (1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10 + 11 + 12)/12 = 6.5

∴ The average is increased by 2

[Note: No matter which consecutive numbers we choose, the increase or decrease in average is same]

RRB Group D Mock Test - 21 - Question 60

The present age of Akhil and Vinay is 27 and 36 years respectively. After how many years from now, will the ratio of their ages be 4 : 5?

Detailed Solution for RRB Group D Mock Test - 21 - Question 60

Given the present ages of Akhil and Vinay are 27 and 36 years respectively

⇒ Let us consider after ‘x’ years the ratio of their ages will be 4 : 5

Their ages after ‘x’ years will be (27 + x) and (36 + x) years respectively

⇒ From the condition,

(27 + x)/(36 + x) = 4/5

⇒ (27 + x) × 5 = (36 + x) × 4

⇒ 135 + 5x = 144 + 4x

⇒ 5x – 4x = 144 – 135

⇒ x = 9 years

∴ The ratio of their ages will be in the ratio 4 : 5 after 9 years from the present ages

RRB Group D Mock Test - 21 - Question 61

A vessel contains liquids A and B in ratio 5 : 3. If 16 litres of the mixture are removed and the same quantity of liquid B is added the ratio becomes 3 : 5 What quantity does the vessel hold?

Detailed Solution for RRB Group D Mock Test - 21 - Question 61

 Suppose the vessel contains 5x litres and 3x litres of liquids A and B respectively.

The removed quantity contains = 16/(5 + 3) × 5 = 10litres of A and 16 - 10 = 6 litres of B

Now, (5x - 10) : (3x - 6 + 16) = 3 : 5

⇒ (5x - 10) / (3x + 10) = 3/5

⇒ 25x - 50 = 9x + 30

⇒ 16x = 80

⇒ x = 5

∴ Capacity of vessel = 8x = 8 × 5 = 40

RRB Group D Mock Test - 21 - Question 62

Simplify up to two decimal places 2.36 × 3.47 + 5.4

Detailed Solution for RRB Group D Mock Test - 21 - Question 62

⇒ 2.36 × 3.47 + 5.4

⇒ 8.1892 + 5.4

⇒ 8.19 + 5.4

⇒ 13.59

∴ 2.36 × 3.47 + 5.4 = 13.59

RRB Group D Mock Test - 21 - Question 63

Which among the following is the first Indian city to have its own logo?

Detailed Solution for RRB Group D Mock Test - 21 - Question 63

The Karnataka government has launched the Bengaluru city logo, the first Indian city to do so, in a bid to resurrect its image as a tourism destination. With this, it joins cities like Amsterdam in The Netherlands and New York in the US to have its own logo. The logo was designed by Nammur, a design start-up, which won a contest and received a prize money of Rs 5 lakh from the government.

RRB Group D Mock Test - 21 - Question 64

What is the chemical name of ‘Baking soda’?

Detailed Solution for RRB Group D Mock Test - 21 - Question 64

Sodium Bicarbonate is the chemical name is ‘baking soda’; it is widely used domestically as a leavening agent in baking.

RRB Group D Mock Test - 21 - Question 65

The Tropic of Cancer does not pass through which of the following states?

Detailed Solution for RRB Group D Mock Test - 21 - Question 65

Tropic of Cancer is the imaginary line at 23.50 degree north of the Equator. In India Tropic of Cancer passes through 8 States: Rajasthan, Gujarat, Madhya Pradesh, Chhattisgarh, Jharkhand, West Bengal, Tripura and Mizoram.

RRB Group D Mock Test - 21 - Question 66

Which principle is used in Washing machine to clean the clothes?

Detailed Solution for RRB Group D Mock Test - 21 - Question 66

Washing machines use centrifugation during the spin cycle to separate water from laundry. 

RRB Group D Mock Test - 21 - Question 67

Which of the following scientists is also known as the Father of Biology?

Detailed Solution for RRB Group D Mock Test - 21 - Question 67

Aristotle is also known as the Father of Biology, he was an ancient Greek philosopher and scientist born in the city of Stagira, Chalkidice in 384 BC.

RRB Group D Mock Test - 21 - Question 68

Which state government inaugurated India’s first National Park for differently abled people?

Detailed Solution for RRB Group D Mock Test - 21 - Question 68

Telangana State Government inaugurated India’s first National Park for differently abled people in Hyderabad. The park will have speech therapist, physiotherapist, vocational training instructors for the differently-abled children. An IT park on similar lines is also being planned in the state.

RRB Group D Mock Test - 21 - Question 69

Which country will host 2018 FIFA World Cup?

Detailed Solution for RRB Group D Mock Test - 21 - Question 69

Russia will be the host of 2018 FIFA World Cup.

RRB Group D Mock Test - 21 - Question 70

If the price of pen decreases by 20%, then a man can buy 10 more pens for Rs 100. What is the new price (in Rs.) of each pen?

Detailed Solution for RRB Group D Mock Test - 21 - Question 70

Let the price of 1 pen initially be Rs. X

⇒ Number of pens he can buy now = 100/x

 After 20% discount price of 1 pen = x(1 – 20/100) = 0.8x

⇒ Number of pens he can buy now = 100/0.8x

According to problem statement,

⇒ 100/0.8x – 100/x = 10 pens

⇒ (100/x) × 1/4 = 10

⇒ x = 2.5

∴ the new price is 2.5 × 0.8 = Rs. 2

RRB Group D Mock Test - 21 - Question 71

A certain sum of money triples itself in 5 years at simple interest. In how many years it will be five times?

Detailed Solution for RRB Group D Mock Test - 21 - Question 71

Let rate be r, principle amount be p and the number of years bet

After 5 years,

⇒ Simple Interest = 3p – p = 2p

⇒ 2p = (p × r × 5)/100

⇒ r = 40

After t years,

⇒ Simple Interest = 5p – p = 4p

⇒ 4p = (p × 40 × t)/100

⇒ t = 10

∴ It will take 10 years

RRB Group D Mock Test - 21 - Question 72

Which of the following gases is essential for the process of photosynthesis?

Detailed Solution for RRB Group D Mock Test - 21 - Question 72

During photosynthesis, the plants take carbon dioxide and water and turn it into sugar, among other compounds. They also release oxygen in the daytime because of this process.

RRB Group D Mock Test - 21 - Question 73

What is the chemical name of ‘Plaster of Paris’?

Detailed Solution for RRB Group D Mock Test - 21 - Question 73

Calcium sulphate hemihydrate is the chemical name of ‘Plaster of Paris’; It is widely used in the construction of buildings and is also used in sculpturing because of its brittle nature.

RRB Group D Mock Test - 21 - Question 74

'Ampere' is the measurement unit of which of the following?

Detailed Solution for RRB Group D Mock Test - 21 - Question 74

The ampere (a) is the SI unit of Electric Current. It is named after André - Marie Ampère a, French mathematician and physicist, considered the father of electrodynamics.

RRB Group D Mock Test - 21 - Question 75

What is the total number of bones in human head?

Detailed Solution for RRB Group D Mock Test - 21 - Question 75

The total number of bones in a human head is 29.

RRB Group D Mock Test - 21 - Question 76

Which of the following is an insectivorous plant?

Detailed Solution for RRB Group D Mock Test - 21 - Question 76

Pitcher Plant is an insectivorous plant. An insectivorous plant is one that consumes insects as food and uses various agents to attract them.

RRB Group D Mock Test - 21 - Question 77

Sahaj Bijli Har Ghar Yojna – Saubhagya Scheme has been launched in which state?

Detailed Solution for RRB Group D Mock Test - 21 - Question 77

Jammu and Kashmir government launched Sahaj Bijli Har Ghar Yojana (Saubhagya Scheme) across the state in December 2017. This scheme will provide free electricity connections to all the poor citizens of the state.

RRB Group D Mock Test - 21 - Question 78

A shopkeeper sells a table at a discount of 20% and earns a profit of 60%. If he sells the same table at 40% discount, then what will be his new profit percent?

Detailed Solution for RRB Group D Mock Test - 21 - Question 78

Let the Cost price of the table be a

Since he gains a profit of 60%, the selling price = a + (60/100) x a = 1.6a

Let the Marked price of the table be b

⇒ b – (20/100) x b = 1.6a

⇒ b = 2a

Now, if he sells the table at 40% discount

⇒ New selling price will be = 2a – (2a) x (40/100)

⇒ New selling price = 1.2a

∴ New profit percent = [(1.2a – a)/a] x 100 = 20%

RRB Group D Mock Test - 21 - Question 79

A deficiency of vitamin A results in ____.

Detailed Solution for RRB Group D Mock Test - 21 - Question 79

Xerophthalmia is a medical condition in which the eye fails to produce tears. It may be caused by vitamin A deficiency.

RRB Group D Mock Test - 21 - Question 80

What is the time taken by the pendulum to complete one oscillation called?

Detailed Solution for RRB Group D Mock Test - 21 - Question 80

The time taken by pendulum bob to complete one vibration or one oscillation is called the time period of pendulum.

RRB Group D Mock Test - 21 - Question 81

Directions: Study the following table and answer the questions based on itScholars Going To Foreign Universities For PHD From Different States ​ Question:Which state has shown continuous growth in the number of scholars over the stated years?

Detailed Solution for RRB Group D Mock Test - 21 - Question 81

As just looking into the table, we can say no state except Delhi has shown continuous growth in number of scholars going to abroad over the years.

∴ Option 3 is correct

RRB Group D Mock Test - 21 - Question 82

Directions: Study the following table and answer the questions based on itScholars Going To Foreign Universities For PHD From Different States ​ Question:Which state has shown continuous growth in the number of scholars over the stated years?

Question:

Calculate the Average number of scholars going abroad in 2001 from different states?

Detailed Solution for RRB Group D Mock Test - 21 - Question 82

Average = Sum/Number of terms

Sum = 900 + 1200 + 940 + 220 + 298 = 3558

Number of terms = 5

∴ Average = 3558/5 = 711.6

RRB Group D Mock Test - 21 - Question 83

Directions: Study the following table and answer the questions based on itScholars Going To Foreign Universities For PHD From Different States ​ Question:Which state has shown continuous growth in the number of scholars over the stated years?

Question:

What was the percentage decrease in the number of scholars from Tamil Nadu from 2000 to 2001?

Detailed Solution for RRB Group D Mock Test - 21 - Question 83

% increase = Increase/Original Value

% increase from 2000 to 2001 = [ {Value (2000) - Value(2001)}/Value(2000)] × 100

⇒ % increase from 2000 to 2001 = [(340 - 220)/340] × 100 = 120 × 100/340

∴ % increase from 2000 to 2001 ≈35.3%

RRB Group D Mock Test - 21 - Question 84

Directions: Study the following table and answer the questions based on itScholars Going To Foreign Universities For PHD From Different States ​ Question:Which state has shown continuous growth in the number of scholars over the stated years?

Question:

From which state among the following did least number of scholars moved to Foreign countries over the years?

Detailed Solution for RRB Group D Mock Test - 21 - Question 84


 

For this, calculate the total number of scholars moved abroad over the given years

West Bengal = 580 + 340 + 450 + 900 + 760 = 3030

Delhi = 460 + 500 + 720 + 1200 + 1360 = 4240

Maharashtra = 670 + 750 + 430 + 940 + 860 = 3650

Tamil Nadu = 200 + 600 + 340 + 220 + 500 = 1860 → Minimum

Kerala = 128 + 450 + 876 + 298 + 567 = 2319

∴ Tamil Nadu shows the least number of scholars going abroad over the years

RRB Group D Mock Test - 21 - Question 85

Which one is the largest among the fractions (5/113), (7/120), (13/145) and (17/160)?

Detailed Solution for RRB Group D Mock Test - 21 - Question 85

We know that

⇒ 5/113 = 0.04

⇒ 7/120 = 0.05

⇒ 13/145 = 0.089

⇒ 17/160 = 0.10625

∴ 17/160 is largest

RRB Group D Mock Test - 21 - Question 86

Two trains are moving in the same directions at speed of 43 km/h and 51 km/h respectively. The time taken by the faster train to cross a man sitting in the slower train is 72 seconds. What is the length (in metres) of the faster train?

Detailed Solution for RRB Group D Mock Test - 21 - Question 86

Given: The speed of 2 trains = 43 km/hr and 51 km/hr

Relative velocity of one train w.r.t. another = (51 - 43)km/hr = 8 km/hr

Relative velocity in m/s = 8 × (5/18) m/s

⇒ Distance covered by the train in 72 sec = 8 × (5/18) × 72 = 160

Since, this is the distance covered in crossing the man

Hence, the length of faster train = 160 m

RRB Group D Mock Test - 21 - Question 87

Which of the following is used to measure sound under water?

Detailed Solution for RRB Group D Mock Test - 21 - Question 87

A hydrophone is a microphone designed to be used underwater for recording or listening to underwater sound. Most hydrophones are based on a piezoelectric transducer that generates electricity when subjected to a pressure change.

RRB Group D Mock Test - 21 - Question 88

Dry ice is the solid form of which of the following?

Detailed Solution for RRB Group D Mock Test - 21 - Question 88

Dry ice is the solid form of Carbon Dioxide. It has lower temperature than the water ice and is used as a cooling agent. 

RRB Group D Mock Test - 21 - Question 89

Which of the following is the chemical name of common salt?

Detailed Solution for RRB Group D Mock Test - 21 - Question 89

Sodium Chloride is the chemical name of common salt. It is formed when Sodium and Chlorine react with each other to give this salt and water.

RRB Group D Mock Test - 21 - Question 90

Lime water becomes milky when it is exposed in the air because of the presence of?

Detailed Solution for RRB Group D Mock Test - 21 - Question 90

Lime water becomes milky when it is exposed in the air because of the presence of Carbon dioxide. Both of them react together to form calcium carbonate which is insoluble and white.

RRB Group D Mock Test - 21 - Question 91

What branch of medical science deals with the skin of humans?

Detailed Solution for RRB Group D Mock Test - 21 - Question 91

Dermatology is the branch of medical science that deals with the skin of humans. Neuroscience, Urology and Radiology deal with nervous system, excretory system and handling of radiation emitting medical equipment respectively. 

RRB Group D Mock Test - 21 - Question 92

What is the largest white blood corpuscle called?

Detailed Solution for RRB Group D Mock Test - 21 - Question 92

Monocyte is the largest white blood corpuscle. Their count is used to diagnose various kinds of diseases. 

RRB Group D Mock Test - 21 - Question 93

If ‘ ÷ ’ means ‘ × ’, ‘ – ‘ means ‘ ÷ ’, ‘ + ’ means ‘– ‘ and ‘ × ’ means ‘ + ’ then what is the value of:180 ÷ 6 + 36 – 9 × 18

Detailed Solution for RRB Group D Mock Test - 21 - Question 93

Changing operators as given format.

÷ → ×

– → ÷

× → +

+ → –

→ 180 ÷ 6 + 36 – 9 × 18 will be 180 × 6 – 36 ÷ 9 + 18

→ 180 × 6 – 4 + 18

→ 1094.

Hence, answer is 1094.

RRB Group D Mock Test - 21 - Question 94

The value of

Detailed Solution for RRB Group D Mock Test - 21 - Question 94

RRB Group D Mock Test - 21 - Question 95

Directions: Study the following information carefully to answer the given questions.7 teachers B, Y, Z, X, D, R, J teach 7 subjects- Chemistry, Physics, English, German, French, Sanskrit and Math from Monday to Sunday not necessarily in the same order.
I) German is taught in the last day of the week by R. Y teaches English on Thursday. Chemistry is taught 5 days before R teaches but not by Z. Math is taught 3 days before Y.
II) English teacher is immediately followed by Z. X doesn’t teach a language. J teaches Sanskrit and D teaches on the second day.

Question:
Who teaches French?

Detailed Solution for RRB Group D Mock Test - 21 - Question 95

Teacher B, Y, Z, X, D, R, J

Subjects- Chemistry, Physics, English, German, French, Sanskrit and Math

1) German is taught in the last day of the week. Y teaches English on Thursday. Chemistry is taught 5 days before R teaches but not by Z. Math is taught 3 days before Y.

 

2) II)English teacher is immediately followed by Z.. X doesn’t teach a language. J teaches Sanskrit and D teaches on the second day.

Z is immediately followed by English teacher thus Z teaches on Friday. X doesn’t teach a language and hence X teaches either Math or Physics. J teaches Sanskrit. D teaches on the second day and teaches Chemistry. Z teaches French.

Hence Z teaches French.

RRB Group D Mock Test - 21 - Question 96

Directions: Study the following information carefully to answer the given questions.7 teachers B, Y, Z, X, D, R, J teach 7 subjects- Chemistry, Physics, English, German, French, Sanskrit and Math from Monday to Sunday not necessarily in the same order.
I) German is taught in the last day of the week by R. Y teaches English on Thursday. Chemistry is taught 5 days before R teaches but not by Z. Math is taught 3 days before Y.
II) English teacher is immediately followed by Z. X doesn’t teach a language. J teaches Sanskrit and D teaches on the second day.
Question:
Who teaches on the second last day of the week?

Detailed Solution for RRB Group D Mock Test - 21 - Question 96

Teacher B, Y, Z, X, D, R, J

Subjects- Chemistry, Physics, English, German, French, Sanskrit and Math

1) German is taught in the last day of the week. Y teaches English on Thursday. Chemistry is taught 5 days before R teaches but not by Z. Math is taught 3 days before Y.

 

2) II) English teacher is immediately followed by Z. X doesn’t teach a language. J teaches Sanskrit and D teaches on the second day.

Z is immediately followed by English teacher thus Z teaches on Friday. X doesn’t teach a language and hence X teaches either Math or Physics. J teaches Sanskrit. D teaches on the second day and teaches Chemistry. Z teaches French.

Hence J teaches on the second last day.

RRB Group D Mock Test - 21 - Question 97

Directions: Study the following information carefully to answer the given questions.7 teachers B, Y, Z, X, D, R, J teach 7 subjects- Chemistry, Physics, English, German, French, Sanskrit and Math from Monday to Sunday not necessarily in the same order.
I) German is taught in the last day of the week by R. Y teaches English on Thursday. Chemistry is taught 5 days before R teaches but not by Z. Math is taught 3 days before Y.
II) English teacher is immediately followed by Z. X doesn’t teach a language. J teaches Sanskrit and D teaches on the second day.

Question:
Which subject is taught on Saturday?

Detailed Solution for RRB Group D Mock Test - 21 - Question 97

Teacher B, Y, Z, X, D, R, J

Subjects- Chemistry, Physics, English, German, French, Sanskrit and Math

1) German is taught in the last day of the week. Y teaches English on Thursday. Chemistry is taught 5 days before R teaches but not by Z. Math is taught 3 days before Y.

 

2) II) English teacher is immediately followed by Z. X doesn’t teach a language. J teaches Sanskrit and D teaches on the second day.

Z is immediately followed by English teacher thus Z teaches on Friday. X doesn’t teach a language and hence X teaches either Math or Physics. J teaches Sanskrit. D teaches on the second day and teaches Chemistry. Z teaches French.

Hence J teaches on the second last day.
Sanskrit is taught on Saturday.

RRB Group D Mock Test - 21 - Question 98

As per a UN report, India's economy will grow at ____% in 2018.

Detailed Solution for RRB Group D Mock Test - 21 - Question 98

Indian economy will grow at 7.2% in 2018 & accelerate to 7.4% in the following year as a result of robust private consumption, public investment & structural reforms, a UN report said. Despite slowdown in early 2017 & lingering effects from demonetisation policy, the outlook for India remains largely positive. The report also forecast that inflation in India will be 4.5% in 2018 & 4.8% in 2019.

RRB Group D Mock Test - 21 - Question 99

When is Vijay Diwas celebrated in India?

Detailed Solution for RRB Group D Mock Test - 21 - Question 99

The day marks the glorious victory over Pakistan during the Indo-Pakistani War of 1971, in alliance with Bangladesh Mukti Bahini.On 16th December in 1971, the Pakistani forces chief, General Amir Abdullah Khan Niazi, along with 93,000 troops, surrendered to the allied forces consists of Indian Army. It is observed by paying tributes to the martyrs who laid down their lives for the nation.

RRB Group D Mock Test - 21 - Question 100

What was the theme for the 2017 International Migrants Day?

Detailed Solution for RRB Group D Mock Test - 21 - Question 100

Adopted by the United Nations in 2000, the International Migrants Day is celebrated every year on December 18.The day is intended to raise awareness about migrant rights amid rising migration and globalization.The theme for 2017 was  'Safe Migration in a World on the Move'.According to UN, the total number of international migrants are 244 million, highest ever in human history.

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