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RRB JE ECE (CBT I) Mock Test- 8


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100 Questions MCQ Test RRB JE Mock Test Series for ECE | RRB JE ECE (CBT I) Mock Test- 8

RRB JE ECE (CBT I) Mock Test- 8 for Railways 2022 is part of RRB JE Mock Test Series for ECE preparation. The RRB JE ECE (CBT I) Mock Test- 8 questions and answers have been prepared according to the Railways exam syllabus.The RRB JE ECE (CBT I) Mock Test- 8 MCQs are made for Railways 2022 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for RRB JE ECE (CBT I) Mock Test- 8 below.
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RRB JE ECE (CBT I) Mock Test- 8 - Question 1

Marie Curie was awarded Nobel Prize in Chemistry in 1911 for her discovery of ___________ and Polonium.

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 1 Marie Curie was awarded The Nobel Prize in Chemistry 1911 in recognition of her services to the advancement of chemistry by the discovery of the elements radium and polonium.

She successfully isolated radium and conducted study upon its nature and characteristics.

RRB JE ECE (CBT I) Mock Test- 8 - Question 2

Ashok remembers his birthday is after 21st December. While his mother remembers his birthday is before 23rd December. On which date of December is his birthday?

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 2 As Ashok remembers, his birthday is after the 21st and his mother remembers his birthday is before 23rd, therefore, his birthday is on 22nd December.
RRB JE ECE (CBT I) Mock Test- 8 - Question 3

If in a frequency distribution, the mean and median are 21 and 22 respectively, then its mode is approximately-

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 3 Mode + 2 Mean = 3 Median

Mode = 3 × 22 - 2 × 21 = 66 - 42 = 24.

RRB JE ECE (CBT I) Mock Test- 8 - Question 4

O is the center of the circle. AC and BD are two chords of the circle intersecting each other at P. If ∠APB=300, ∠APB=300, and ∠AOB=450∠AOB=450 then ∠DOC∠DOC is equal to ?

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 4

RRB JE ECE (CBT I) Mock Test- 8 - Question 5

A does 60% of the work in 45 days. He then calls B, and they together finish the remaining work in 18 days. How long B alone would take to do the whole work?

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 5

Time of A to do complete work

= 45/60 x 100 = 75

Time of A+B to do complete work

= 18/40 x 100 = 45

Let time of B to do complete work alone is T

= 1/45 1/75 = 1/T

T = 112.5 days

RRB JE ECE (CBT I) Mock Test- 8 - Question 6

Abhinash gets 32% marks out of 300 in computer Science. How much marks out of 200 he should get in java language paper so that out of total marks his percentage becomes 46% -

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 6 Abhinash get marks in computer science = 300×32/100=96

Total marks in both subjects = 500×46/100=230

In java = 230−96=134

Required percentage = =134/200×100=67%

RRB JE ECE (CBT I) Mock Test- 8 - Question 7

There are two taps P and Q that can fill a tank in 12 and 24 minutes respectively. Both of them are opened together and after 4 minutes Q is closed. How long does it take for P alone to fill the tank?

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 7

Part of a tank filled in 1 Minute by tank P = 1/12

Part of a tank filled in 1 Minute by tank Q = 1/24

Part of tank Filled by P and Q in 4 minutes = 4 x (1/12 + 1/24) = 4 x 3/24 = 1/2

Remaining part = 1 - 1/2 = ½

Equating Time and part filled, = 1/12 x 2/1 = 1/x

X = 6 minutes

RRB JE ECE (CBT I) Mock Test- 8 - Question 8

Find the compound interest on a sum of Rs 425 compounded half yearly for 2 years at the rate of 4%.

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 8

The compound interest for the given condition can be given by,

Therefore, the compound interest is Rs 35.03.

RRB JE ECE (CBT I) Mock Test- 8 - Question 9

Average age of 6 boys is 14 years. The average age of 11 girls is 12 years. What is the average age (in years) of all boys and girls?

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 9

Average of 6 boys = Sum of the age of 6 boys/6

⇒ 14 = sum of ages of 6 boys/6

⇒ Sum of the age of 6 boys = 84

Now,

Average of 11 girls = sum of age of 11 girls/11

⇒ 12 = sum of age of 11 girls/11

⇒ Sum of the age of 11 girls = 132

Now,

Sum of age of all girls and boys together = 84 + 132 = 216

∴ Average = 216/17 = 12.7

RRB JE ECE (CBT I) Mock Test- 8 - Question 10

The value of tan 40. tan 430 .tan 470 .tan 860 is-

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 10

tan40. tan430. tan470 tan860

=. tan40 tan430. cot40 cot430

= 1

∴ (tan(900 - 9) = cotθ)

RRB JE ECE (CBT I) Mock Test- 8 - Question 11

Profit obtained from selling an article for Rs 310 equals the loss incurred on selling that article for Rs 230. What will be the loss percentage when the selling price is Rs 180?

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 11 As the percentage of profit is equal to percentage of loss,

Profit/loss = (310 - 230) / 2

⇒ 80 / 2 = 40

Cost price = (230 + 40) or (310 - 40) = 270

Loss percentage when selling price is 180 = {(270 - 180) / 270} x 100

⇒ (90/270) x 100 = 100/3 = 33 1/3

Hence, option C is the correct answer.

RRB JE ECE (CBT I) Mock Test- 8 - Question 12

Diameter of the cylindrical vessel is 14 cm. having some water. When a sphere of iron is totally submerged in this water level of water increases by 913 cm. What is the radius of the sphere?

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 12 Let R be the radius of the ball.

Then,

The volume of water displaced = Volume of iron ball

⇒ R3 = 73

⇒ R = 7.

RRB JE ECE (CBT I) Mock Test- 8 - Question 13

The given figure, AB = 16 cm, AC = 12 cm, BC = 14 cm, then the length of median AD will be -

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 13

(16)2 + (12)2 = 2(AD2 + CD2)

256 + 144 = 2AD2 + 98

AD = √151

RRB JE ECE (CBT I) Mock Test- 8 - Question 14

Directions: Each question is followed by 2 statements. Go through these questions and answer the questions as per the instructions : choose your answer as: (A) If the question can be answered by using only statement (I), but not by using statement (II) alone. (B) If the question can be answered by using only statement (II), but not by using statement (I) alone. (C) If the question can be answered by using both the statements together, but cannot be answered by using either statement alone. (D) If the question cannot be answered by using both the statements together.

What is the number?

A. The product of two digits of a number is 27.

B. The sum of the two digits is 12. The ratio of the ten's digit to the unit digit is 3:1.

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 14

Let the ten's and unit's digit be x and y respectively.

From A, xy = 27

From B, x + y = 12 and

Now,

3y +y = 12

4y = 12 ⇒ = 3

x = 3y = 9 Number = 93

Thus, B alone gives the answer and A alone does not give the answer

RRB JE ECE (CBT I) Mock Test- 8 - Question 15

Two places R and S are 800 km apart from each other. Two persons start from R towards S at an interval of 2 hours. Whereas A leaves R for S before B. The speeds of A and B are 40 km/h and 60 km/h respectively. B overtakes A at M, which is on the way from R to S. What is the distance from R, where B overtakes A?

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 15 Distance between R and M = 4 * 60 = 240
RRB JE ECE (CBT I) Mock Test- 8 - Question 16

The area of a square is 72.25 cm2 . Find its perimeter (in cm).

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 16 Area of square = side side =72.25

Side = 8.5

Perimeter = 4 side = 4 8.5 = 34cm

RRB JE ECE (CBT I) Mock Test- 8 - Question 17

Arrange the fractions 3/4, 5/12, 13/16, 16/29, 3/8 in their ascending order of magnitude.

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 17

RRB JE ECE (CBT I) Mock Test- 8 - Question 18

The concentration of acid in two solutions A and B is 19 percent and 9 percent respectively.In what ratio solution A and B should be mixed to get a solution having 17 percent acid?

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 18 Using Alligation method-

The required ratio = 8:2 = 4:1

RRB JE ECE (CBT I) Mock Test- 8 - Question 19

Find the greatest number which on dividing 1580 and 3800 leaves remainders 8 and 1 respectively

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 19 HCF of (1580-8) and (3800-1) will be the greatest number

So HCF of 1572 and 3799

So, 131 Is the number.

RRB JE ECE (CBT I) Mock Test- 8 - Question 20

What must be added to each term of the ratio 2 : 5 so that it may equal to 5 : 6 ?

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 20

Suppose x must be added.

Then, 2+x/5+x=5/6

12 + 6x = 25 + 5x

x = 13

RRB JE ECE (CBT I) Mock Test- 8 - Question 21

The angle of elevation of the top of a tower at a distance of 25 m from its foot is 600. The approximate height of the tower is -

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 21 We know that

tanθ = p/b

Therefore

tan60 = √3 = p/25 → p = 25√3

= 25 x 1.73

= 43.3 m

RRB JE ECE (CBT I) Mock Test- 8 - Question 22

How many whole numbers are there between 52 and 356 which are exactly divisible by 6?

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 22 First whole number which is divisible by 6 between 52 and 356 is 54

Last whole number which is divisible by 6 between 52 and 356 is 354

So, by using AP formula:-

Last term = first term + (number of terms-1) × Common difference

354 = 54 + (n-1) × 6

300 = (n-1) × 6

50= (n-1)

So, n =51

Therefore,

There are 51 whole numbers between 52 and 356 which are exactly divisible by 6.

RRB JE ECE (CBT I) Mock Test- 8 - Question 23

Directions: In the following problems, there is one question and some statements given below the question. You have to decide whether the data given in the statements is sufficient to answer the question. Read all the statements carefully and find out which of the statements is/are sufficient to answer the given question. Choose the correct alternative for each question.

Question:

What will be the total weight of 10 poles, each of the same weight ?

Statements:

I. One-fourth of the weight of each pole is 5 kg.

II. The total weight of three poles is 20 kilograms more than the total weight of two poles.

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 23 From I, we conclude that weight of each pole = (4 x 5) kg = 20 kg.

So, total weight of 10 poles = (20 x 10) kg = 200 kg.

From II, we conclude that:

Weight of each pole = (weight of 3 poles) - (weight of 2 poles) = 20 kg.

So, total weight of 10 poles = (20 x 10) kg = 200 kg.

RRB JE ECE (CBT I) Mock Test- 8 - Question 24

B starts some business by investing Rs 90000. After 4 months, D joins the business by investing Rs 80000. At the end of the year, in what ratio will they share the profit?

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 24

RRB JE ECE (CBT I) Mock Test- 8 - Question 25

Calculate the total numbers of prime factors in the expression (9)11 × (5)7 × (3)2 × (17)2

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 25

(9)11 × (5)7 × (7)5 × (3)2 × (17)2

⇒ (3²)11 × (5)7 × (7)5 × (3)2 × (17)2

⇒ (3)(22 + 2) × (5)7 × (7)5 × (17)2 = (3)24 × (5)7 × (7)5 × (17)2

∴ Total number of prime factors = sum of the powers of the expression = 24 + 7 + 5 + 2 = 38

RRB JE ECE (CBT I) Mock Test- 8 - Question 26

What is the net discount (in %) for successive discounts of 30% and 50%?

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 26

Formula used:

Successive discount = X + Y - (XY)/100

Where,

X = First discount

Y = Second discount

Calculation:

Successive discount = X + Y - (XY)/100

X = 30%, Y = 50%

⇒ 30 + 50 - 1500/100

⇒ 65%

∴ The single equivalent discount is 65%.

RRB JE ECE (CBT I) Mock Test- 8 - Question 27

In a mixture of 45 litres, the ratio of liquid A and liquid B is 7 : 2. If 11 litres of liquid B is added to the mixture, then what will be the ratio of liquid A and liquid B in the new mixture?

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 27 Let Liquid A and Liquid B be 7x and 2x respectively.

ATQ,

7x+2x = 45

9x = 45

So, x = 5

And, Liquid A is 35 and Liquid B is 10 litres respectively.

Liquid B becomes 21 litres.

Therefore,

Liquid A/Liquid B = 35/21 = 5/3

RRB JE ECE (CBT I) Mock Test- 8 - Question 28

- 5/3 = -1/6, then the value of x is:

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 28

RRB JE ECE (CBT I) Mock Test- 8 - Question 29

A shopkeeper offers a Rs. 19% discount on a mobile phone with a marked price of Rs. 7400. If he still earns a profit of Rs. 500, what is the cost price of the phone?

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 29 Selling Price = Marked Price × (100-Discount) %

Therefore,

SP = 7400 × (100-19) %

SP=7400×81/100

SP = 5994

So,

Cost Price = Selling Price - Profit

CP = 5994-600

CP = 5494

RRB JE ECE (CBT I) Mock Test- 8 - Question 30

The following equation is incorrect. Which two signs should be interchanged to correct the equation?

12 + 8 - 25 ÷ 10 x 18 = 14

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 30

Given expression: 12 + 8 - 25 ÷ 10 × 18 = 14

1) ÷ and - → 12 + 8 ÷ 25 - 10 × 18 = - 167.68 ≠ 14

2) + and ÷ → 12 ÷ 8 - 25 + 10 × 18 = 156.5 ≠ 14

3) - and + → 12 - 8 + 25 ÷ 10 × 18 = 49 ≠ 14

4) × and - → 12 + 8 × 25 ÷ 10 - 18 = 14

Hence, “ × and - “ should be interchanged to correct the equation.

RRB JE ECE (CBT I) Mock Test- 8 - Question 31

Two pipes can fill a tank in 1hr. and 72 min respectively. Both the pipes are open together but due to some dust in the pipe, the efficiency pipes are decreased to 5/6 and 9/10 of their actual efficiency respectively. After some time the dust in both pipes get clear together and both pipes run with their full efficiency and then the tank can be filled in 31 min. Find out how much time it takes to clear dust.

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 31

L.C.M. --- 360

A = 60 --- 6

B = 72 --- 5

An = 6 x 5/6 = 5, Bn = 5 x 9/10 = 4.5

(6 + 5) x 31 + (5 + 435) x x = 360, x = 2

RRB JE ECE (CBT I) Mock Test- 8 - Question 32

In each of the questions given below, which one of the five answer figures on the right should come after the problem figures on the left, if the sequence were continued?

Question Figure:

Answer Figure:

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 32

The sequence of problem figures is

and the whole figure rotates by 90° clockwise.

RRB JE ECE (CBT I) Mock Test- 8 - Question 33

In the question given below, an unfolded dice is given while four answer choices are given in the form of complete dice. Select the correct answer which is formed by folding the unfolded dice.

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 33

Now, it is clear that all cubes I, II, III & IV can be formed by folding the dice.

RRB JE ECE (CBT I) Mock Test- 8 - Question 34

Select the odd letter/word/number from the given alternatives.

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 34 In all other groups of words there is a gap of one letter as in the alphabet between the second and third letter.
RRB JE ECE (CBT I) Mock Test- 8 - Question 35

How many such letters are there in the word BEACON each of which is as far away from the beginning as the word as when they are arranged in alphabetical order?

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 35

Original word: B E A C O N

On Arranging: A B C E N O

Required letters = None

RRB JE ECE (CBT I) Mock Test- 8 - Question 36

Select the related word/ number from the given alternatives.

MANISH : JDKLPK :: SANJOG : ?

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 36

RRB JE ECE (CBT I) Mock Test- 8 - Question 37

A word is represented by only one set of numbers as given in any of the alternatives. The set of numbers given in the alternatives are represented by two classes of alphabets as in the 2 matrices given below. The columns and rows of Matrix I are from 0 to 4 and that of Matrix II from 5 to 9. A letter can be represented first by its row and next by its column number. e.g., ‘C’ can be represented by 02, 21, etc. ‘T’ can be represented by 65, 96 etc. Similarly, you have to identify the correct set for the word given below.

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 37 According to the question,

A = 75, 56, 87, 68, 99

D = 00, 31, 12, 43, 24

J = 85, 66, 97, 78, 59

U = 95, 76, 57, 88, 69

S = 55, 86, 67, 98, 79

T = 65, 96, 77, 58, 89

So, ADJUST = 87, 31, 66, 69, 86, 89

RRB JE ECE (CBT I) Mock Test- 8 - Question 38

What should come at the place of the question mark?

N5V, K7T, ?, E14P, B19N

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 38

RRB JE ECE (CBT I) Mock Test- 8 - Question 39

What should come at the place of the question mark?

KM5, IP8, GS11, EV14, ?

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 39

RRB JE ECE (CBT I) Mock Test- 8 - Question 40

In questions given below, select the number from the given alternatives.

1:8 :: 4: ?

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 40

RRB JE ECE (CBT I) Mock Test- 8 - Question 41

In the question, select the related letters from the given alternatives.

REASON : SBFLXC :: STAIRS : ?

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 41

RRB JE ECE (CBT I) Mock Test- 8 - Question 42

If the 3rd day of a month is Monday, which day will fall on the 5th day after the 21st of that month?

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 42 The 3rd day is Monday. So, the 10th and 17th days are also Mondays.

Thus, the 21st day is Friday.

.'. The fifth day from the 21st will be Wednesday.

RRB JE ECE (CBT I) Mock Test- 8 - Question 43

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

How many such pairs of letters are there in the word ‘OVERWHELM ‘ each of which has as many letters between them in the word as in the English alphabet?

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 43

Alternate solution:

OVERWHELM

In Forward direction:

OPQR = OVER (OR has as many letters between them in the word as in the English alphabet)

ERWH = EFGH (EH has as many letters between them in the word as in the English alphabet)

LM = LM (LM has as many letters between them in the word as in the English alphabet)

In Reverse direction:

RWHELM = RQPONM(RM has as many letters between them in the word as in the English alphabet)

So, Required number of pairs of letters is 4. So, More than three is correct.

RRB JE ECE (CBT I) Mock Test- 8 - Question 44

Complete the given series:

6, 12, 30, 56, ?

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 44 The given series follows the pattern

(prime number)2 + (prime number)

So, 22+2=4+2=6,

32+3=9+3=12,

52+5=25+5=30,

72+7=49+7=56,

112+11=121+11=132.

Hence the required term will be 132.

RRB JE ECE (CBT I) Mock Test- 8 - Question 45

DIRECTIONS: Arrange the following in a logical order:

(i) Collector

(ii) Governor

(iii) Chief Secretary

(iv) President

(v) Clerk

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 45 Meaningful order of the words in ascending order is as follows

Clerk → Collector → Chief → Secretary → Governor → President

RRB JE ECE (CBT I) Mock Test- 8 - Question 46

In an examination in English, Harsh obtained more marks than the total of marks obtained by Kunal and Debu. The total of marks obtained by Kunal and Shankar were more than Harsh. Sonal obtained more marks than Shankar. Neha obtained more marks than Harsh. Who amongst them obtained the highest marks?

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 46 According to the question,

Kunal + Debu < Harsh…(1)

Kunal + Shankar > Harsh …(2)

Sonal > Shankar

Neha > Harsh

From (1) and (2)

Kunal + Debu < Harsh < Kunal + Shankar

Therefore, data is inadequate to answer who got the highest marks.

RRB JE ECE (CBT I) Mock Test- 8 - Question 47

Vivek and Ashok start from a fixed point. Vivek moves 3 km north and turns right and then covers 4 km. Ashok moves 5 km west and turns right and walks 3 km. How far are they apart?

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 47

Required distance = 5 + 4 = 9 km

RRB JE ECE (CBT I) Mock Test- 8 - Question 48

Find the odd word from the given alternatives

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 48 Except Gourd, all others are grown underground.
RRB JE ECE (CBT I) Mock Test- 8 - Question 49

Select the related word/ number from the given alternatives.

(7, 27, 55)

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 49 Given

7, 7×4 = 28−1 = 27, 7×8 = 56−1= 55

Same way

(9, 9×4 = 36−1 = 35, 9×8 = 72−1 = 71)

RRB JE ECE (CBT I) Mock Test- 8 - Question 50

Choose the odd one out from the given alternatives.

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 50 Cobbler is a human being while all others are used by human beings.
RRB JE ECE (CBT I) Mock Test- 8 - Question 51

Four of the following five pairs have the same relation between their elements and hence form a group. Which one does not belong to that group?

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 51 Only the tiger and the tigress hold the male and female relationship, while the remaining hold the parent and offspring relationship.
RRB JE ECE (CBT I) Mock Test- 8 - Question 52

How many rural uneducated people are employed?

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 52 There are 10 who are rural uneducated people who are employed.
RRB JE ECE (CBT I) Mock Test- 8 - Question 53

In each of the questions given below, which one of the five answer figures on the right should come after the problem figures on the left, if the sequence were continued?

Problem Figure:

Answer Figure:

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 53 From figure 1 to fig.2, lower part is kept fixed and upper half is rotated clockwise. from 2 to 3 upper part is kept fixed, and lower half is rotated anticlockwise. from fig.3 to 4, the whole structure is rotated 1 step anticlockwise.again from 4 to 5 fig. lower part is fixed and upper part clockwise so for next fig it should be upper part fixed and lower part anticlockwise
RRB JE ECE (CBT I) Mock Test- 8 - Question 54

In the following l,etter series, some of the letters are missing which are given in that order by one of the alternatives below it. Select the correct alternative.

a_ab_bcbc_caca_

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 54

RRB JE ECE (CBT I) Mock Test- 8 - Question 55

Find the missing number from the following given figures.

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 55 In figure I = 15 × 4 = 60,

15+4 = 19

In figure II = 3 x 8 = 24,

3 + 8=11

Then missing number is = 10 × 4

= 40

RRB JE ECE (CBT I) Mock Test- 8 - Question 56

Rajiv is the brother of Arun. Sonia is the sister of Sunil. Arun is the son of Sonia. How is Rajiv related to Sunil?

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 56

Rajiv and Arun are sons of Sonia. Therefore, Rajiv is the nephew of Sunil.

RRB JE ECE (CBT I) Mock Test- 8 - Question 57

The first Viceroy of India was.

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 57 The first viceroy of India was lord Cannings. After the mutiny of 1857, the title of viceroy was created in 1858. Before 1858, it was the East India Company who was ruling large parts of India and the head of administration of the East India Company was called Governor general. This office was created in 1773 (by regulating act)
RRB JE ECE (CBT I) Mock Test- 8 - Question 58

15th edition of Pravasi conference will be held in:

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 58 The 15th edition of the Pravasi conference will be held in Varanasi close to the site of ‘Ardh Kumbh’.
RRB JE ECE (CBT I) Mock Test- 8 - Question 59

How many members of the Anglo-Indian community can be nominated by the President of India to the Parliament?

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 59 The Constitution provides that the maximum strength of the House be 552 members. Up to 525 members represent the territorial constituencies in States, up 20 members represent the Union Territories and no more than two members from Anglo-Indian community can be nominated by the President of Indian if he or she feels that the community is not adequately represented.
RRB JE ECE (CBT I) Mock Test- 8 - Question 60

Which Amendment of the Constitution deals with Political defections?

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 60 The fifty-second Amendment 1985, inserted the Tenth Schedule in the constitution regarding provisions as to disqualification on the grounds of defection.
RRB JE ECE (CBT I) Mock Test- 8 - Question 61

Which is the highest peak of India?

RRB JE ECE (CBT I) Mock Test- 8 - Question 62

Where will the two new Indian Institutes of Science Education & Research (IISERs) be established?

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 62 The Union Cabinet chaired by Prime Minister Shri Narendra Modi has approved the establishment and operationalization of permanent campuses of the two new Indian Institutes of Science Education & Research (IISERs) at Tirupati (Andhra Pradesh) and Berhampur (Odisha).
RRB JE ECE (CBT I) Mock Test- 8 - Question 63

The older alluvium is called

RRB JE ECE (CBT I) Mock Test- 8 - Question 64

In Shivaji’s Council of MinistersThe nephron, the Prime minister was called.

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 64 The Ashta Pradhan was a council of ministers that administered the Maratha empire.
RRB JE ECE (CBT I) Mock Test- 8 - Question 65

Which river of India is called Dakshin Ganga?

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 65 the Godavari is considered the Dhakshin (Southern) Ganga, and it is the largest river in peninsular India. It rises near Nasik in Maharashtra.
RRB JE ECE (CBT I) Mock Test- 8 - Question 66

Money Bills are described in the Article _________.

RRB JE ECE (CBT I) Mock Test- 8 - Question 67

Who was the First Indian Nobel Prize winner?

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 67 Rabindranath Tagore (1861-1941) was a poet, philosopher, educationist, artist and social activist. In 1913, he was awarded the Nobel Prize in Literature. He was the first person of non-Western heritage to be awarded a Nobel Prize.
RRB JE ECE (CBT I) Mock Test- 8 - Question 68

Iltutmish established a centre of learning at:

RRB JE ECE (CBT I) Mock Test- 8 - Question 69

The Tapti river rises from the—

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 69 Mahadev hills

The Tapti River is one of the major rivers of peninsular India with a length of around 724 kilometres (450 mi). It is one of only three rivers in peninsular India that run from east to west - the others being the Narmada River and the Mahi River. The river rises in the eastern Satpura Range of southern Madhya Pradesh state, and flows westward, draining Madhya Pradesh's Nimar region, Maharashtra's Khandesh and east Vidarbha regions in the northwest corner of the Deccan Plateau and south Gujarat, before emptying into the Gulf of Cambay of the Arabian Sea, in the Surat District of Gujarat. The river, along with the northern parallel Narmada River, form the boundaries between North and South India. The Western Ghats or Sahyadri range starts south of the Tapti River near the border of Gujarat and Maharashtra. The Tapti (Tapi) River empties into the Gulf of Khambhat near the city of Surat in Gujarat.

RRB JE ECE (CBT I) Mock Test- 8 - Question 70

World Tsunami Awareness Day being observed on ____.

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 70 World Tsunami Awareness Day is being observed today across the world, including Pakistan, aiming at minimizing the number of people affected by disasters worldwide.
RRB JE ECE (CBT I) Mock Test- 8 - Question 71

Where was the 46th “Know India Programme” in March, 2018 held?

RRB JE ECE (CBT I) Mock Test- 8 - Question 72

In the case of spherical mirrors, the focal length is _______ of its radius of curvature image.

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 72 In case of spherical mirrors, focal length is half its radius of curvature image. Radius curvature of a mirror is defined as the radius of that sphere of which the mirror forms a part.
RRB JE ECE (CBT I) Mock Test- 8 - Question 73

Lemon contains Citric acid in the same way Vinegar contain ___________.

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 73

RRB JE ECE (CBT I) Mock Test- 8 - Question 74

When a pendulum is at either side of the peak in its oscillation, its potential energy is _______ while kinetic energy is _______.

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 74 During the oscillatory motion of a pendulum, energy balance is as follows-

The peak position: its potential energy is maximum while kinetic energy is minimum

The middle rest position: its potential energy is minimum while kinetic energy is maximum

RRB JE ECE (CBT I) Mock Test- 8 - Question 75

_______ are a species of plant which are adapted to life in a dry or physiologically dry habitat.

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 75 Xerophytes are the plant species adapted to life in a dry or physiologically dry habitat like salt marsh, saline soil desert or ice-covered areas by means of mechanisms to prevent water loss or to store available water.

Examples Cacti, Pineapple, Pine trees etc

RRB JE ECE (CBT I) Mock Test- 8 - Question 76

Which of the following are examples of polymers?

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 76 Polymer is any useful chemical made of many repeating units- either 1-dimensional, 2-dimensional or 3-dimensional called monomers.

Nylon, Polyvinyl Chloride & Teflon are all examples of polymers extremely useful in everyday life.

RRB JE ECE (CBT I) Mock Test- 8 - Question 77

Which of the following are examples of Natural Gas Liquids?

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 77 Propane - lower boiling point

-Used for central heating, cooking

- Transport fuel and numerous commercial applications.

- Chemical formulae: C3H8

Butane - used mainly in cylinders for portable applications in home

- For leisure activities such as boats, caravans and barbecues.

- Used as a propellant, refrigerant or to fuel torches

- Chemical formulae: C4H10

RRB JE ECE (CBT I) Mock Test- 8 - Question 78

Glucose, essential to a living being, has a molecular formula of ____________.

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 78 Glucose molecular formulae: C6H12O6

Glucose comes from foods which are rich in carbohydrates, like rice, bread, potatoes etc. Glucose is released when enzymes act on the food passage through the oesophagus to the stomach.

RRB JE ECE (CBT I) Mock Test- 8 - Question 79

Nephron is the functional unit of the__________ in the human body.

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 79 Nephron is the functional unit of the kidney. It performs the function of-

Producing urine in the process of removing waste in the body and excess substances from the blood.

There are over a million nephrons present in each human kidney.

RRB JE ECE (CBT I) Mock Test- 8 - Question 80

Kirchhoff's 1st law states that current flowing into a node (or a junction) must be _____________to current flowing out of it.

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 80 Kirchhoff's 1st law states that, At any junction in a circuit, the sum of the currents arriving at the junction must be equal to the sum of the currents leaving the junction.

Or The algebraic sum of currents in a network of conductors meeting at a point is zero.

RRB JE ECE (CBT I) Mock Test- 8 - Question 81

Atomic Number of Carbon is _______whereas its Mass number is ______.

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 81 Carbon atomic no.: 6; Mass No.: 12

Carbon is one of the most abundant elements commonly found in all living organisms. It contains 6 protons in the nucleus as well as 6 neutrons.

RRB JE ECE (CBT I) Mock Test- 8 - Question 82

New blood cells in the human body are produced in __________.

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 82 Bone marrow is the spongy tissue inside the hip and thigh bones containing immature stem cells that produces blood cells
  • Bone marrow produces almost 200 bn new red blood cells every day, along with white blood cells and platelets essential to the human body

  • Red blood cells (erythrocytes) help in transportation of oxygen around the body

  • White blood cells (leukocytes) help fight infection and diseases

RRB JE ECE (CBT I) Mock Test- 8 - Question 83

A sitar changes __________ energy to _______ energy whereas a microphone changes ___________ energy to ____________ energy.

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 83 A sitar changes mechanical energy while strumming to produce sound energy whereas a microphone changes the supplied sound energy to electrical energy for amplification.
RRB JE ECE (CBT I) Mock Test- 8 - Question 84

Which of the following are true regarding Geosynchronous satellites?

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 84 At any given inclination, a geosynchronous orbit synchronizes with the rotation of the Earth taking the exact time of rotation as of the earth. An observer on the ground would see the satellite as if it's in a fixed position without movement.This makes geosynchronous satellites particularly useful for telecommunications and other remote sensing applications.
RRB JE ECE (CBT I) Mock Test- 8 - Question 85

Which of the following statements are true regarding the element, SODIUM?

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 85 Sodium (Na): Atomic No.: 11; Atomic Mass: 22.9 g.mol-1 ;

- Highly reactive and low melting point

- Used in manufacturing of glass, soap etc.

Sodium is the 6th most abundant element in Earth's crust.

RRB JE ECE (CBT I) Mock Test- 8 - Question 86

Sun, stars, electric bulbs are examples of _________ bodies whereas moons, trees, rocks are examples of ___________ bodies.

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 86 Luminous bodies: Objects which emit light on their own. Example- Sun, stars, electric bulbs.

Non-Luminous bodies- Objects that do not emit light on their own but can be seen when light falls on them. Example- moons, trees, rocks etc.

Transparent- Objects which allow the majority of light rays to pass through them. Example- Glass

RRB JE ECE (CBT I) Mock Test- 8 - Question 87

How much electrical charge passes through an electrical appliance with a resistance of 50 ohm and a power consumption of 1800 watts.

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 87 Power equation: P= I2R; P- Power consumption, I- electrical charge, R- Resistance

According to the question,

: P= I2R

Or 1800 = I2 x 50

Or I= 6 Ampere

RRB JE ECE (CBT I) Mock Test- 8 - Question 88

An _____________ process is one in which no heat is gained or lost by the system.

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 88 In physics, an adiabatic process is a thermodynamic process in which there is no heat transfer into or out of a system and is generally obtained by surrounding the entire system with a strongly insulating material or by carrying out the process so quickly that there is no time for a significant heat transfer to take place

An isothermal process is a thermodynamic process in which the temperature of a system remains constant. The transfer of heat into or out of the system happens so slowly that thermal equilibrium is maintained.

An isobaric process is one where the pressure of the system (often a gas) stays constant in the thermodynamic system.

An isochoric process is a thermodynamic process in which the volume remains constant.

RRB JE ECE (CBT I) Mock Test- 8 - Question 89

A body with an initial velocity of 10 m/s gets displaced 9 m while moving with an acceleration of 2 m/sec2. What is the final velocity?

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 89 The velocity-displacement equation for a body moving with constant acceleration is V2= U2-2aS

U= Initial velocity, V= final velocity, a= acceleration and S= displacement

Putting the value in the equation we get,

V2 = 102 - 2*2*9

V2 = 64

Or V = 8 m/s2

RRB JE ECE (CBT I) Mock Test- 8 - Question 90

___________ are fibrous indigestible substance that are essential in human diet for aiding digestion

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 90 Roughages are a fibrous indigestible compound that the human body can't absorb. It aids in the passage of food and waste products through the digestive system.

Roughages are beneficial to the overall health of a human body.

Fibre is found in many fruits, vegetables, grains and legumes, nuts and seeds.

RRB JE ECE (CBT I) Mock Test- 8 - Question 91

S.I. The unit for acceleration is ________.

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 91

RRB JE ECE (CBT I) Mock Test- 8 - Question 92

Chemical elements which belong to the group 18 of the periodic table are called___________.

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 92 Noble gases are the chemical elements which belong to group 18 of the periodic table.

The elements are- helium, neon, argon, krypton, xenon, and radon.

Having optimum valence electrons in their outer shell, they are the most stable elements found in the environment.

RRB JE ECE (CBT I) Mock Test- 8 - Question 93

Statement: Refrigerators work on the principle of reverse heat engine.

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 93 Reverse heat engine is a device that transfers energy from an object at a lower temperature to an object at a higher temperature by doing work on the system which is essentially reverse of the process that takes place inside a heat engine, in which energy flows from a higher to a lower temperature and work is generated as a result.

Refrigerators and Air conditioners are typical examples of reverse heat engines.

Efficiency does not play any role in the simple working of any of these processes.

RRB JE ECE (CBT I) Mock Test- 8 - Question 94

Which of the following is the semi fluid substance upon which organelles of the animal cell are found?

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 94 Cytoplasm is the semi fluid substance enclosed within the cell membrane of an animal cell.

Its constituents are- water (80 - 85%), proteins (10 - 15%), lipids (2 - 4%) and rest are polysaccharides and nucleic acids.

All the organelles like Ribosomes, Mitochondria, golgi apparatus etc. are found in this.

RRB JE ECE (CBT I) Mock Test- 8 - Question 95

Alexander Fleming was a Scottish physician & pharmacologist who is best known for his discovery of ________.

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 95 In 1928 Alexander Fleming discovered penicillin, and after successful decades of its vital use and importance received the Nobel Prize in Medicine in 1945.

Fleming's discovery of penicillin occurred in 1928, while he was investigating a common type of bacteria that causes boils and infections in patients with weakened immune systems.

RRB JE ECE (CBT I) Mock Test- 8 - Question 96

Bronchitis is an ailment related to which of the following internal organs of the Human body?

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 96 Bronchitis occurs when bronchial tubes, which essentially carry air to the lungs in the human system, gets infected and swollen causing a massive build-up of mucus

Same viruses that cause colds or the flu also cause bronchitis.

RRB JE ECE (CBT I) Mock Test- 8 - Question 97

Which of the following processes take place in a blast furnace in a metallic extraction industry?

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 97 Smelting is a process to mix and melt metallic ores in order to control the pure metallic content according to specification in an industry.

Soldering is a process in which two or more metal items are joined together by melting and then flowing a filler metal into the joint - the filler metal having a relatively low melting point. Soldering is used to form a permanent connection between electronic components.

Forging is an after-extraction process where metal is given its desired shape.

RRB JE ECE (CBT I) Mock Test- 8 - Question 98

_____________ is the act or process of making soap.

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 98 Saponification is an organic chemical reaction utilized to make soap.

Saponification is a process by which triglycerides are reacted with sodium or potassium hydroxide (lye) to produce glycerol and a fatty acid salt, called "soap."

There are 2 compounds involved in this process- Fat and an Alkali.

RRB JE ECE (CBT I) Mock Test- 8 - Question 99

Which of the following is a 2-terminal diode which stores electrical energy and is used in everyday appliances?

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 99 The capacitor is made of two closely placed conducting plates which are separated by a dielectric material.

The plates accumulate electric charge when connected to the power source. One plate accumulates the positive charge and the other plate accumulates negative charge.

The capacity of a capacitor to store electrical energy is called Capacitance.

RRB JE ECE (CBT I) Mock Test- 8 - Question 100

Which of the following is responsible for the floating of the brain in the Human skull?

Detailed Solution for RRB JE ECE (CBT I) Mock Test- 8 - Question 100 In the human skull, the brain "floats" in the cerebrospinal fluid. It is found within the skull and spine. This cushioning fluid is produced by the choroid plexus tissue, which is located within the brain, and flows through a series of cavities (ventricles) out of the brain and down along the spinal cord.

The cerebrospinal fluid is kept separate from the blood supply by the blood-brain barrier

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