CISF Constable Mock Test - 8 - Defence MCQ

# CISF Constable Mock Test - 8 - Defence MCQ

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## 100 Questions MCQ Test - CISF Constable Mock Test - 8

CISF Constable Mock Test - 8 for Defence 2024 is part of Defence preparation. The CISF Constable Mock Test - 8 questions and answers have been prepared according to the Defence exam syllabus.The CISF Constable Mock Test - 8 MCQs are made for Defence 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for CISF Constable Mock Test - 8 below.
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CISF Constable Mock Test - 8 - Question 1

### Find the next image in the following series.

Detailed Solution for CISF Constable Mock Test - 8 - Question 1

The pattern followed here is:
From one to the next, the figure is rotating in the clockwise direction.
Hence, figure given in option 1 will complete the following series.

CISF Constable Mock Test - 8 - Question 2

### In a certain code language, PART is written as QDQQ. How is SOAK written in that code language?

Detailed Solution for CISF Constable Mock Test - 8 - Question 2

The pattern followed here is:

Same pattern will be followed for SOAK.

Hence, SOAK will be coded as TRZH.

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CISF Constable Mock Test - 8 - Question 3

### Find the wrong term in the following series. 56, 70, 65, 78, 72, 86

Detailed Solution for CISF Constable Mock Test - 8 - Question 3

The pattern followed here is:
56 + 14 = 70
70 – 6 = 64 ≠ 65
64 + 14 = 78
78 – 6 = 72
72 + 14 = 86
In place of 65, there should be 64 to make the series logically correct.
Hence, ‘65’ is the correct alternative.

CISF Constable Mock Test - 8 - Question 4

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

Leatherworker : Leather : : ? : Iron

Detailed Solution for CISF Constable Mock Test - 8 - Question 4

Leatherworker is a person who makes things from leather. Similarly, blacksmith is a person who makes things from iron.
Hence, ‘Blacksmith’ is the correct alternative.

CISF Constable Mock Test - 8 - Question 5

In the following question, select the related letters/ numbers from the given alternatives.

QH54P : SK45T : : NS36X : ?

Detailed Solution for CISF Constable Mock Test - 8 - Question 5

The pattern is as follows:

Same pattern will be followed for ‘NS36X : ?’.

Hence, ‘PV63B’ is the correct alternative.

CISF Constable Mock Test - 8 - Question 6

Find the missing term in the following series.

48, 50, 57, 85, 148, ?

Detailed Solution for CISF Constable Mock Test - 8 - Question 6

The pattern followed here is:
48 + (13 + 1) = 48 + 2 = 50
50 + (23 - 1) = 50 + 7 = 57
57 + (33 + 1) = 57 + 28 = 85
85 + (43 - 1) = 85 + 63 = 148
148 + (53 + 1) = 148 + 126 = 274
Hence, ‘274’ will complete the given series.

CISF Constable Mock Test - 8 - Question 7

Which one set of letters when sequentially placed at the gaps in the given letter series shall complete it?

w_ k _ _ h _ m w h _ _

Detailed Solution for CISF Constable Mock Test - 8 - Question 7

1) hmwkhm → whkm / whkm /whhm
2) hmwkkm → whkm / whkm /whkm
3) hmwmkm → whkm / whmm /whkm
4) hmwkmm → whkm / whkm /whmm
Hence, ‘hmwkkm’ is the correct alternative.

CISF Constable Mock Test - 8 - Question 8

In the following question, select the related image from the given alternatives.

Detailed Solution for CISF Constable Mock Test - 8 - Question 8

The pattern followed here is:
Circle moves 2 steps in anti-clockwise direction.
Line segment moves 2 stepsin clockwise direction.
Figure in between remains the same i.e., triangle.
Semicircle moves 2 stepsin clockwise direction.
Hence, figure given in option 1 is the correct one.

CISF Constable Mock Test - 8 - Question 9

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

Detailed Solution for CISF Constable Mock Test - 8 - Question 9

Here, all except Ghoomar are folk paintings while Ghoomar is a folk dance.
Hence, ‘Ghoomar’ is the odd one.

CISF Constable Mock Test - 8 - Question 10

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

Detailed Solution for CISF Constable Mock Test - 8 - Question 10

Consider the English alphabetical series for the numerical value of letters.
1) CINR → C + 6 = I, I + 5 = N, N + 4 = R
2) RXCG → R + 6 = X, X + 5 = C, C + 4 = G
3) BHMQ → B + 6 = H, H + 5 = M, M + 4 = Q
4) FLQV → F + 6 = L, L + 5 = Q, Q + 4 = U ≠ V
Hence, ‘FLQV’ is the odd one.

CISF Constable Mock Test - 8 - Question 11

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

Detailed Solution for CISF Constable Mock Test - 8 - Question 11

The pattern followed here is:
In all except option 3, each has circle inserted inside the other figure.
Hence, option 3 is the odd one.

CISF Constable Mock Test - 8 - Question 12

If “KHATRON” is coded as “87” then how will “KHILADI” be coded as?

Detailed Solution for CISF Constable Mock Test - 8 - Question 12

The pattern followed here is:
K + H + A + T + R + O + N = 11 + 8 + 1 + 20 + 18 + 15 + 14 = 87
Same pattern will be followed for KHILADI.
K + H + I + L + A + D + I = 11 + 8 + 9 + 12 + 1 + 4 + 9 = 54
Hence, KHILADI will be coded as 54.

CISF Constable Mock Test - 8 - Question 13

In the Following Question, Select the related word from the given alternatives.

Q. Chail Cricket Ground : India : : Angel Falls : ?

Detailed Solution for CISF Constable Mock Test - 8 - Question 13

Chail Cricket Ground is in India whileAngel Falls is in Venezuela.
Hence, ‘Venezuela’ is the correct alternative.

CISF Constable Mock Test - 8 - Question 14

Direction: Study the following information carefully and answer the question based on it.
If A # B: B is 5 km to the right of A.
If A \$ B: B is 5 km to the south of A.
If A @ B: B is 5 km to the left of A.
If A % B: B is 5 km to the north of A.
Assume that the first person is facing towards north.

Q. If J @ K % M % L # W, How far is W with respect to J?

Detailed Solution for CISF Constable Mock Test - 8 - Question 14

The diagram for the given direction problem is as follows:

Hence, W is 10 km far with respect to J.

CISF Constable Mock Test - 8 - Question 15

Direction: Study the following information carefully and answer the question based on it.
If A # B: B is 5 km to the right of A.
If A \$ B: B is 5 km to the south of A.
If A @ B: B is 5 km to the left of A.
If A % B: B is 5 km to the north of A.
Assume that the first person is facing towards north.

Q. If M % N @ O \$ P, in which direction is P with respect to M?

Detailed Solution for CISF Constable Mock Test - 8 - Question 15

The diagram for the given direction problem is as follows:

Hence, P is in west direction with respect to M.

CISF Constable Mock Test - 8 - Question 16

In the following question, from the given alternative words, select the word which CAN be formed using the letters of the given word.

DEMONETISATION

Detailed Solution for CISF Constable Mock Test - 8 - Question 16

The word ‘Dominant’ can be formed using the letters of the word ‘DEMONETISATION’ because all letters of the word ‘Dominant’ are present in the word ‘DEMONETISATION’.
Hence, ‘Dominant’ is the correct alternative.

CISF Constable Mock Test - 8 - Question 17

In the following equation, by using which mathematical operators will the expression become correct?

3 ? 1625 ÷ 5 × 2 + 68 - 41 = 680

Detailed Solution for CISF Constable Mock Test - 8 - Question 17

Given equation: 3 ? 1625 ÷ 5 × 2 + 68 - 41 = 680
Let’s check each option:

1) Using option → ×
3 × 1625 ÷ 5 × 2 + 68 – 41
= 3 × 325 × 2 + 68 – 41
= 1950 + 68 – 41
= 1977

2) Using option → +
3 + 1625 ÷ 5 × 2 + 68 – 41
= 3 + 325 × 2 + 68 – 41
= 3 + 650 + 68 – 41
= 680

3) Using option → -
3 - 1625 ÷ 5 × 2 + 68 - 41
= 3 - 325 × 2 + 68 - 41
= 3 - 650 + 68 - 41
= -620
Thus, by using option 2 i.e., + we will get the correct answer.

CISF Constable Mock Test - 8 - Question 18

If 8th February of any ordinary non leap year is Tuesday, then what will be the day on 24th May of that year?

Detailed Solution for CISF Constable Mock Test - 8 - Question 18

Number of days from 8th February to 24th May:
February = 20
March = 31
April = 30
May = 24
Total days = 105 (0 odd days)
Hence, 24th May will be on Tuesday.

CISF Constable Mock Test - 8 - Question 19

Find the pattern in the given question and mark the answer with the same pattern?

(168, 47)

Detailed Solution for CISF Constable Mock Test - 8 - Question 19

Multiply the last two digits of first number and subtract the first digit from resultant.
i.e., (168, 47) → (8 × 6) – 1 = 48 – 1 = 47
Let’s check each option.
1) (238, 21) → (8 × 3) – 2 = 24 – 2 = 22 ≠ 21
2) (544, 80) → (4 × 4) – 5 = 16 – 5 = 11 ≠ 80
3) (538, 19) → 8 × 3 – 5 = 24 – 5 = 19
4) (634, 18) → 4 × 3 – 6 = 6 ≠ 18
Hence, (538, 19) is the correct alternative.

CISF Constable Mock Test - 8 - Question 20

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

Detailed Solution for CISF Constable Mock Test - 8 - Question 20

Subtract the first and second number (row wise) and reverse the obtained number to the third one.
24 – 16 = 08 → Reverse of 08 = 80
12 – 8 = 04 → Reverse of 04 = 40
16 – 5 = 11 → Reverse of 11 = 11
Hence, 40 is the missing term.

CISF Constable Mock Test - 8 - Question 21

Two positions of a cubical dice is shown below.

If \$ is at the top, which symbol will be at the bottom?

Detailed Solution for CISF Constable Mock Test - 8 - Question 21

Here, opposite faces are:
% is placed at the same position in both the cubes which implies that ‘@ and #’ and ‘& and *’ are opposites.
Thus,if \$ is at the top, % will be at the bottom.

CISF Constable Mock Test - 8 - Question 22

Six friends – H, I, J, K, L and M are sitting around a circular table facing the centre. J is sitting 2nd to the right of L who is sitting adjacent to K. K is 3rd to the left of M. H is exactly sitting between M and J.

Q. Who is sitting at 5th position to the right of J?

Detailed Solution for CISF Constable Mock Test - 8 - Question 22

Diagram for the circular arrangement is as follows:

Hence, K is sitting 5th to the right of J.

CISF Constable Mock Test - 8 - Question 23

Which one of the given responses would be a meaningful order of the following?
1. Standards
2. Comparison
3. Measure
5. Corrective action

Detailed Solution for CISF Constable Mock Test - 8 - Question 23

The logical sequence (of controlling process) is as follows:
1. Standards
3. Measure
2. Comparison
5. Corrective action
Hence, ‘1, 3, 2, 5, 4’ is correct alternative.

CISF Constable Mock Test - 8 - Question 24

In the following figure, set A represents kind people, set B represents caring people and set C represents innocent people.
If whole set B contains 19 people and there are 5 people who are caring and innocent, 6 people who are kind and caring and only 2 people have all the three characteristics.
Find the number of people who are caring only.

Detailed Solution for CISF Constable Mock Test - 8 - Question 24

Required number = B – (BC + AB + ABC)
= 19 – (5 + 6 + 2)
= 19 – 13
= 6
Hence, there are 6 persons who are only caring.

CISF Constable Mock Test - 8 - Question 25

Monika told her classmate (pointing towards Ram), “He is my mother’s brother's child.”
Find, how Ram is related to Monika’s mother’s father.

Detailed Solution for CISF Constable Mock Test - 8 - Question 25

Based on the given data, we can draw the following family tree:

Hence, Ram is the grandson of Monika’s mother’s father.

CISF Constable Mock Test - 8 - Question 26

Which of the following is/are the famous works of Mahesh Elkunchwar?
1.Sultan
2.Nirmala
3.Garbo

Detailed Solution for CISF Constable Mock Test - 8 - Question 26
• Eminent Indian playwright, Mahesh Elkunchwar has been chosen for the Mahindra Excellence in Theatre Awards (META) Lifetime Achievement Award 2019.
• The award will be given on 12 March 2019.
• He is a recipient of the Sangeet Natak Akademi Fellowship and has over 30 plays and essays to his credit including works like 'Sultan', 'Holi', 'Garbo', 'Yatanaghar', and 'Atmakatha'.
CISF Constable Mock Test - 8 - Question 27

When is the World Wildlife Day observed every year?

Detailed Solution for CISF Constable Mock Test - 8 - Question 27
• The World Wildlife Day is observed every year on 3 March.
• The theme for 2019 is 'Life below water: for people and planet'.
• The aim of the day is to celebrate and raise awareness of the world's wild fauna and flora.
• On this day, the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES) was adopted.
CISF Constable Mock Test - 8 - Question 28

Where did PM Narendra Modi launch 'One Nation One Card' on 4 March 2019?

Detailed Solution for CISF Constable Mock Test - 8 - Question 28
• PM Narendra Modi launched 'One Nation One Card' in Ahmedabad on 4 March 2019.
• It can be used for paying for travel on any mode of transportation.
• It will enable people to use them either in PoS machines deployed at ticket counters or just use them like Metro Rail smart cards to enter a platform.
CISF Constable Mock Test - 8 - Question 29

The famous “Brandenburg Gate” is located in which of the following cities?

Detailed Solution for CISF Constable Mock Test - 8 - Question 29

CISF Constable Mock Test - 8 - Question 30

Who among the following was the first Secretary General of the United Nations?

Detailed Solution for CISF Constable Mock Test - 8 - Question 30
• Trygve Lie was the first Secretary General of the United Nations.
• He served for the period of 6 years i.e, 1946 to 1952.
• Antonio Guterres is the current Secretary‑General of the United Nations.
• The headquarters of the UN is in Manhattan, New York City.
CISF Constable Mock Test - 8 - Question 31

Who was the first miss world titleholder?

Detailed Solution for CISF Constable Mock Test - 8 - Question 31
• Kiki Hakansson is a Swedish model and holds the title of Miss Sweden World.
• In 1951, Kiki became the first Miss World pageant.
CISF Constable Mock Test - 8 - Question 32

The Scientific Society of Aligarh was founded in the year ________.

Detailed Solution for CISF Constable Mock Test - 8 - Question 32

• The Scientific Society of Aligarh was founded by Sir Syed Ahmed Khan in the year 1864.

• He founded the society on the lines of the Royal Society of London to promote scientific knowledge among Muslims of India.

• He was also the founder of The Mohammedan Anglo-Oriental College in the year 1875 which later developed into Aligarh Muslim University.

CISF Constable Mock Test - 8 - Question 33

The Revolt of 1857 was described as 'A National Rising' by ________.

Detailed Solution for CISF Constable Mock Test - 8 - Question 33
• A leader of a Conservative Party, Benjamin Disraeli remarked the Revolt of 1857 as a national rising.
• He was a British statesman, who not only once, but served as a Prime Minister of United Kingdom, twice.
• Disraeli was born in London and was a well-known figure who was famous for his stiff policies.
CISF Constable Mock Test - 8 - Question 34

Who discovered the nucleus for the first time in cell?

Detailed Solution for CISF Constable Mock Test - 8 - Question 34
• Nucleus of a cell was discovered by Robert Brown in 1831.
• He is perhaps best known for his discovery of the random movement of microscopic particles in a surrounding solution, later referred to as Brownian motion.
• Nucleus of an atom was discovered by Ernest Rutherford's.
CISF Constable Mock Test - 8 - Question 35

Which of the following key combinations is used to open Windows Task Manager?

Detailed Solution for CISF Constable Mock Test - 8 - Question 35
• Ctrl + Shift + Esc are used to open Windows Task Manager.
• It is a task manager, system monitor, and startup manager which is included with Microsoft Windows systems.
CISF Constable Mock Test - 8 - Question 36

The speed of the rotation of earth is minimum at

Detailed Solution for CISF Constable Mock Test - 8 - Question 36

The Earth rotates around an invisible line known as its axis, which extends from its top, the North Pole, through its centre and to the bottom, or South Pole. As the Earth is a sphere, it is widest at the equator, becoming increasingly narrow further toward its top and bottom. This means that the Earth’s circumference, or distance around, is greatest at the equator, lessening with higher latitudes until it becomes nonexistent at the poles. Hence the speed is minimum at the poles.

CISF Constable Mock Test - 8 - Question 37

What is nature of pH of Milk?

Detailed Solution for CISF Constable Mock Test - 8 - Question 37

Milk is slightly acidic as it has a pH of around 6.5 to 6.7. According to some sources milk is cited as neutral since it is so close to the neutral pH of 7.0.

CISF Constable Mock Test - 8 - Question 38

Which of the following statement is Not true regarding electromagnets?

Detailed Solution for CISF Constable Mock Test - 8 - Question 38
• Electromagnets are a type of magnet that produce magnetic field when electric current is passed through them.
• Therefore, when the current is turned off, it loses its magnetism.
• Electromagnets are used in electric motors.
CISF Constable Mock Test - 8 - Question 39

Find the potential energy gained by a body of mass 25 kg, if it is raised by 5 m. (use g = 10 m/s2)

Detailed Solution for CISF Constable Mock Test - 8 - Question 39

The gravitational potential energy of an object is the 'stored energy' that the object has by being at that height. This is equivalent to its mass times the force of gravity, ‘g’ times the height of the object. This means following is the formula:
Potential energy = mass × gravity × height.
Potential Energy = 25 × 10 × 5 = 1250 J

CISF Constable Mock Test - 8 - Question 40

Which one among the following is known as 'animal starch'?

Detailed Solution for CISF Constable Mock Test - 8 - Question 40
• In animals, the structurally similar glucose polymer is the more densely branched glycogen, which is called "animal starch".
• Starch obtained by animals from plants is stored in the animal body as glycogen.
• Digestion processes in both plants and animals convert starch to glucose, which is the main source of energy.
• The primary reserve of the animal kingdom is polysaccharide. It is found in the muscles, livers cells of animals, Because of its close relationship to starch, it is commonly called animal starch.
• Glycogen is a non-reducing, white, inconsistent polysaccharide that dissolves easily in cold water.
CISF Constable Mock Test - 8 - Question 41

Which of the following is the largest animal in the world?

Detailed Solution for CISF Constable Mock Test - 8 - Question 41

The Blue Whale is a marine mammal belonging to the suborder of baleen whales.

• It is 30 metres (98 ft) in length and 180 metric tons (200 short tons) or more in weight and considered as the largest known animal to have ever existed in the world.
• The Blue Whale’s tongue weighs around 2.7 metric tons (5,952 pounds), about the size of an average Asian Elephant and its heart weighs about 600 kg (1,300 lb) and is the largest known in any animal.
• Not only is the heart similar size to a mini-cooper car but also comparable in weight.
• The Blue Whale to feed on small, shrimp-like creatures called Krill.
CISF Constable Mock Test - 8 - Question 42

The outer part of coconut is made up of which tissue?

Detailed Solution for CISF Constable Mock Test - 8 - Question 42

The outer part of coconut is made up of the sclerenchyma tissue. The cells of this tissue are dead. They are rigid, contain thick and lignified secondary walls. Their main function is to provide strength and support to parts of the plant.

CISF Constable Mock Test - 8 - Question 43

Severe menstrual cramping is a disease which is also known as?

Detailed Solution for CISF Constable Mock Test - 8 - Question 43
• Literally translates to “difficult monthly flow”, dysmenorrhoea is severe menstrual cramping experienced by women during periods.
• These cramps are a result of excessively strong uterine contractions.
• It is of two types:

Primary dysmenorrhoea - Menstrual pain that is due menstruation and is not related to any underlying gynaecologic disorder.
Secondary dysmenorrhoea - Menstrual pain that is a symptom of some gynaecologic disorder.

CISF Constable Mock Test - 8 - Question 44

Adam’s apple is formed by _______ and it is a part of _______.

Detailed Solution for CISF Constable Mock Test - 8 - Question 44
• The thyroid cartilage is the interior portion of larynx situated over the trachea.
• It protrudes in males and is called Adam's apple. The larynx is a soundbox that produces sound vibrations with the help of vocal cords.
• The larynx is situated over the trachea and is guarded by epiglottis.
CISF Constable Mock Test - 8 - Question 45

With which country did India conduct the 3rd edition of the bilateral joint exercise, Al Nagah 2019?

Detailed Solution for CISF Constable Mock Test - 8 - Question 45
• The 3rd edition of the bilateral joint exercise between India and Oman, Al Nagah 2019 will begin from 12 March 2019 at Jabel Al Akhdar Mountains in Oman.
• It will continue till 25th of March and both the armies will exchange expertise and experience in tactics, weapon handling, and firing.
• The aim of this exercise is to enhance interoperability in counter-terrorist operations.
• The capital of Oman is Muscat
CISF Constable Mock Test - 8 - Question 46

The term 'Laissez Faire' is mainly associated with which among the following?

Detailed Solution for CISF Constable Mock Test - 8 - Question 46
• The term ' Laissez Faire' is used in order to denote the capitalist type of economy.
• It means that the economy is market-based and there is no role of the government in this kind of economy.
• In case of a socialist economy, all the means of production and distribution are controlled by the government.
• In the mixed economy, there are characteristics of both the capitalist economy and the socialist economy.
• India is an example of mixed economy whereas US and China are the examples of capitalist and socialist economies respectively.
CISF Constable Mock Test - 8 - Question 47

Consider the following states / UT and their judicial capitals in India.
II. Dadra and Nagar Haveli: Delhi
III. Gujarat: Gandhinagar
Which among the above is/are correctly matched?

Detailed Solution for CISF Constable Mock Test - 8 - Question 47

CISF Constable Mock Test - 8 - Question 48

From where will India launch its communication satellite, GSAT-31, on 6 February 2019?

Detailed Solution for CISF Constable Mock Test - 8 - Question 48
• India will launch its communication satellite, GSAT-31, on 6 February 2019 from French Guiana.
• The satellite will be launched by European launch services provider Arianespace's launch vehicle named Ariane-5.
• GSAT-31 will be used for supporting VSAT networks, Television uplinks, Digital Satellite News Gathering, DTH-television services.
• GSAT-31 is India’s 40th communication satellite.
CISF Constable Mock Test - 8 - Question 49

The Netaji Subhash Chandra Bose museum was inaugurated in which city?

Detailed Solution for CISF Constable Mock Test - 8 - Question 49
• Prime Minister Narendra Modi inaugurated the Netaji Subhash Chandra Bose museum at the Red Fort in Delhi on 23 January 2019.
• The museum showcases various artefacts related to Subhash Chandra Bose and Indian National Army.
• The Foundation stone of the museum was laid during the celebrations of the 75th anniversary of Azad Hind Government in October 2018.
CISF Constable Mock Test - 8 - Question 50

On which river was a 5.1-km long cable-stayed bridge named 'Atal Setu' inaugurated on 27 January 2019?

Detailed Solution for CISF Constable Mock Test - 8 - Question 50
• A 5.1-km long cable-stayed bridge named 'Atal Setu' on the Mandovi river was inaugurated in Goa on 27 January 2019.
• The bridge was constructed by the Goa Infrastructure Development Corporation and Larsen and Toubro.
• The bridge has 88 high tensile strength cables in the state-of-art single place harp type cable stay system and a real-time force monitoring mechanism.
CISF Constable Mock Test - 8 - Question 51

The population of a town increases at the rate of 10% per annum. If the present population of the town is 266200, then what was the population 3 years ago

Detailed Solution for CISF Constable Mock Test - 8 - Question 51

Let,
Population 3 years ago = x
Increase in population per annum = 10%
⇒ Population after 3 year = (1.10) (1.10) (1.10) x = 1.331x
Population after 3 year = 266200
⇒ 1.331x = 266200
∴ x = 266200 /1.331 = 200000

CISF Constable Mock Test - 8 - Question 52

Two pipes A and B can alone fill a tank in 40 minutes and 60 minutes respectively. Pipe C can alone empty the same tank in 120 minutes. If all three pipesare opened together, then in how many minutes will the tank be filled

Detailed Solution for CISF Constable Mock Test - 8 - Question 52

Pipe A can fill the tank in = 40 min
∴ In 1 min A can fill = 1/40
Pipe B can fill the tank in = 60 min
∴ In 1 min B can fill = 1/60
Pipe C can empty the tank in = 120 min
∴ In 1 min C can empty = 1/120
Let, they together can fill the tank in = x min
According to problem,

⇒ 4x = 120
⇒ x = 30
∴ They together can fill the tank in 30 min

CISF Constable Mock Test - 8 - Question 53

A person goes from point L to N and comes back. His average speed for the whole journey is 100 km/hr. If his speed while coming back from N to L is 65 km/hr, then what will be the speed of the person (in km/hr) while going from L to N?

Detailed Solution for CISF Constable Mock Test - 8 - Question 53

Given,
Speed of person from point N to L = 65km/hr
Let Speed of person from point L to N be a km/hr.
Average speed for the whole journey = 100 km/hr.
If distance of whole journey is same then average speed of journey is =
⇒ 100 = (2 × a × 65)/(65 + a)
⇒ 6500 + 100a = 130a
⇒ 6500 = 30a
⇒ a = 6500/30
⇒ a = 216.67
∴ Speed of person from point L to N is 216.67 km/hr.

CISF Constable Mock Test - 8 - Question 54

0.02% of 150% of 600 is?

Detailed Solution for CISF Constable Mock Test - 8 - Question 54

0.02% of 150% of 600 = 600 × 1.5 × 0.0002 = 0.18

CISF Constable Mock Test - 8 - Question 55

What is the value of

Detailed Solution for CISF Constable Mock Test - 8 - 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, and in the bracket,
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.
Given expression is,

⇒ (57/7) + (38/7) + (30/7) + (22/7) = ?
⇒ ? = (57 + 38 + 30 + 22)/7
⇒ ? = 147/7
⇒ ? = 21

CISF Constable Mock Test - 8 - Question 56

The ratio of the angles of a triangle is 2 ∶ 3 ∶ 5. What is the measure of the smallest angle (in degrees)?

Detailed Solution for CISF Constable Mock Test - 8 - Question 56

Let the angles of the triangle be 2x, 3x and 5x respectively.
We know that,
Sum of angles in a triangle = 180°
⇒ 2x + 3x + 5x = 180°
⇒ 10x = 180
⇒ x = 18°
∴ The measure of the smallest angle = 2 × 18° = 36°

CISF Constable Mock Test - 8 - Question 57

Find the two numbers such that their mean proportion is 12 and the third proportion be 96.

Detailed Solution for CISF Constable Mock Test - 8 - Question 57

Let the two numbers be x and y
xy = 12= 144 ⇒ x = 144/y
x : y = y : 96
x × 96 = y2
144/y × 96 = y2
y3 = 144 × 96
⇒ y = 24
x = 144/24 = 6

CISF Constable Mock Test - 8 - Question 58

If four times a number exceeds its  by 484. Then what is that number?

Detailed Solution for CISF Constable Mock Test - 8 - Question 58

Let the required number be x
According to the question,
4x – 16x/5 = 484
⇒ 4x/5 = 484
⇒ x = 121 × 5 = 605
∴ The required number is 605

CISF Constable Mock Test - 8 - Question 59

A girl walking at the speed of 2 km/hr covers a certain distance in 7 hours 30 minutes. If she covers the same distance by cycle in 5 hours, then what is the speed (in km/hr) of cycle?

Detailed Solution for CISF Constable Mock Test - 8 - Question 59

⇒ If distance is constant, then the Speed is indirectly proportional to Time (Product of Speed and Time is constant
⇒ S1 × T= S2 × T2
⇒ 2 × 7.5 = S2 × 5
⇒ S= (2 × 7.5)/5 = 15/5 = 3 kmph
∴ Speed of the cycle = 3 kmph

CISF Constable Mock Test - 8 - Question 60

A sum of money at simple interest amounts to Rs. 1500 in 3 years and to Rs. 2000 in 5 years. The sum is:

Detailed Solution for CISF Constable Mock Test - 8 - Question 60

S.I. for 2 years = 2000 - 1500 = Rs. 500
S.I. for 1 year = Rs. 500/2 = Rs. 250
S.I. for 3 years = 3 × 250 = Rs. 750
Required sum = 1500 – 750 = Rs. 750

CISF Constable Mock Test - 8 - Question 61

In a mixture of 35 litres, the ratio of water and acid is 6 : 1. If 5 litres of acid is added to the mixture, then what will be the ratio of water and acid in the new mixture?

Detailed Solution for CISF Constable Mock Test - 8 - Question 61

Ratio of water and acid in initial mixture = 6 ∶ 1
Sum of ratios = 6 + 1 = 7
Quantity of acid in 35 litres of initial mixture = (1/7) × 35 = 5 litres
When 5 litres of acid is added in 35 litres of initial mixture,
Quantity of new mixture = 35 + 5 = 40 litres
Quantity of acid in new mixture = 5 + 5 = 10 litres
Quantity of water in new mixture = 40 – 10 = 30 litres
∴ Water-acid ratio in new mixture = 30 ∶ 10 = 3 ∶ 1

CISF Constable Mock Test - 8 - Question 62

A grain trader has 100 bags of rice. He sold some bags at 10% profit and rest at 20% profit. His overall profit on selling these 100 bags was 14%. How many bags did he sell at 20% profit?

Detailed Solution for CISF Constable Mock Test - 8 - Question 62

Let the amount of bags sold at 20% profit be x
The average profit = Weighted average of bags sold at 10% and 20% profit
⇒ 14 = [(100 – x) × 10 + x × 20]/100
⇒ 1400 = 1000 + 10x
⇒ 400 = 10
∴ x = 40

CISF Constable Mock Test - 8 - Question 63

A train of length 180 metres crosses a tree in 15 seconds and crosses another train of the same length travelling in opposite direction in 20 seconds. What is the speed (in km/hr) of the second train?

Detailed Solution for CISF Constable Mock Test - 8 - Question 63

Time taken to cross the tree = Length of train/Speed of train
⇒ Speed of train = 180/15 = 12 m/sec.
Let the speed of the second train be ‘x’ m/sec.
∵ The trains are moving in opposite directions, hence, their relative speed is the sum of their individual speeds
⇒ Relative speed = x + 12
Now,
Time taken to cross each other = Sum of lengths of trains/Relative speed
⇒ 20 = (180 + 180)/(x + 12)
⇒ x + 12 = 360/20
⇒ x = 18 - 12 = 6 m/sec.
∴ Speed of second train = 6 × 18/5 = 21.6 km/hr.

CISF Constable Mock Test - 8 - Question 64

What is the units digit of (311)51 × (25)36 ?

Detailed Solution for CISF Constable Mock Test - 8 - Question 64

Unit digit of 311n is always 1, where n is any natural number.
∴ Unit digit of 31151 is 1
Unit digits of 25n is always 5, where n is any natural number
∴ Unit digit of 2536 is 5
So, Unit digit of (311)51 × (25)36 is the same as the unit digit of (1 × 5)
∴ Unit digit of (311)51 × (25)36 = 5

CISF Constable Mock Test - 8 - Question 65

The 7th and 12th term of an arithmetic progression are -15 and 5 respectively. What is the 16th term?

Detailed Solution for CISF Constable Mock Test - 8 - Question 65

Let the first term of A.P. be a and let the difference be d
⇒ a + 6d = -15       ----(i)
⇒ a + 11d = 5       ----(ii)
Subtracting (i) from (ii)
⇒ 5d = 20
⇒ d = 4
Putting the value of d in (i)
⇒ a + 6 × 4 = -15
⇒ a = -15 - 24 = -39
So, 16th term = a + 15d = -39 + 15 × 4 = -39 + 60 = 21

CISF Constable Mock Test - 8 - Question 66

Which of the following statement is true?
I. (42)4 = 423423
II. 423423 > 46

Detailed Solution for CISF Constable Mock Test - 8 - Question 66

(42)4 = 65536 and 423423 = 65536
We can observe that
The statement I is True
423423 = 4= 65536 and 46 = 4096
We can observe that
Statement II is True.
Hence Both I and II are true.

CISF Constable Mock Test - 8 - Question 67

The difference between cost price and selling price is Rs. 12.54. If loss percentage is 33%, then what is the cost price (in Rs.)?

Detailed Solution for CISF Constable Mock Test - 8 - Question 67

Given that,
C.P - S.P = 12.54
Loss % = 33%
We know that,
Loss % = (C.P - S.P)/(C.P) × 100
⇒ 33 = (12.54)/(C.P) × 100
∴ C.P = (12.54)/33 × 100 = Rs. 38

CISF Constable Mock Test - 8 - Question 68

Average of 8 numbers is 40. The average of first three numbers is 46 and the average of next two numbers is 50. If the sixth number is 6 and 10 less than seventh and eighth number respectively, then what is the value of the eighth number?

Detailed Solution for CISF Constable Mock Test - 8 - Question 68

Sum of the 8 numbers = 8 × 40 = 320
Sum of first 3 numbers = 3 × 46 = 138
Sum of next two numbers = 2 × 50 = 100
Let the 6th number be ‘x
⇒ 7th number = x + 6
⇒ 8th number = x + 10
Hence,
⇒ 138 + 100 + x + x + 6 + x + 10 = 320
⇒ 3x = 320 – 254
⇒ x = 66/3 = 22
∴ The 8th number = 22 + 10 = 32

CISF Constable Mock Test - 8 - Question 69

The difference between simple and compound interests compounded annually on a certain sum of money for 2 years at 4% per annum is Rs. 10. The sum (in Rs.) is:

Detailed Solution for CISF Constable Mock Test - 8 - Question 69

Interest from simple interest = PRT/100
The formula for CI at annual compound interest, including principal sum, is:
Where:
CI = Compound Interest
P = the principal investment amount (the initial deposit or loan amount)
r = the annual interest rate (decimal)
n = the number of times that interest is compounded per year
t = the number of years the money is invested or borrowed for
Let the principal be P
(P(1 + 4/100)2 - P) - (P × 4 × 2)/100 = 10
P = Rs. 6,250

CISF Constable Mock Test - 8 - Question 70

-If  then find the value of

Detailed Solution for CISF Constable Mock Test - 8 - Question 70

⇒ k = 4
⇒ y3 – 1/y3 = 43 + 3 × 4 = 64 + 12 = 76

CISF Constable Mock Test - 8 - Question 71

The sum of two numbers is 336 and their HCF is 42. Find the total number of such pairs of number?

Detailed Solution for CISF Constable Mock Test - 8 - Question 71

HCF = 42
Let the numbers are 42a and 42b
⇒ 42a + 42b = 336
⇒ a + b = 336/42 = 8
Possible factors are = (1,7), (5,3), (3,5), (7,1)
∴ Total number of such pairs of number = 4

CISF Constable Mock Test - 8 - Question 72

A sum of money is divided between two persons in the ratio of 3 : 5. If the share of one person is Rs. 20 less than the other, find the sum.

Detailed Solution for CISF Constable Mock Test - 8 - Question 72

Let the share of first person be 3x and the share of second person be 5x.
Difference between the shares = 5x - 3x = 2x
According to the question,
2x = 20
Sum = 3x + 5x = 8x = 4 × 2x = 80

CISF Constable Mock Test - 8 - Question 73

The table given below shows number of literate people and total population in a village from the year 2011 to 2016.

What is the average number of literate people from 2011 to 2016?

Detailed Solution for CISF Constable Mock Test - 8 - Question 73

Average number of literate people = (712 + 814 + 917 + 1250 + 1380 + 1560)/6 = 1105.5

CISF Constable Mock Test - 8 - Question 74

The table given below shows number of literate people and total population in a village from the year 2011 to 2016.

What is the percentage increase in the literate people in the year 2015 in comparison to year 2014?

Detailed Solution for CISF Constable Mock Test - 8 - Question 74

% increase in literacy from 2014 to 2015 = [(1380 - 1250/1250] × 100 = 26.49% = 10.4%

CISF Constable Mock Test - 8 - Question 75

The table given below shows number of literate people and total population in a village from the year 2011 to 2016.

What is the percentage increase (approximately) in the total population in the year 2012 in comparison to year 2011?

Detailed Solution for CISF Constable Mock Test - 8 - Question 75

% increase in population from 2011 to 2012 = [(3072 - 3042)/3042] × 100 = 0.98%

CISF Constable Mock Test - 8 - Question 76

Read the following passage carefully and answer the questions given below it.
Some gene mutations produce characteristics so undesirable that it is difficult to imagine any reasonable change in environmental conditions that would make them beneficial. There are mutations that lead to the nondevelopment of hands and feet, to the production of blood that will not clot, to serious malformations of essential organs, and so on. Any mutation that brings about death before the gene producing it can be passed on to another generation is a lethal mutation. A gene governing a lethal characteristic may be dominant. Under such conditions, the lethal gene is removed in the same generation in which it is formed. The lethal gene may, on the other hand, be recessive. Its effect is then not evident if the gene it is paired with is normal. The normal gene carries on for both. When this is the case, the lethal gene will remain in existence and will, every once in a while, make itself evident. These undesirable genes may be passed along for generations, even if dominant, before natural selection culls them out. The more seriously undesirable they are, the more quickly they are removed, but even outright lethal genes will be included among the chromosomes from generation to generation provided they are recessive. These deleterious genes make up the genetic load. The gene pool is necessary for the flexibility that will allow a species to survive and evolve over the eons and the genetic load is the price that must be paid for that. The size of a genetic load depends on two factors: The rate at which a deleterious gene is produced through mutation, and the rate at which it is removed by natural selection. When the rate of removal equals the rate of production, a condition of genetic equilibrium is reached and the level of occurrence of that gene then remains stable over the generations.

Q. What is a lethal mutation?

Detailed Solution for CISF Constable Mock Test - 8 - Question 76

The passage clearly states that a lethal mutation is that which produces death before the gene is passed on to the next generation through procreation or reproduction. Therefore, the correct answer is option 3.

CISF Constable Mock Test - 8 - Question 77

Read the following passage carefully and answer the questions given below it.
Some gene mutations produce characteristics so undesirable that it is difficult to imagine any reasonable change in environmental conditions that would make them beneficial. There are mutations that lead to the nondevelopment of hands and feet, to the production of blood that will not clot, to serious malformations of essential organs, and so on. Any mutation that brings about death before the gene producing it can be passed on to another generation is a lethal mutation. A gene governing a lethal characteristic may be dominant. Under such conditions, the lethal gene is removed in the same generation in which it is formed. The lethal gene may, on the other hand, be recessive. Its effect is then not evident if the gene it is paired with is normal. The normal gene carries on for both. When this is the case, the lethal gene will remain in existence and will, every once in a while, make itself evident. These undesirable genes may be passed along for generations, even if dominant, before natural selection culls them out. The more seriously undesirable they are, the more quickly they are removed, but even outright lethal genes will be included among the chromosomes from generation to generation provided they are recessive. These deleterious genes make up the genetic load. The gene pool is necessary for the flexibility that will allow a species to survive and evolve over the eons and the genetic load is the price that must be paid for that. The size of a genetic load depends on two factors: The rate at which a deleterious gene is produced through mutation, and the rate at which it is removed by natural selection. When the rate of removal equals the rate of production, a condition of genetic equilibrium is reached and the level of occurrence of that gene then remains stable over the generations.

Q. Consider the following statements about the genetic load. Which of them are TRUE?
A. The deleterious genes make up the genetic load.
B. The gene pool contains the genetic load.
C. Occurrence of deleterious genes is reduced only when the genetic load is completely reduced.