Indian Navy SSR Mock Test - 6 - Airforce X Y / Indian Navy SSR MCQ

Here, the correct answer is 'less.'

Key Points

• When two items/people/situations are compared, a comparative degree is used by putting ‘er’ to the adjective word or "more" with the adjective in association with the word ‘than’.
• Some common adjectives have irregular comparative and superlative forms.
  • Example:
    • Bad : Worse: Worst​
    • Little : Less : Least
• Here we are comparing the heroism of Atlas and Zeus.
• So here we need an adjective in the comparative degree to show the comparison.
• The presence of the word 'than' after the blank shows that there must be a comparative degree of the word 'little.'
• Now 'little' is an adjective that has two syllables.
• The comparative degree of 'little' is 'less.'
• Therefore, the correct answer is Option 4.
  ​

Correct sentence: Atlas is no less a hero than Zeus, in my opinion.

The correct answer is '9'.

Key Points

• Let's refer to the following lines of the passage:
  • He was a minister in the administration of Mogul Emperor Akbar and one of the members of the inner council of nine advisors.
• Thus, from above we can refer that the correct answer is option 4.

The correct answer is 'Treachery'.

Key Points

• Let's refer to the following lines of the passage:
  • According to a popular legend, he died on an expedition to Afghanistan at the head of a large military force due to treachery.
• Thus, the correct answer is option 3.

The correct answer is- 'had been'.

Key Points

• The past perfect continuous tense is used to say that an action begun before a certain point of time in the past and continued up to that time.
  • ​Example: He had been sleeping for 2hours when the alarm rang.
• The general structure of past perfect continuous tense is- had+ been + V1+ ing.
• Thus, option 2 is the most appropriate answer.
• The complete sentence is- ' Nikita had been studying for 5 hours when her father came.'

Additional Information

• Let us explore other options-
  • ​has been: it is used in the present perfect continuous tense to indicate that an action began in the past and is still continuing.
    • ​Example: He has been working since morning.
  • ​​had: it is used in the Past perfect tense, to indicate an action has completed before a certain point of time in the past.
  • • Example: I had gone to Pune.
  • is: tense is used in present continuous tense to indicate that an action is going on at the speaking or at the current time.
    • Example: He is sleeping.

​Hinglish

• Past perfect continuous का उपयोग यह कहने के लिए किया जाता है कि past में एक निश्चित समय से पहले action शुरू हुई और उस समय तक जारी रही।
• Past perfect continuous की सामान्य structure है- had been + V1 + ing।
• has been: इसका उपयोग present perfect continuous में यह इंगित करने के लिए किया जाता है कि अतीत में एक कार्रवाई शुरू हुई थी और अभी भी जारी है|

• ​Example: He has been working since morning.

• had: इसका उपयोग Past perfect में किया जाता है, यह इंगित करने के लिए कि अतीत में एक निश्चित समय से पहले एक कार्रवाई पूरी हो गई है।
  • Example: I had gone to Pune.
• is: present continuous का उपयोग में यह दर्शाने के लिए किया जाता है कि बोलने या वर्तमान समय में कोई क्रिया चल रही है|
  • Example: He is sleeping.

The correct answer is lose​.

Key Points

• The simple past tense is used when we talk about things that happened or existed before now.
• The structure is given below:
  • Subject + V2 + object. (Active Voice)
  • Object + was/were + V3 + by + subject. (Passive Voice)
• Example:
  • ​He won the car race. (active voice)
  • The car race was won by him. (passive voice)
• Would is modal verb. We use would when you are saying what someone believed, hoped, or expected to happen or be the case.
• Modal verbs are always followed by the V₁ form of verb. So 'lose' should be used here.

Correct Sentence: I did not imagine that our team would lose the match.

Additional Information

• Some phrases are followed by past indefinite/simple tense as given below:
  • ​It's high time, It's time, It's about time, etc.
• For example:
  • It's high time I start preparing for my final exams.
  • It's high time I started preparing for my final exams.

The correct answer is 'The Ministry of External Affairs has taken this issue solemnly.'

Key Points

• The given sentence is in Passive Voice. As per the question we have to change it into Active Voice.
• The structure of the given sentence is as follows:
  • Subject + has/have + V3 + Object. (Active Voice)
  • Subject (Objective Case) + has/have + been + V3 + Object (Subjective Case). (Passive Voice)
• Example:
  • We have looked at the plan carefully.(Active Voice)
  • The plan has been carefully looked at.(Passive Voice)
• The subject will be put in place of the object and the object will be put in place of the subject.
• 'has been taken' will be changed into 'has taken'.
• Lastly, the preposition 'by' will be removed.
• Therefore, as per the points, mentioned above, we find that the correct answer is Option 4.

Correct Sentence: The Ministry of External Affairs has taken this issue solemnly.

CONCEPT:

According to Bohr's model of an atom, the energy of the transition in the different orbits is written as;

ΔE=13.6[1n12−1n12]

or we also can write the energy of the different transitions as;

E_n = 

Here, n is the principal quantum number for different transitions.

and frequency is written as;

E = hf

here, E is the energy, h is the Planck's constant, and f is the frequency.

EXPLANATION:

To calculate the frequency maximum in the transitions we use;

and

At n = 1 ,

⇒E₁ = -13.6 eV

At n = 2 ,

E₂ = - 3.4 eV

At n = 3,

E₃ = -1.51 eV

at n = 4

E₄ = -0.85 eV

and n = 5

E₅ = 0.544 eV

As we see that from n = 2 to n = 1 the transition of energy is high and from equation (1) when energy increased the frequency will also increase.

Therefore from n = 2 to n = 1 transitions is having a maximum frequency.

The transition of the frequency is shown in the figure below;

Hence, option 1) is the correct answer.

The correct answer is option 4, i.e. Scanner.

Output devices of Computer hardware systems convert information into human accessible forms.

• It provides data in different forms such as audio, video, hard copy media etc.
• It used to display the result through projections or physical data.
• Output devices are all peripheral hardware and connected through cables and wireless networking.
• Plotter generates a hard copy of digitally depicted data or design.
  • It is sent through a graphic card and design is formed by using a pen.
• Monitor creates a visual display of processed data for users.
  • It is the most commonly used output device.
• The projector is a display device that projects a computer-created image on another surface.
• The scanner is an input device used to input physical media into digital form.

CONCEPT:

Amplifier:

• An amplifier is a device by which the amplitude of the input ac signal (voltage/current/power) can be increased.
• Transistors can act as amplifiers while they are functioning in the active region or when it is correctly biased.

Transistor as an amplifier (CE configuration):

• In this configuration, the emitter is common for both input and output.
• The input signal is connected in series with the voltage applied to the base-emitter junction.
• For proper functioning of a transistor, the emitter-base junction must be forward-biased and the collector-base junction must be reverse-biased.
• The current gain is given as,

• Voltage gain is given as,

• Power gain is given as,

Where ΔIC = change in collector current, ΔIB = change in base current, Vout = output voltage, Vin = input voltage, RL = signal resistance in the Collector, RE = signal resistance in the Emitter

CALCULATION:

Given β = 80, R_L = 5 kΩ = 5000 Ω and RI = 400 Ω

• We know that when a transistor is used in the common-emitter mode as an amplifier, then the voltage gain is given as,

​

⇒ A_V = 1000

• Hence, option 1 is correct.

Concept:

Work:

• Work is said to be done by a force on an object if the force applied causes a displacement in the object.
• The work done by the force is equal to the product of force and the displacement in the direction of the force.

Work = Force × displacement

Unit of force is Newton and displacement is meter.

So, the unit of work is Newton × meter. It is also equal to Joule.

• SI unit of work is Joule(J).
• Joule is also the SI unit of Energy.

Pressure

• Pressure is defined as the force acting per unit area.

$P=\frac{F}{A}$

• The SI unit of Pressure is Pascal.

Conclusion:

• SI unit of Force is not same as that of Pressure.
• Pressure is Force / Area and work is Force × displacement. Both are different.
• For work done force and displacement, both are required.

The incorrect statement and the correct option is 'SI unit of work is same as that of pressure.'

Additional Information

Work done at a higher level is studied as the dot product of force and displacement.

⇒ W = F.dx = F.dx. cos θ

The correct answer is Plague.

Key Points

• Any illness or health condition caused by a virus is referred to as a viral disease.
• The plague is an infectious disease that affects both humans and animals.
• It is caused by the bacteria Yersinia pestis, which is typically found in small mammals and their fleas and is found all over the world, including the United States.
• Fever, weakness, and a headache are among the symptoms.
• Infectious diseases are transmitted by infectious agents.
• Sunlight and drying are both effective at killing Yersinia pestis. When the bacteria are released into the air, the bacterium can survive for up to an hour, although it varies depending on the circumstances.

Thus, Plague disease is not caused by viruses.

Note ->

• Polio -> Poliovirus
• Aids -> Human immunodeficiency virus
• Conjunctivitis -> enterovirus 70 or coxsackievirus
• Plague -> Bacteria Yersinia pestis

Additional Information

• Polio:
  • Polio is a life-threatening viral disease caused by the poliovirus.
  • Polio is spread through contaminated water or food, as well as through contact with an infected person.
  • Many people infected with the poliovirus do not get sick and show no symptoms. Those who do become ill, on the other hand, develop paralysis and muscle weakness, which can sometimes be fatal.
• Aids:
  • Acquired immunodeficiency syndrome (AIDS) is a viral disease caused by the human immunodeficiency virus (HIV).
  • HIV (human immunodeficiency virus) is a virus that attacks the immune system of the body.
  • AIDS is transmitted by sexual contact with the infected person, by sharing infected needles and also spread from the infected mother to her child through placenta.
• Conjunctivitis:
  • Conjunctivitis or pink eye is a viral disease that is caused by allergies or bacterial or viral infection.
  • It is the Inflammation or infection of the eyeball's outer membrane and the inner eyelid.
  • Conjunctivitis is highly contagious and is spread through contact with infected people's eye secretions.

CONCEPT:

• The characteristics of wave motion are:
  • Energy is transferred from one place to another.
  • The velocity with which a wave travels is different from the velocity of the particle with which they vibrate about their mean position.
  • Mechanical wave requires a medium to propagate.
  • In a wave motion, the disturbance travels through the medium due to repeated periodic oscillation of the particles of the medium about their mean position.

On the basis of the direction of propagation, waves are classified into two types:

• Longitudinal Waves: Those waves whose direction of propagation and direction of disturbance is always parallel.
  • These waves produced in a medium that can sustain compressive strain.
  • Example Sound Wave
• Transverse Waves: Those waves whose direction of propagation and direction of disturbance is always perpendicular.
  • These waves produced in a medium that can sustain shearing strain.
  • Example: Electromagnetic Waves.

EXPLANATION:

• Energy is transferred without the actual transfer of particles.
• The velocity of the wave and the medium's particle is different.
• Mechanical waves require a medium to propagate.
• Since statement 4 is wrong. Hence option D is correct.

Concept:

• If B is a matrix such that BA = I = AB, then B is called the inverse of matrix A and denoted by A^-1
• A non-singular matrix is one whose determinant is non-zero
• Adjoint of a matrix A is the transpose of the matrix formed by the co-factors of its elements.

Formula:

Explanation:

From the formula of the inverse of the matrix, we can see that A^-1 exists when det(A) is non-zero or A is non-singular. Hence, a square matrix A is invertible if and only if A is a non-singular matrix.

∴ Statement I is true

Also, we know that A(adj A) = det(A)I_n for a non-singular matrix A where I is the identity matrix and n is order of matrix

Now det(A)I_n will multiply each element of I_n with det(A).

In taking det(det(A)I_n) we can take det(A) common from n rows which will give us [det(A)]ⁿ det(I_n)

And, we know, det(In) = 1

Also, det(AB) = det(A)det(B)

⇒ det(A(adjA)) = det(det(A)In)

⇒ det(A)det(adjA) = [det(A)]n

⇒ det(adjA) = [det(A)]n -1

∴ Statement II is true

Given:

Formula:

The magnitude of vector aî + bĵ + ck̂ is given by √(a² + b² +c²)

Calculation:

Magnitude of a→=1√3̂i+1√3̂j+1√3̂k

= √[(1/√3)2 + (1/√3)2 + (1/√3)2]

= 1

Explanation:

If θ is the angle between two lines whose direction ratios are a₁, b_1, c₁ and a₂, b₂, c₂ respectively then 

squaring both sides and we get

The correct Option is (3).

Given:

There are 18 yellow, 17 black, and 16 white balls.

Calculation:

Let E be the event such that the ball drawn is neither yellow nor white i.e., the event that the ball drawn is black.

We have n(E) as the favorable outcomes and n(S) as the total possible combinations.

n(E) = 17

And n(S) = 18 + 17 + 16 = 51

Probability = 

Note: According to the previous year's paper, there was no correct option, hence its option has been changed.

n^ is unit vectors in the direction of a⃗ ×b⃗  so the first statement cannot be correct as c⃗  and n^ are perpendicular to each other. 

Hence, statement 1 is incorrect.

Statement: 2

The correct answer is Waldemar Haffkine.
Key Points

• Waldemar Haffkine was a Ukrainian-French bacteriologist.
• He is credited as being the first microbiologist to create and administer cholera and bubonic plague vaccines.
• He tested the vaccines on himself.
• He was described as "a savior of humanity" by Lord Joseph Lister.
• As part of Queen Victoria's Diamond Jubilee Honors in 1897, he was named a Companion of the Order of the Indian Empire (CIE).

Important Points

• Cholera:
  • It is an extremely virulent disease that can cause severe acute watery diarrhoea.
  • It is caused by infection of the intestine with Vibrio cholerae bacteria.
  • After consuming infected food or water, symptoms usually appear between 12 hours and 5 days later.
• Plague:
  • It is caused by the bacterium, Yersinia pestis.
  • The most common ways for humans to contract the plague are through handling a plague-infected animal or by getting bitten by a rodent flea that is carrying the disease.

Additional Information

• Maurice Hilleman:
  • He was one of the greatest microbiologists and vaccinologists.
  • He developed a rubella vaccine in 1969 and paired it with his mumps and measles vaccine in 1971 to create the MMR shot.
• Robert Goddard:
  • He was an engineer, professor, physicist, and inventor.
  • He is credited with building the world's first liquid-fueled rocket.
• Charles Martin Hall:
  • American chemist Charles Martin Hall created a low-cost technique for isolating pure aluminium from its compounds in 1886.

The correct answer is W.Röntgen rays.Key Points

• X-rays were discovered by W.C. Röntgen in December 1895.
• Following seven weeks of diligent research into the characteristics of this novel form of radiation that could pass through screens of appreciable thickness.
• He gave them the term "X-rays" to emphasize that it was unclear what they were.
• When Röntgen detected a glow emerging from an adjacent chemically coated screen while testing if cathode rays could travel through the glass in his lab in Wurzburg, Germany, he realized that he had made an unintended discovery.
• Because of his lack of knowledge about them, he called the rays that produced this illumination X-rays.

Additional Information

• Alpha rays:
  • A flow of alpha particles is known as an alpha ray.
  • A helium nucleus-like particle made up of two protons and two neutrons are known as an alpha particle.
  • It is radioactive and is created during the alpha-decay process.
  • Like helium nuclei, alpha particles have no net spin.
• Super rays:
  • ​In Sonic Mania Plus, Super Ray may transform into other forms.
  • Ray the Flying Squirrel has achieved the Super State through the use of the seven Chaos Emeralds.
• Terrestrial rays:
  • ​A burst of gamma rays generated in Earth's atmosphere is called a terrestrial gamma-ray flash (TGF), also referred to as dark lightning.
  • TGFs have been observed to have durations between 0.2 and 3.5 milliseconds and energy as high as 20 million electronvolts.
  • TGFs are thought to be brought on by powerful electric fields generated above or within thunderstorms.
  • Researchers have also found energetic electrons and positrons from terrestrial gamma-ray flashes.

The correct answer is Jagjeevan Ram.
Key Points
Samta Sthal (The “Place of Equality”)

• Samta Sthal, near Raj Ghat, is the memorial of Babu Jagjivan Ram, the Deputy Prime Minister of India.
• He was a legendary leader of the backward classes.
• The memorial is located between the banks of the Yamuna River and Mahatma Gandhi Road, which is also called the main Ring Road.
• Samta Sthal means “Place of Equality.”
• The memorial symbolizes the equality of humans.
• The memorial features lush green lawns and shady trees around it.

Additional Information
List of memorials:

The correct answer is Journalism.

Key Points

• The Pulitzer Prize is regarded as the highest national honor in print journalism, newspaper, magazine, literary achievement, and musical composition within the United States. Hence, the correct answer is Journalism.
• Established in 1917 from funds endowed by journalist and newspaper publisher Joseph Pulitzer, the first Pulitzer Prizes were awarded on June 4, 1917, and are now awarded each May.
• The award is administered by Columbia University in the United States.
• Prizes are awarded yearly in 21 categories and in 20 of them, the winner receives a certificate and cash prize of $15,000. In the public service category, the winner is awarded a gold medal.

Additional Information

• Most Prestigious Art Awards:
  • Lalit Kala Academy Award
  • Shilp Guru
  • HugoBoss Prize
  • Turner Prize
  • National Medal of Arts
• Most Prestigious Cinema Awards:
  • National Film Awards
  • Oscars
  • Dadasaheb Phalke Award
  • Golden Globes
  • Academy Awards
• Most Prestigious Literary Awards:
  • Nobel Prize in Literature
  • National Book Awards
  • Booker Prize
  • Pulitzer Prize
  • Sahitya Akademi Award
  • Jnanpith Award

Mistake Points

• We have changed the third option to sports which was given as 'Literature' as the award is given in the field of both journalism and Literature.

The correct answer is Indus.

Key Points

• Chenab River originates from Baralacha Pass in Himachal Pradesh.
• It’s the largest tributary of the Indus river (In terms of Drain).
• It is also known as the Chandrabhaga River.
• It is a major river that flows in India and Pakistan.
• It is one of the 5 major rivers of the Punjab region.

Additional Information

The correct answer is Ramsay MacDonald

Round table conference:

• The three Round Table Conferences of 1930–32 were a set of peace conferences arranged by the British Government and Indian political personalities to review constitutional reforms in India.
• These started in November 1930 and ended in December 1932.
• They were administered as per the recommendation of Jinnah to Viceroy Lord Irwin and Prime Minister Ramsay MacDonald and by the report submitted by the Simon Commission in May 1930.

Second round table conference:

• In January 1931 to build a favourable atmosphere for talks, the government lifted the ban on the Congress Party and released its leaders from prison.
• On 5 March 1931, the Gandhi-Irwin Pact was signed. As per this pact, Mahatma Gandhi agreed to postpone the Civil-Disobedience Movement and participate in the Second Round Table Conference.
• In September 1931, the Second Round Table Conference was held in London.
• Mahatma Gandhi engaged in the Conference but returned to India misled as no agreement could be reached on the demand for complete independence and the communal question.
• In January 1932, the Civil-Disobedience Movement was resumed.
• The government reacted to it by arresting Mahatma Gandhi and Sardar Patel and by re-imposing the ban on the Congress party.

Concept:

• India is a country of vast geographical expanse.
• In the north, it is bound by the lofty Himalayas.
• The Arabian Sea in the west, forming the west coast.
• The Bay of Bengal in the east, forming the east coast.
• The Indian Ocean in the south.

Explanation:

Important Points

Thus, Paradip and Haldia ports are located on the Eastern coast of India.

The correct answer is option 4, i.e. Surya Sen.

Key Points

The failure of the first non-cooperation movement had led to the revival of the armed movement.

• In October 1924, after an All India Conference, the Hindustan Republican Association (HRA) was founded to organize an armed revolution in India.

Between Kakori and Alamnagar, near Lucknow, the Kakori Revolution i.e. a train robbery happened on 9 August 1925.

• The robbery was led by Ram Prasad Bismil, and they looted the British treasure from a train.
• Other revolutionaries involved were Ashfaqulla Khan, Chandrashekhar Azad, Rajendra Lahiri, Manmathnath Gupta, Sachindra Bakshi, Keshab Chakravarthy, Mukundi Lal (Mukundi Lal Gupta), Murari Sharma (fake name of Murari Lal Gupta), and Banwari Lal.

The British Government arrested armed revolutionary youths and tried them in the Kakori (Conspiracy case - 1925).

• Four, including Ram prasad Bismil and Ashfaqulla, were hanged, seventeen were sentenced to long terms of imprisonment and four were sentenced life imprisonment.

Later the revolutionaries came under the influence of socialist ideas, and in 1928 under the leadership of Chandra Shekhar Azad, changed their organization title to the Hindustan Socialist Republican Association (HSRA).

The Maurya dynasty ruled Magadha after the Nanda dynasty.

Key Points

• The later Nanda rulers proved to be weak and unpopular.
• Their rule in Magadha was supplanted by that of the Maurya dynasty under which the Magadhan empire reached the apex of glory.
• Maurya Emperor Chandra Gupta is not only credited with the abolition of the Nanda dynasty and the end of foreign rule in Punjab-Sindh but he established his supremacy over most of India.
• Plutarch has written that Chandra Gupta established his supremacy over the whole of India with an army of 6 lakhs.
• According to Justin, the whole of India was in his possession.
• It is said in the Mahavamsa that Kautilya made Chandra Gupta the emperor of Jambudweep.

• The Mauryas also conquered the republics or samghas which Kautilya considered obstacles to the growth of the empire.

Hence, we can conclude that The Maurya dynasty ruled Magadha after the Nanda dynasty.

The correct answer is 1972.Key Points

Amar Jawan Jyoti:

• Inaugurated on January 26, 1972 by then-Prime Minister Indira Gandhi, Amar Jawan Jyoti was built to commemorate Indian soldiers who died in the 1971 Indo-Pak War.
• India's victory at the end of this war created Bangladesh.
• It was India's National War Memorial until the dedication and lighting of the new National War Memorial and its flame on February 25, 2019.
• Prime Minister Narendra Modi inaugurates the National War Memorial.
• On January 21, 2022, the old flame merged with the new at the National War Memorial.

Additional Information

History of National War Memorial:

• The iconic India Gate in Lutyen's Delhi was built by the former British Empire in 1931 by erstwhile British empire to commemorate the Battle Casualty (Fatal) of India during World War I as well as Third Anglo-Afghan War.
• Towering high, it is a must-see for any visitor to New Delhi.
• Of his more than 83,000 Indians who lost their lives, India Gate has his 13,516 names inscribed throughout the monument.

The logic followed here is:

Similarly,

Hence, the correct answer is "option (1)".

The correct answer is Ministry of Ports, Shipping and Waterways

Key Points

• The Union Minister of Ports, Shipping & Waterways and AYUSH launched the 'Green Tug Transition Programme' (GTTP).
• India's first National Centre of Excellence in Green Port & Shipping (NCoEGPS) was inaugurated in Gurugram, Haryana.