Indian Navy SSR Mock Test - 8 - Airforce X Y / Indian Navy SSR MCQ

The correct answer is 'Whom.'

Key Points

• The relative pronoun 'which' is used for animals in general or non-living things.
  • Example: Raghav bought the top hybrid car, which will help him save on gas.
• "Whose" is a possessive adjective meaning "of or relating to whom".
  • Example: John works with that other chap whose name I can't remember.
• The relative pronoun 'who' is used mainly for people.
  • Example: The musician who wrote this song is Indian.
• ​“Who” is a subjective pronoun and “Whom” is an objective pronoun.
• “Who” is always subject to a verb, and “whom” is always working as an object in a sentence.
• If you can replace the word with “he” or "she,” use who.
• If you can replace it with “him” or “her,” use whom.
• The form "whom" is used as the object of a verb or of a preposition
  • Example: Who would like to go on vacation?
    Whom would you rather have as a boss?
• Therefore, the use of the relative pronoun 'whom' should be used to make the sentence grammatically correct.
  ​

​Correct sentence: Whom did you meet at the wedding reception last night?

The correct answer is Fickle.Key Points

• “Loyal” means someone who is very trustable.
• “Fickle” means who is never fixed on anything, especially when it comes to trust or loyalty.
  • Example: You should never trust a fickle-minded person.
• Therefore, “Fickle” is the correct antonym for “Loyal”.

Additional Information

The meaning and usage of the other words are as follows:

• “Ardent” means very passionate about something.
  • Example: He is an ardent follower of Virat Kohli.
• “Stupid” means foolish.
  • Example: I have never encountered such a stupid excuse for not coming to the party.
• “Tragic” means heartbreaking or sad.
  • Example: His failure in the exam after so much hard work was very tragic.

The correct answer is - "and"

Key Points

• From the given options, the most appropriate answer is "and".
• And joins two independent words, clause, phrase, sentence.
  • Eg. She is intelligent and she is beautiful too.
• And works here as conjunction.
• Conjunction is a word or group of words that joins two or more words, phrase, clause etc.
• Let us see the usages of the other words given in options -
  • Because - to given reason of something.
    • Eg. I did not do my work because I was not well.
  • But - joins two contrasting ideas.
    • Eg. We go but we will not stay there.
  • As - joins to introduce two events happening at the same time or introduce similarity on something.
    • Eg. She's wearing the same shirt as I am.
• Thus, Option 2 is correct option.

The correct answer is "How was such a heavy ball thrown by Raman to the other side of the building?"

Key Points

• We have to change the above sentence to passive form.
• In Active Voice, a sentence emphasizes the subject.
  • In Passive Voice, a sentence emphasizes the action or the object of the sentence.
  • The given sentence is in the active voice and 'Raman' is the subject and 'heavy ball' is the object.
  • When we convert this sentence into passive voice, the subject 'Raman' of the active voice becomes the object.
  • The object 'the heavy ball' becomes the subject.
  • The passive form rule 'was + V3 (sent)' should be used.

Thus, the correct answer is How was such a heavy ball thrown by Raman to the other side of the building?

The correct answer is "C"

Key Points

• There is an error in part (c). The correct phrase should be: "that one can work in, such as print, online, or television."
• The modal verb "shall" should be replaced with the modal verb "can" because "can" is used to describe the ability or possibility to do something.
• The modal verb "shall" is used to express a strong obligation or determination, which does not fit the meaning of the sentence in this context.
• The phrase "such as print, online, or television" describes examples of the types of media that a journalist can work in, so the modal verb "can," which describes the ability to do something, is appropriate.

Thus, option 1 is the correct answer.

Correct sentence: As a journalist, there are several types of media that one can work in, such as print, online, or television.

The correct answer is 'Bolster'.

Key Points

• Let's explore the meaning of the marked word and the given word.
  • Boost: help or encourage (something) to increase or improve.
    • Example: The new resort area has boosted tourism.
  • Bolster: support or strengthen.
    • Example: Timman needs to win a game to bolster his confidence.
• From above, we can refer that the correct answer is option 3.

Additional Information

• Inhibit: hinder, restrain, or prevent (an action or process).
  • Example: An unhappy family life may inhibit children’s learning.
• Placate: make (someone) less angry or hostile.
  • Example: These changes did little to placate the unions.
• Shackle: restrain; limit.
  • Example: Industrial progress is being shackled by a mass of regulations.

The correct answer is 'The, a, the.'

Key Points

• The only articles in English are ‘the’ and ‘a/an’.
• We use the article "a or an" to indicate any non-specified member of a group or category.
• If a word begins with a vowel sound, then the correct article is 'an'; otherwise, if it begins with a consonantal sound, the correct article is 'a'.
• The definite article 'the' is used before a noun to indicate that the identity of the noun is known to the reader.
  • Example:
    • We are looking for an apartment.
    • I own a cat and two dogs.
    • I love to visit the building.
• In the given sentence, we are referring to the "little boy" who purchased bread, so the first blank must have "the."
• The word "bread" is an uncountable noun.
• We never say "one bread" or "fifty breads."
• So, the correct answer for the second blank is the indefinite article "a."
• The third blank must be filled with "the" as it is referring to the particular bakery.
• Hence, the correct answer is Option 2.
  ​

​Correct sentence:The little boy purchased a loaf of bread from the bakery for breakfast.

The correct answer is option 4) i.e. 2.7​ ​eV

CONCEPT:

• Photoelectric effect: The photoelectric effect is a phenomenon where electrons are ejected from a metal surface when the light of sufficient frequency is incident on it. These ejected electrons are called photoelectrons.
  • When a photon falls on the metal surface, the photon’s energy is transferred to the electron.
  • Some part of the energy gets utilized in removing the electron from the metal surface, and the remaining goes into giving kinetic energy for the ejected electron.
• Work function (ϕ): It is the minimum amount of energy required to cause photo-emission of electrons from a metal surface when light is incident on it.
• Einstein’s Photoelectric Equation gives the relationship between work function (ϕ), the kinetic energy of the emitted electron, and the energy of the photon (E).

E = ϕ + KE

CALCULATION:

Given that:

Energy of incident light, E = 5 eV

Work function, ϕ = 2.3 eV

Using Einstein’s Photoelectric Equation,

E = ϕ + KE

5 = 2.3 + KE

⇒ KE = 5 - 2.3 = 2.7 eV

The correct answer is Fish.

• Fish contains a large amount of protein.

Key Points

• Fish is a low-fat high-quality protein.
• It is filled with omega-3 fatty acids and some vitamins such as D and B2 (riboflavin).
• It is rich in calcium and phosphorus and a great source of minerals, such as iron, zinc, iodine, magnesium, and potassium.

Important Points

• Proteins are essential nutrients for the human body.
• They are one of the building blocks of body tissue and can also serve as a fuel source.
• As a fuel, It provides as much energy density as carbohydrates.

​Additional Information

• Benefits of Eating fish:-
  • Fish is packed with protein, vitamins, and nutrients that can lower blood pressure.
  • High in important nutrients.
  • May lower our risk of heart attacks and strokes.
  • Contain nutrients that are crucial during development.
  • May boost brain health.
  • May help prevent and treat depression.
  • May reduce our risk of autoimmune diseases.
  • May help prevent asthma in children.

The correct answer is Hypertext Transfer Protocol.

Key Points

• HTTP stands for Hypertext Transfer Protocol. Hypertext Transfer Protocol is an application protocol used for data communication. It is the base of data communication in the World Wide Web. It provides a standard for web browsers that facilitates users to exchange information over the internet.
• HTTP is used by most websites to access any file or page. HTTP is a request-response protocol in the client-server computing model. It is an application layer protocol designed within the framework of the Internet Protocol Suite.
• Hypertext - A text containing a link within it, is known as hypertext. If you click on a word on a webpage and it redirects you to a new page, it means you have clicked on a hypertext.​
• It is the protocol where encrypted HTTP data is transferred over a secure connection. It ensures data security over the network - mainly public networks like Wi-Fi.
• By virtue, HTTPS encryption is done bi-directionally, which means that the data is encrypted at both the client and server sides. Only the client can decode the information that comes from the server. So, HTTPS does the encryption of data between a client and a server, which protects against eavesdropping, forging of information, and tampering of data.

Additional Information

• HTTPS is HTTP with encryption.
• The only difference between the two protocols is that HTTPS uses TLS (SSL) to encrypt normal HTTP requests and responses. As a result, HTTPS is far more secure than HTTP.
• A website that uses HTTP has http:// in its URL, while a website that uses HTTPS has https://.

Joule is the unit of work or energy; it is equal to the work done by a force of one newton acting through one meter. It was named in honor of the English physicist James Prescott Joule. It equals 107 ergs, or approximately 0.7377 foot-pounds. In electrical terms, the joule equals one watt-second—i.e., the energy released in one second by a current of one ampere through a resistance of one ohm.

The correct answer is option 1) i.e. 10⁶ N/m².

CONCEPT:

Young’s modulus:

• Young's modulus a modulus of elasticity, applicable to the stretching of wire, etc., equal to the ratio of the applied load per unit area of the cross-section to the increase in length per unit length.
• It is denoted as E or Y. The unit of Young’s modulus is N m-2.

⇒Y= σ ϵ

Where σ = stress, ϵ = strain in wire.

• Young’s Modulus Formula by using other quantities:

⇒Y=FL0AΔL

Where F = force exerted under tension, A = actual cross-sectional area, L0 = actual length, ΔL = change in length.

CALCULATION:

Given: Force applied (F) = 3kN = 3 × 10³ N, Area of the beam (A) = 10m², Original length (L) = 100m, and Change in length, ΔL = 3cm = 0.03m

• Young's modulus(Y) is given as:

⇒ Y = 10⁶ N/m²

Given:

The equation of the sphere with centre at (2, 3, 5), which touches the XOY plane

Concept used:

The required sphere is (x - x1)2 + (y - y1)2 + (z - z1)2 = r2 where x₁, y₁, z₁ are the centre of the sphere and r is the radius

Radius = perpendicular distance from (x1, y1, z1) to the plane ax + by + cz + d = 0 is given by

.

Calculations:

Let (x₁, y₁, z₁) = (2, 3, 5)

Formula: Radius = perpendicular distance from (x₁, y₁, z₁) to the plane ax + by + cz + d = 0

Radius = perpendicular distance from (2, 3, 5) to the plane z = 0

The required sphere is (x - x₁)² + (y - y₁)² + (z - z₁)² = r²

(x - 2)² + (y - 3)² + (z - 5)² = 5²

x² - 4x + 4 + y² - 6y + 9 + z² - 10Z + 25 = 25

x² + y² + z² - 4x - 6y - 10z + 13 = 0

Concept:

Equation of the form solve by following the steps

1. find I. 
2. The solution will be y I.F = ∫ Q I.F dx + C

Formula used:

1. sin θ/cos θ = tan θ 2.1/cos θ = sec θ

3. e^{ln x} = x 4. ∫ sec² x = tan x

Calculation:

∴ The solution of an equation is sec x = (tan x + c)y.

Concept:

Cube Roots of unity are 1, ω and ω2

Here, ω =  and ω2 =

Property of cube roots of unity

1) ω3 = 1

2) 1 + ω + ω2 = 0

3) ω = 1 / ω 2 and ω2 = 1 / ω

4) ω3n = 1

Explanation:

(1 - ω + ω2)6 + (1 - ω2 + ω)6 = {(1 + ω2) - ω}6 + {(1 + ω)- ω2 }⁶

= (- ω - ω)⁶ + (- ω2 - ω2)⁶ (∵ 1 + ω + ω2 = 0

= (- 2ω )⁶ + (-2ω2)⁶

= (-2)⁶ ω⁶ + (- 2)⁶ (ω²)⁶

= 2⁶ ω6 + 26 ω¹²

= 64ω⁶ + 64ω¹²

= 64 (ω³)² + 64 (ω³)⁴

= 64 (1)² + 64 (1)⁴ (∵ ω³ = 1)

= 64 × 1 + 64 × 1

= 64 + 64

= 128

∴ (1 - ω + ω2)6 + (1 - ω2 + ω)6 = 128

Concept:

If z represents a complex number, then it can be represented as z = x + iy, where x, y ∈ R and i =

Conjugate of a Complex Number:

If z = x + iy is a complex number, then z¯ represents its conjugate given by z¯ = x - iy.

Calculation:
We have z1 = 2 - i and z2 = 1 + 3i

The correct answer is Option 4.

Given:

The probabilities of the occurrence of two events E and F are 0.25 and 0.50 respectively.

The probability of their simultaneous occurrence is 0.14.

Concept used:

By definition of P(E or F) under axiomatic approach(also called addition theorem) we know that: P(E∪F) = P(E) + P(F) – P(E∩F)

Calculation:

P(E) = 0.25

P(F) = 0.50

P(E ∩ F)= 0.14

The probability that neither E nor F occurs is = P(E' ∩ F')

⇒ [1 - P(E ∪ F)]

We know that P(E ∪ F) = P(E) + P(F) - P(E ∩ F)

⇒ 0 .25 + 0.50 - 0.14

⇒ 0.61

Now, P(E' ∩ F')

⇒ 1 - 0.61

⇒ 0.39

∴ The required answer is 0.39.

Concept Used:-

We know that the Taylor expansion of e^x,

Since, 0! is equal to 1. So, the above sum can be written as,

Let the sum of the above series is S. Then,

The denominator number written with factorial is one less than the numerator number written with square. Thus, in general, this series can be written as,

Now using equation (1), (2) and (3) we get,

⇒ S = e + e + 2e + e

⇒ S = 5e

So, the sum of the given series is 5e.

Hence, the correct option is 1.

The correct answer is Ganga River.Key Points

• Ganga is the major river system in India.
• It starts from the Gangotri in the Himalayas and drains into the Bay of Bengal.
• The major tributaries of the Ganga are:
  • Right bank tributaries: Yamuna, Chambal, Banas, Ken, Betwa, Son, Rihand, Koel
  • Left bank tributaries : Bhagirathi, Alakananda, Ramganga,Ghahgra, Gomti, Gandak, Rapti, Kosi

​Yamuna River System

• ​The Yamuna River is the largest tributary of the Ganga River.
• It originates from the Yamunotri glacier, at the Bandarpoonch peak in Uttarakhand.
• The main tributaries joining the river include the Sin, Hindon, Betwa Ken, and Chambal.
• The Tons is the largest tributary of the Yamuna.

The correct answer is Indian National Congress.

In News

• Siddaramaiah appointed Karnataka CM, DK Shivakumar to be Deputy CM in May 2023.

Key Points

• Siddaramaiah:
  • He is referred to by his nickname Siddu.
  • He is replacing Basavaraj Bommai as the 22nd Chief Minister of Karnataka.
  • He was also former Leader of the Opposition in Karnataka Legislative Assembly
  • He represents the Badami Assembly constituency since 2018.
  • He served as the CM of Karnataka from May 2013 to May 2018.

The correct answer is Sir Frank Whittle.

• Jet engine was invented by Sir Frank Whittle.

Key Points

• Sir Frank Whittle
  • ​Sir Frank Whittle, English aviation engineer and pilot who invented the jet engine.
• Roger Bacon
  • ​He was the first European to describe in detail the process of making gunpowder, and he proposed flying machines and motorized ships and carriages.
• James Watt
  • ​James Watt was an inventor and mechanical engineer whose improvements in steam engine technology drove the Industrial Revolution.
• Lewis Edson Waterman
  • ​Lewis Waterman invented a superior fountain pen that made inkwells and dip pens obsolete.

1. Harass - This implies persistently troubling or bothering someone.
2. Annoy - This means to irritate or bother, often in a less intense or less aggressive manner than harassment.
3. Ravage - Unlike the other words, which deal with emotional or minor physical disturbances, "ravage" implies severe damage or destruction, often used in the context of natural disasters, wars, or something that physically destroys.
4. Distress - This involves causing someone to feel extremely worried, upset, or troubled, often as a result of a particular event or situation.

While "harass," "annoy," and "distress" are primarily concerned with causing emotional turmoil or irritation, "ravage" stands out because it refers to causing severe and extensive damage or destruction,

The correct answer is DRDO.Key Points

• The Arjun MBT Project was initiated by the Defence Research and Development Organisation (DRDO) in 1972.
• The Arjun MBT Project was initiated by Defence Research and Development Organisation (DRDO) in 1972 with the Combat Vehicles Research and Development Establishment (CVRDE) as its lead laboratory.
• Objective:
  • To create a “state-of-the-art tank with superior firepower, high mobility, and excellent protection".

Additional Information

• Features of the Arjun Tank:
  • The Arjun MBT is equipped with an indigenously developed 120mm main rifled gun with Fin Stabilised Armour-Piercing Discarding Sabot (FSAPDS) ammunition.
  • FSAPDS is capable of destroying all known tank armour up to direct shooting range.
  • It also has a computer-controlled integrated fire control system with a stabilised sighting that works in all lighting conditions.
  • The secondary weapons include a coaxial 7.62-mm machine gun for anti-personnel and a 12.7-mm machine gun for anti-aircraft and ground targets.

The correct answer is Article 343.

• Article 343 is associated with Official Language.

Key Points

• Official Language:
  • Article 343(1) of the Constitution provides that Hindi in Devanagari script shall be the Official Language of the Union.
  • Article 343(2) also provided for continuing the use of English in official work of the Union for a period of 15 years (i.e., up to 25 January 1965) from the date of commencement of the Constitution.
  • Article 343(3) empowered the parliament to provide by law for continued use of English for official purposes even after 25 January 1965.

Additional Information

• There are 22 official languages in India and they are covered under the 8th schedule of the Indian Constitution.
  • The Eighth Schedule of the Indian Constitution lists 22 languages, which have been referred to as scheduled languages and given recognition, status, and official encouragement.
  • In addition, the Government of India has awarded the distinction of classical language to Kannada, Malayalam, Odia, Sanskrit, Tamil, and Telugu.
  • Bodo, Dongri, Maithili, and Santhali were added to it by the 92nd Amendment Act of 2003.
  • However, the long-standing demand for the recognition and inclusion of the Bhoti language in the 8th Schedule has not been met.

Har Gobind Khorana is associated with the discoveries in genetic engineering.

Key Points

• Khorana -
  • In 1966, H. Gobind Khorana and his coworkers used long, artificial mRNA molecules containing only one nucleotide repeated continuously, or different nucleotides in repeating patterns.
  • The researchers added each artificial mRNA to ribosomes in a test tube and studied the sequence of amino acids in the polypeptide chain made by the ribosomes.
  • Khorana’s method, combined with the results of Nirenberg and Leder experiments, deciphered all the 64 codons in the dictionary of genetic code.

Additional Information

• James Watson and Francis Crick -
  • They deduced the DNA structure in 1953 from Erwin Chargaff’s rules, knowing the appropriate tautomeric forms of the nitrogen bases and studying Rosalind Franklin’s X-ray diffraction studies of DNA.
• Meselson and Stahl -
  • They demonstrated that the mechanism of replication is semiconservative.
  • This means that each new DNA helix is composed of one old strand and one new strand.
  • The DNA replication requires a template to make a new copy of DNA, nucleoside triphosphate building blocks, and the enzyme DNA polymerase.
  • DNA polymerases synthesize DNA in a 5′-to-3′ direction using RNA primer.

The Correct Answer is Unified Payments Interface.Key PointsUnified Payments Interface (UPI):

• It is an advanced version of Immediate Payment Service (IMPS)- round-the-clock funds transfer service to make cashless payments faster, easier and smoother.
• The UPI was launched in 2016 and is operated by the National Payments Corporation of India (NPCI).
• UPI is currently the biggest among the National Payments Corporation of India (NPCI) operated systems including National Automated Clearing House (NACH), Immediate Payment Service (IMPS), Aadhaar enabled Payment System (AePS), Bharat Bill Payment System (BBPS), RuPay, etc.

National Payments Corporation of India (NPCI):

• NPCI, an umbrella organization for operating retail payments and settlement systems in India, is an initiative of the Reserve Bank of India (RBI) and the Indian Banks’ Association (IBA) under the provisions of the Payment and Settlement Systems Act, 2007. Hence, statement 2 is correct.
• It is a “Not for Profit” Company under the provisions of Section 25 of the Companies Act 1956 (now Section 8 of the Companies Act 2013), with an intention to provide infrastructure to the entire Banking system in India for physical as well as electronic payment and settlement systems.
• National Payments Corporation of India (NPCI) links all the ATMs in India. Hence, statement 3 is not correct.

​Indian Banks' Association (IBA):

• It was formed in 1946.
• It is a representative body of management of banking in India operating in India – an association of Indian banks and financial institutions based in Mumbai.
• IBA was formed for the development, coordination and strengthening of Indian banking, and to assist the member banks in various ways including implementation of new systems and adoption of standards among the members.

The logic followed here is:

Hence, the correct answer is "125".

Abu'l Fazl was assassinated while he was returning from the Deccan by Vir Singh Bundela (who later became the ruler of Orchha) between Sarai Vir and Antri (near Narwar) in a plot contrived by Akbar's eldest son Prince Salim (who later became the Emperor Jahangir)[16] in 1602, because Abu'l Fazl was known to oppose the accession of Prince Salim to the throne. His severed head was sent to Salim at Allahabad. Abu'l Fazl was buried at Antri.[17][18] Abu'l Fazl's son Shaikh Afzal Khan (29 December 1571 – 1613) was later appointed governor of Bihar in 1608 by Jahangir.

The Danish World No.1 Viktor Axelsen clinched victory in the Japan Open final after defeating Jonatan Christie of Indonesia.
In women’s singles, world number two An Se-Young of South Korea beat He Bing Jiao of China to clinch the title. She also replaced replacing Japan’s reigning world champion Akane Yamaguchi to bag the World No. 1 spot.