Indian Navy SSR Mock Test - 2 - Airforce X Y / Indian Navy SSR MCQ

The correct answer is 'an action which makes a bad situation worse'.

Key Points

• The idiom "a turn of the screw" means to make a bad situation worse by adding further complications or difficulties to it. It is often used to describe a situation where things are already bad, but someone or something makes it even worse by taking an action that aggravates the situation.
• For example, imagine a company that is struggling financially. The CEO decides to lay off a large number of employees, which causes widespread outrage and negative publicity. This action could be described as "a turn of the screw" because it made an already bad situation worse by adding more problems to the mix.
• Therefore, the most appropriate meaning of "a turn of the screw" is (4) an action which makes a bad situation worse.

To build consensus was a problem. it was not an easy task.

The government went ahead when it didn't get the support of BJP and the left.

The correct answer is ‘All the biscuits were eaten by the mouse from the tin.’

Key Points

• The given sentence is in active voice. As per the question we have to change it into passive voice.
• The structure of the given sentence is as follows:
  • Subject + past tense + Object (Active voice)
  • Subject (objective case) + was/were + past participle + Object (subjective case) (Passive voice)
• Example:
  • She built a big house. (Active voice)
  • A big house was built by her. (Passive voice)
• The subject of the given sentence is ‘The mouse’.
• The object of the given subject is ‘all the biscuits’.
• The subject will be put in place of the object and the object will be put in place of the subject.
• Ate will be changed to were eaten.

Correct sentence - All the biscuits were eaten by the mouse from the tin.

Additional Information

• When converting active to passive voice, it is important to keep in mind that simple past gets converted to past perfect tense.
• In addition to this, it is important to place ‘all’ between the ‘was’ and ‘eaten’.
• This is because adverbs and adjectives tend to split the verb between its main verb and the auxiliary verb.
• To add to this, the placement of the phrase ‘from the tin’ is crucial.
• Since the phrase describes the biscuits, not the mouse, it is important to place the phrase as close to ‘biscuits’ as possible.

The correct answer is, 'course'.

Key Points

• The word that is suitable for filling the giving blank is a noun which means an educational curriculum.
• Course means a learning programme.
  • Synonym- curriculum, academics, journey.
    • Example- The University decided to introduce new courses starting from the next academic year.
• Hence, option 2 is the correct answer.

Therefore, the complete sentence is -'He was denied admission to the test as he couldn't pay the course fee'.

Additional Information

• coarse- rough texture.
• corse- a body.
• curse- bane.

The correct answer is 'ought to'.

Key Points

• 'ought to' is used to say what somebody should do.
• Hence, as per the context of the sentence 'ought to' will come in the bank
• 'may' express possibility. (might is in the past tense)
• 'could' is used to indicate possibility.

Hence, the correct answer is Option 4.

The correct answer is 'to, in, at​.'

Key Points

• The context of the sentence tells that building homes higher up is a good method for avoiding the Bihar floods that occur every year.
• ​​The word after the first blank is a verb "combat" and we have to make the to-infinitive form, so we must use "to" in the first blank.
  • To: We use "to" before a verb to make the to-infinitive form.
    • Example: I need to leave early today.
• The second blank is referring to something that is located inside a defined space., so we must use "in" in the second blank.
  • In: We use "in" when something is located inside of a defined space. ​
    • Example: I’m in the building now.
• The third blank is referring to a position or location which we see as a point, so we must use "at" in the third blank.
  • At: We use "at" to refer to a position or location which we see as a point.
    • Example: I was sitting at my desk.​
• ​So, the correct answer is Option 2.

Correct sentence: A good way to combat the annual floods in Bihar is to build houses at an elevation.

Additional Information

• Let us look at the usage of other options:
  • Into: We use "into" to talk about the movement of something, usually with a verb that expresses movement (e.g. go, come, straight).
    • It shows where something is or was going.
    • Example: Helen came into the room.
  • On: "On" is used to show that something is in a position above something else and touching it, or that something is moving into such a position.
    • Example: Look at all the books on your desk!
  • Of: We use "of" when we want to show that how people or things relate to other things or people.​
    • Example: Tiffany stared at the floor of her room.
  • ​For: We use "for" to talk about a purpose or a reason for something.
    • Example: I bought that for you.
  • Through: When we talk about movement from from one end or side of something to the other.
    • Example: I love walking through the forest.

The correct answer is - 'certainly differs from you'
Key Points

• Replace 'Certainly differs from you' in place of 'Certainly differ with you'.
• The word 'differ' which means 'to have a different opinion' does not follow 'with' preposition after it. It follows 'from' after it.

Hence the correct sentence is - Harish certainly differs from you in this case.

The correct answer is 'Option 2'.

Key Points

• The correct option is: 'had shared'.
• The sentence is in the past tense, and it is referring to an event (sharing a home) that occurred even further in the past, before another event (the home still smelled like the husband).
• Therefore, the past perfect tense ("had shared") is needed.

Therefore, the correct sentence is: 'The home I had shared with my husband in 1986 still smelled like him'.

Additional Information

• "Sharing" is the present participle of the verb "to share" and it's not appropriate here as the sentence is not in present continuous tense.
• "Shared" is the simple past tense, and it might work in this sentence, but it's less accurate than "had shared" because it doesn't clearly convey that the sharing occurred before the smelling.
• "Have shared" is the present perfect tense, which is used to describe actions or states that started in the past and continue in the present, or actions that have effects that are relevant now. It's not appropriate here because the sentence is discussing events that occurred entirely in the past.

The correct answer is 'Hurry! Contest closes on February 19, 2019.'.

Key Points

• The most appropriate answer with correct punctuation inserted in the given sentence is 'Hurry! Contest closes on February 19, 2019.'.

• An exclamation mark(!), known informally as a bang or a shriek, is used at the end of a sentence or a short phrase which expresses very strong feeling.
  • Example: What a lovely view you have here!
• Here, comma is used to separate the date from the year and a full stop (.) is chiefly used to end a sentence.
• By referring to the above explanation, it can be concluded that option 2 is the appropriate option with the correct punctuation marks.

The correct answer is 'My least favourite season is, winter'.

Key Points

• An assertive sentence begins with a subject and ends with a full stop (.).
• The first word of every sentence is capitalized.
• Capital letter is used for nouns, days and months but not for seasons, religions, religious terms, countries etc.
• Let's have a look at the option 1,
  • My least favourite season is, Winter - In this sentence there is no need to use comma (,) and winter shouldn't be in capital letter.
  • Comma is used only to separate words, phrases or clauses in series. We don't use comma in between words of a sentence unless a brief pause is required.
  • Capitalization of words take place only at the beginning of a sentence, unless the word is a Noun, special day or special event.
• The correct answer is - 'My least favourite season is, winter'.

Additional Information

• All other sentences in the options follow correct punctuation.
• Second option, the first word 'We' is capitalized. Capital letter is used for days, therefore Sunday is in capital letter and the sentence ends with a full stop. The sentence follows correct punctuation.
• Third option,
  • We use full stop after abbreviations for titles, names, degrees etc. We use full stop to close a statement. Noun begins with a capital letter.
  • All of which is followed. Hence, third option is correct.
• Fourth option,
  • Two sentences are given. Both sentences begin with a capital lettered word and is closed with a full stop.
  • All the necessary rules of punctuation is followed here.

The correct answer is 'very happy and amused'.

Key Points

• The underlined idiom 'tickled pink' means 'to be very pleased, excited or happy about something'.
• In the given sentence, the infant became very happy and excited on seeing his mother.
• It refers to one's face turning pink with laughter when one is being tickled.
• Thus, 'very happy and amused' is the correct answer.

Additional Information

• The given idiom 'tickled pink' is based on colours.
• Here are some other idioms based on colours:

• Tickled pink: दिल बाग बाग होना
• Meaning: बहुत अधिक खुश होना

Concept :

Displacement (x): The  change in position of an object is called displacement.

• Displacement is  a one-  dimensional quantity that  represents the smallest separation between two defined points.
• The standard unit of displacement in the International System of Units (SI) is the meter (m).

Velocity (v) : The rate of change of displacement is called velocity. It is a vector quantity. 

• The SI unit of velocity is called m/s and the CGS unit is called cm/s.

• The slope of the displacement-time graph gives the velocity.
  Instantaneousvelocity(v)=
  

  Maths:

• body displacement,
  
  With the question that when the body is coming to rest , the final velocity, v, is zero  

The answer to this question is 24s. 

CONCEPT:

• Simple harmonic motion: A periodic motion in which the restoring force on the object is opposite in direction and directly proportional to the object's displacement.

​Restoring force (F) = - k x

Where k is a constant and x is the displacement from the mean position.

• Amplitude: The maximum displacement of the object from equilibrium, either in the positive or negative x-direction.
• Time Period: The time in which the object completes one oscillation called time period.

The angular frequency ω in terms of the time period is given by:

ω = 2π/T

where ω is the angular frequency and T is the time period.

For spring-mass SHM, angular frequency ω of the object is also given by:

ω =

where ω is the angular frequency, m is the mass of the object and K is the spring constant.

• Acceleration: Acceleration on the moving object is directly proportional to the object's displacement vector and the opposite of displacement in direction.

The maximum value of acceleration is given by:

a_max = Aω²

where A is the amplitude of oscillation and ω is the angular frequency.

CALCULATION:

Given that m = 10 kg; K = 1000 N/m; A = 10cm = 0.1m

ω == 

ω = 10 radian per sec

amax = Aω2

amax = 0.1 × 10²

amax = 10 m/s²

So the correct answer is option 1.

CONCEPT:

• Equation of a transverse wave is given by;

⇒y=Asin(kx−ωt)

where A is the amplitude, k the wavenumber, and ω the angular frequency.

EXPLANATION:

• It is clear from the equation

• That the oscillations in a transverse wave are perpendicular to the direction of motion of the wave.
• A longitudinal wave travels in the direction of its oscillations. Therefore option 1 is correct.

The correct answer is Joule.

Key Points

• Joule is a unit of energy and is indicated by 'J' in MKS System.
• It is expressed as the work required to produce one watt of power for one second.
• Joule is the unit of work/energy; in the International System of Units or (SI).

Additional Information

• Work done is said to be 1 Joule, when a force of one newton actually moves a body through a distance of one meter in the direction of applied force.
• Erg is the absolute unit of work or energy on the CGS system.
• The relation between joule and ergs is 1 Joule = 10⁷ ergs.
• The MKS system of units is a physical system of measurement that uses the meter, kilogram, and second (MKS) as base units.
• Other important systems are: CGS (centimeter, gram, and second) and FPS (Foot, Pound, Second)

It has a tetrahedral structure is NOT correct.

Confusion Points

• Graphite has a tetrahedral structure that is NOT correct about graphite.
• The structure of the diamond is tetrahedral with each of the carbon atoms is joined to the other four carbon atoms in a regular tetrahedral pattern.
• Graphite is a naturally occurring form of crystalline carbon. Its atoms are arranged in a hexagonal structure.

Key Points

• Graphite, archaically referred to as plumbago, is a crystalline form of the element carbon.
  • Graphite is a naturally occurring form of crystalline carbon.
  • Its atoms are arranged in a hexagonal structure.
  • It is extremely soft, cleaves with very light pressure, and has a very low specific gravity.
  • Under high pressures and temperatures.
    • it converts to diamond.
  • It is a native element mineral found in metamorphic and igneous rocks.
• Property of graphite :
  • Graphite has carbon atoms arranged in sheets of the hexagon and has sp2 hybridization.
  • Carbon uses only 3 electrons in bonding and hence 1 electron is spare.
  • Graphite has a high melting point.
  • It is an allotrope of carbon.​
  • Graphite is insoluble in water and organic solvents.
  • This free electron of each carbon atom in graphite is responsible for the conduction of electricity.
• Graphite in Igneous Rocks and Meteorites:
  • Small amounts of graphite are known to occur as a primary mineral in igneous rocks.
  • It is known as tiny particles in basalt flows and syenite.
  • It is also known to form in pegmatite.
  • Some iron meteorites contain small amounts of graphite.

CONCEPT:

• Acceleration Due to Gravity: The force of attraction exerted by the earth on a body is called gravitational pull or gravity.
  • We know that when a force acts on a body, it produces acceleration. Therefore, a body under the effect of gravitational pull must accelerate.
  • The acceleration produced in the motion of a body under the effect of gravity is called acceleration due to gravity, it is denoted by g.
• If g is the acceleration due to gravity, then-

Where G = universal gravitational constant, M = mass of the earth and R = radius of the earth.

EXPLANATION:

Given - R1 ∶ R2 = 1 ∶ 4 and ρ1 ∶ ρ2 = 1 ∶ 2

• Acceleration due to gravity is,

As mass = volume × density

Hence,

Since g, π, G is constant.

• Hence, acceleration due to gravity for the first planet,

 ---(1)

• Hence, acceleration due to gravity for the second planet,

 ---(2)

Divide equation (1) with (2), we get

CONCEPT:

• Drift velocity is the average velocity attained by a charged particle in a conductor under an applied electric field and is given by

CALCULATION:

Given - ρ = 9 gm/cm³ = 9 × 10³ Kg/m³, I = 1.1 A, d = 1 mm , radius, r = 0.5 mm = 0.5 × 10^-3 m , M = 63 = 63 × 10^-3kg, and N_A = 6.023 × 10²³

• The charge density of the copper is given by

• Hence, option 3 is the answer

Gravitational force between two bodies F = G Mm/r2G Mm/r2. The value of force exerted on m due to M will be equal to that of M due to m. so, the ratio will be 1;1.

Concept:

A point (h, k) lies inside a closed curve F(x, y) ≡ 0 if F(h , k) < 0

Calculation:

Given ellipse 4x2 + 9y2 - 36 = 0 and the circle x2 + y2 - 9 = 0

Given points A(1, 2) and B(2, 1)

Substitute point A in the equation E, we have

⇒ E = 4 × 1²+ 9 × 2² - 36 = 4, hence point A lies outside the ellipse.

Substitute point A in equation C,

⇒ C = 1² + 2² - 9 = - 4, hence the point A lies inside the circle.

Substitute point B in the equation E,

⇒ E = 4 × 22+ 9 × 12 - 36 = - 11, hence point B lies inside the ellipse.

Substitute point B in equation C,

⇒ C = 22 + 12 - 9 = - 4, hence the point B lies inside the circle.

Hence point A lies inside C but outside E.

The correct answer is option (4).

Explanation:

Composition of function: When the function f(x) is substituted in the function g(x), the composite function formed is represented by (g o f)x. It can be termed as “g of f of x".

Concept:

Explanation:

Concept:

General equation of line :- ax² + 2hxy + by² + 2gx + 2fy + c = 0

Equation represents pair of straight lines:- abc + 2fgh - af² - bg²- ch² = 0

Calculation:

We have,

⇒ hxy + gx + fy + c = 0

On comparing with general equation, we get

⇒ a = 0, h = h/2, b= 0, g = g/2, f = f/2, c = c

⇒ abc + 2fgh - af2 - bg2- ch2 = 0

Putting all the values in the equation, we get

⇒

⇒

⇒ fg - ch = 0

⇒ fg = ch

∴ If the equation hxy + gx + fy + c = 0; h ≠ 0 represents a pair of straight lines, then fg = ch.

The correct answer is Jammu and Kashmir.Key Points

• A pilgrimage to the Amarnath cave, a Hindu shrine in Jammu and Kashmir, India, is known as the Amarnath Yatra.
• The cave is located 141 kilometres (88 miles) from Srinagar at a height of 3,888 metres.
• From Pahalgam town, a commute can be taken to get there.
• Every year, thousands of Hindu devotees travel to the Amarnath cave.

Additional Information

• Amarnath Yatra
  • According to tradition, Queen Suryamathi gave this temple banalingas, Trishul, and other holy symbols in the eleventh century AD.
  • In addition to this, there are numerous other references to this temple in our prehistoric writings.
  • The beginning of this yearly pilgrimage yatra is "Pratham Pujan."
  • The yatra requires devotees to go on foot the entire time.

The correct answer is North-East.

Key Points

• The Tripuri people of the Bru Reang tribe perform the folk dance known as hojagiri.
• It is performed in the state of Tripura, India.
• A team of four to six ladies and young girls do it while singing, balancing on an earthen pitcher, and controlling various props like a bottle on top of the head and an earthen lamp in one hand.
• while the body is only moved in the lower half.
• Other folk dances of North-East:
  • Garia, Jhum, Maimita, Masak Sumani and Lebang boomani dances of Tripuri community,
  • Bijhu dance of Chakma community,
  • Cheraw and Welcome dances of the Lusai community
  • Hai-Hak dance of the Malsum community,
  • Wangala dance of Garo Community.

Additional Information

The Correct Answer is Diamond city
Key Points:

• Surat is famous for its diamond cutting and polishing and is known as the Diamond City of India.
• 90% of all diamond cutting and polishing on the planet takes place in Surat.

Important Points:

• Surat is a port city situated on the banks of the Tapi River.

Additional Information:

The correct answer is 1940, Lahore.

Key Points

• The resolution was first called the Lahore resolution which afterwards became the Pakistan Resolution, was presented on 24 March 1940.
• This resolution was drafted by Sikandar Hayat Khan and presented on 23 March 1940 by Fazlul Haque.
• This was a statement drafted by 25 members of the working committee of all Indian Muslim League and it was drafted between 22 March 1940 and 24 March 1940.
• It was presented by Quaid-e-Azam (Muhammad Ali Jinnah) and the crux of the statement was the demand for a separate land for Muslims where they can practice their religion freely and the land was named the Islamic Republic of Pakistan.

Additional Information

• Mohammad Ali Jinnah served as the leader of the All-India Muslim League from 1913 until Pakistan's independence on August 14, 1947.
  • He is popularly known as 'Quaid-I Azam' or 'Great Leader'.
  • Jinnah became the president of the Muslim League in 1916.
• Lucknow Pact (1916) between the INC headed by Tilak and All-India Muslim League led by Muhammad Ali Jinnah for Hindu-Muslim unity in the nationalist struggle.

Utility, in ordinary sense, means usefulness. But, in economics, it means want-satisfying power of a commodity or service — the power to satisfy a human want. Utility is addable. One can add utility obtained from each unit of a commodity to get total utility obtained from the entire stock. In other words, by adding marginal utility from successive units, we obtain total utility of the stock.