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 '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 '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.

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. 

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

Concept:

• The Law of Conservation of Energy states that the total energy of an isolated system remains conserved (constant), that is, it can neither be created nor be destroyed but it can be transformed from one form to another.
• One of the most common examples of the Law of Conservation of Energy is: water is stored at a height with some gravitational potential energy, when the water starts flowing downward then its potential energy is converted into kinetic energy.
• Whereas different forms of energy can be given as

Explanation:

• From the above given explanation, we had seen different forms of energy and their examples
• Now according to the given condition, the energy of an object when heated is known as thermal energy which is an example of kinetic energy because of motion of its particles.
• The energy of book resting on top of the table is an ideal example of potential energy.
• The energy of movement is an object is an example of Mechanical energy and it is an example of kinetic energy because of its motion.
• The energy of chemical bond (covalent bond) is an example of Chemical potential energy.
• Thus, option a and c are correct among all.

Oxygen is a by-product of photosynthesis in plants. Unlike urea and uric acid, which are nitrogenous wastes in animals, oxygen is considered a waste product of the photosynthesis process in plants.

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:

Number of ways of choosing r objects from n objects = nCr =

Calculation:

The number of ways of forming a committee with atleast one woman

= Total number of ways of forming the committee - (ways of forming a committee with no woman)

If a five-membered committee consists of no woman,

⇒ The committee consists of exactly 5 men and 0 women.

Number of ways of choosing 5 men from 6 men

⇒ 6C5 =  = 6

And the total number of ways of choosing 5 members from 10 members (6 men and 4 women)

⇒ 10C5 =  = 252

⇒ The number of ways of forming a committee with atleast one woman = 252 - 6

⇒ The number of ways of forming a committee with atleast one woman = 246

∴ The correct answer is option (2).

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.

Concept:

• Here we have to use the multiplication properties of the matrixes.

We know that,

(A + B)2 = (A + B) (A + B)

⇒ (A + B)2 = A2 + AB + BA + B2

Calculation:

Given:

• We know that,

AI = IA as I is an identity matrix so using the above result,

⇒ (aI + bA)2 = a2I² + b2A² + 2ab AI

= a2I2 + b2A2 + 2abA

⇒ (aI + bA)2 = a2I + 2abA

So, option 2 is correct.

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 Option 2.

Key Points

• Vitamin B3, also known as niacin or nicotinic acid, is one of the eight B vitamins. It plays a crucial role in the proper functioning of the body and is involved in various metabolic processes.
• Here are some key points about vitamin B3:
  • Function: Niacin is essential for the conversion of carbohydrates, fats, and proteins into energy.
  • Sources: Niacin can be obtained from both animal and plant sources.
  • Forms: Niacin exists in two forms: nicotinic acid and niacinamide (nicotinamide).
  • Deficiency: Severe niacin deficiency leads to a condition known as pellagra.
  • Recommended Daily Intake: The recommended daily intake of niacin varies depending on age, sex, and life stage.

Additional Information

• Vitamin B1, also known as thiamine, is one of the eight B-vitamins that play essential roles in maintaining the proper functioning of our bodies
• Vitamin B2, also known as riboflavin, is one of the water-soluble vitamins belonging to the B-complex group. It plays a crucial role in maintaining overall health and is involved in various metabolic processes in the body.

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 4 Kcal.

Key Points

Calorie:

• It is a unit of energy.
• Specific definition is a calorie is the amount of energy, or heat, it takes to raise the temperature of 1 gram of water 1 degree Celsius.
• One calorie is equal to 4.184 joules.
• We associate calories with food, but they apply to anything containing energy.
• For example a gallon of gasoline contains about 31,000,000 calories.
• Carbohydrates provide 4 calories per gram, protein provides 4 calories per gram, and fat provides 9 calories per gram.

Protein:

• It is a chain of amino acids joined by peptide bonds in a specific sequence.
• Protein is an essential nutrient. There is no life without protein. Protein is contained in every part of your body, the skin, muscles, hair, blood, body organs, eyes, even fingernails and bone. Next to water, protein is the most plentiful substance in your body.

Structures of protein:

• Proteins catalyze metabolic reactions, power cellular motion and forms structural integrity to hair, bones, tendons and teeth.
• Human proteins therefore reflects the sophistication and diversity of their biologic roles.
• Therefore, maturation of a newly synthesized polypeptide into a biologically functional protein

• Requires folding into a specific three-dimensional arrangement, or conformation.

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.

The correct answer is Markanda.

Key Points

• Aruna is the ancient name of Markanda river.
  • ​The Markanda river flows in Sirmaur district, Ambala district, and Markanda town in Kurukshetra district.
  • The river flows through Haryana and Himachal Pradesh.
  • The Markanda river originates from the Shivalik hills.
  • The total length of the river is 120 km out of which 90 km is in Haryana.
  • A barrage at Jalbehra in Kurukshetra district has been built on the river.
  • The Begna river is the main tributary of the Markanda river.

Important Points

• The Sahibi River originates in Jaipur Distt. of Rajasthan and it passes through Alwar Distt. 
  • It drains into the Yamuna at Delhi, where its channelled course is also called the Najafgarh drain, which also serves as Najafgarh drain bird sanctuary.
• The Ghaggar River rises in Shivalik hills in the Solan district of Himachal Pradesh.
  • It enters Haryana from the Panchkula district.
  • And at the end, the river leaves Sirsa District of Haryana State and reaches Sri Ganga Nagar district, Rajasthan.
  • Kaushalya river is a left bank tributary of Ghaggar River.
• Yamuna River is the largest tributary of the Ganga River.
  • It originates from Yamunotri Glacier.
  • It meets the Ganges at the Sangam (where Kumbh Mela is held) in Prayagraj, Uttar Pradesh after flowing through Uttarakhand, Himachal Pradesh, Haryana and Delhi.
  • Length: 1376 km
  • Important Dam: Lakhwar-Vyasi Dam (Uttarakhand), Tajewala Barrage Dam (Haryana) etc.
  • Important Tributaries: Chambal, Sindh, Betwa and Ken.