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

The correct answer is: The sales manager, Mr. Jayaram, is in a meeting.

Key Points

• We use comma in case of Apposition to show the designation or the post of the person.
• The post, description or designation is placed just after the name by using a comma.
  • For example: Kaushal, the captain of our team, played a crucial role in today's match.
• ​In options 1 and 4, the use of apostrophe is incorrect as possessiveness shouldn't be mentioned in these contexts.
• In option 2, the use of inverted commas is incorrect. Also, comma is not used correctly in this context.
• Thus, the correct answer is Option 3.

​Therefore, the correct sentence is: The sales manager, Mr. Jayaram, is in a meeting.

The correct answer is, 'altar'.

Key Points

• The word that suitably fills the blank is a noun which means a place of worship.
• Altar is a place where something is worshipped or sacrificed to.
  • Synonym- sacred area or sanctuary.
    • Example- The priest delivered the sermon at the altar.
• Hence, option 4 is the correct answer.

Therefore, the complete sentence is -'She prayed at the altar'.

Additional Information

• alter- to change the form or structure.
• ultra- extreme.
• older- senior.

The correct answer is: on the contrary.

Key Points

• 'On the contrary' means opposite to something in nature.
  • Ex. It doesn't seem ugly to me; on the contrary, I think it's rather beautiful.
• 'Chilly' means cold.
• The context of the sentence suggests that the thing wasn't hot; in fact, it was really cool. Both hot and chilly are used for the same thing.
• Hence, a word which shows opposition to the other should be used in the blank.

​Therefore, the correct sentence is: No, it wasn't hot, on the contrary, it was quite chilly.

Additional Information

• Nevertheless means in spite of; not withstanding; despite something that has just been mentioned or said.
• Moreover means in addition to something. It is used to mention additional facts.
• Besides means in addition to.

The correct answer is 'aren't I'.

Key Points

• A short question following a sentence is called a question tag.
• When the statement is positive, we use a negative question tag and vice versa.
• However, if the main verb or auxiliary verb in the statement is 'am', the negative question tag usually is 'aren't I'?
  • For eg.- I'm going to get a positive response, aren't I?
• We will therefore use the question tag 'aren't I?' to fill in the blanks.

The complete sentence will be: I am the recipient of the best all-rounder award, aren't I?

• Hence, option 4 is the correct answer.

Additional Information

• When the verb in the statement is present simple or past simple and is positive.

• And there is no auxiliary verb in the statement.

• Here, we use don't, doesn't or didn't.

  • For eg.- Jenni eats white sauce pasta, doesn't she?

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 '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 'Option 2' i.e. 'Challenging'.

Key Points

• The most appropriate word to fill in the blank is "challenging".
• "Challenging" means demanding or testing the abilities of (someone or something).
• In this context, choosing the right software indeed could be a complex and demanding task.

Therefore, the correct sentence is: Choosing the right software for any purpose can be a challenging task for any business.

Additional Information

• Now, explaining the other options:
  • Intimating- This means to imply or make known indirectly. It does not fit in this context. You wouldn't describe a task as "intimating."
  • Flickering - This means to shine with a light that is not steady; twinkle. Typically used to describe light, it does not make sense to describe a task as "flickering."
  • Attributing - This means to regard something as being caused by or belonging to. In this context, the word "attributing" does not make sense, because it does not correctly describe a characteristic of a task.

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.

The correct answer is 3.

Key Points

Isomers:

• Chemical compounds that have identical chemical formulae but differ in properties and the arrangement of atoms in the molecule are called isomers.
  • Therefore, the compounds that exhibit isomerism are known as isomers.
• Such structural isomers which differ in chain of carbon atoms are known as chain isomers.

​Pentane:

• Pentane is an organic compound that is a clear colourless liquid.
• The odour of pentane is similar to petroleum.
• It is less dense than water and is insoluble in water. It is also known as quintane and n-pentane.
• The rotatable bond count of pentane is 2.
• Molecular Formula: C₅H_12.

​​Isomers Of Pentane: There are three structural isomers of pentane and they are:

• n-pentane is the first isomer which is a straight chain with a normal structure of pentane.

• 2-methylbutane is the second isomer which is a branched-chain structure in which one carbon atom is connected to three other carbon atoms.

• 2,2-dimethylpropane is the third isomer which is a branched-chain structure in the central carbon atom connected to four other carbon atoms.

​

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

The correct option is 1.

CONCEPT:

Human eye:

• The organ due to which we can see the world is called the human eye. It consists of a convex lens/converging lens.
• The image by the human eye lens form at the retina. Since the image formed on the retina is a real image due to the convex lens. So it is real and inverted.
• It is passed on to the brain through the optic nerve which processes the image as erect so that we can see objects as they are, and not upside down.
• Hence the image that is formed on the retina of the human eye is real and inverted. It is the brain that makes us show it as straight and not inverted.

​

Defects of the human eye:

The various Defects associated with eyes:

Concept:

Using mirror formula:

1v+1u=1f

Calculation:

Given u = -30cm , f = - R/2 = - 42/2 = - 21cm,

Hence the screen should be placed 70cm in front of the mirror in order to obtain a sharp image.

Hint

• The focal length for a concave mirror is negative because all the parallel rays reflecting from the mirror surface converge in front of the mirror and for a convex mirror focal length is positive because parallel rays converge inside the mirror virtually
• Conventionally left side of the mirror is taken is the negative and the right side is taken as positive, where parallel rays come from the left side.

Formula used :

Property of definite integral =  .... if f(-x) = f(x) or it is an even function ---- (1)

Calculations :

Now,

=  + ∫0π2sin xdx

=

= [ 1 - cos (-π/2)] - [cos(π/2) - cos 0]

= [1 - cos(π/2)] - [0 - 1] (∵ cos (- x) = cos x)

= [1 - 0 ] - [- 1]

= 1 + 1

= 2

∴ The value of .

Concept Used:-

The value of limit at x→a will define only when the right-hand limit and left-hand limit at a will be equal.

Explanation:-

Given function is,

(x) =

Here, the right-hand limit (RHL),

Also, the left-hand limit (LHL),

Now, we have given that  f(x) exists. Thus,

⇒ LHL = RHL

⇒ 2 - k = 3

⇒ -k = 3 - 2

⇒ -k = 1

⇒ k = -1

So, the value of k is -1.

Hence, the correct option is 4.

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).

Concept:

Principal value of cosec^-1θ is

cosec[cosec^-1x] = x

Calculation:

Let,

y =

⇒ cosec y = - √2

⇒ cosec y = cosec(−π4)

∴ Principal value is −π4.

Additional Information
Principal Values of Inverse Trigonometric Functions:

Concept:

The solution of the linear differential equation  is given by

y × I.F =

Where P and Q are the functions of 'x' and I.F =

Explanation:

Given differential equation an be written as

⇒  which is linear.

So IF =

Option (2) is correct

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.

Formula used:

1. Midpoint of coordinates (x₁, y₁) & (x₂, y₂)

=

2. The equation of passing through (x₁, y₁) and slope m is

y - y₁ = m(x - x₁)

3. If the slope of two perpendicular lines is m₁ & m₂ then

m₁ × m₂ = -1

Calculation:

Let slope of the projection line (L) is m.

We know that line joining the PQ will be perpendicular to line L.

The slope of line PQ × Slope of line L = -1

⇒ −2−22+6 × m = -1

⇒ m = 2

Coordinates of the midpoint of PQ i.e. R

=  = (-2, 0)

Also, the line (L) will be passing through R.

Hence, equation of line L

= y - 0 = 2(x + 2)

⇒ 2x - y + 4 = 0

The correct answer is South Africa.Key Points

• Mahatma Gandhi returned to India in the year 1915, from South Africa.

Mahatma Gandhi:

• He was Born on 2 October 1869.
• He died on 30 January 1948.
• He was undoubtedly a great man, both in personal force and in political effect.
• He was an Indian Lawyer, politician, social activist, and writer who molded the character of the struggle for freedom in India, and impressed his own ideals upon the new governing class that came into power when the English went home.
• Mahatma Gandhi returned to India from South Africa on 9 January 1915 at the request of Gopal Krishna Gokhale.
• After arriving in India, Mahatma Gandhi successfully organized Satyagraha Movements in various places.
• Gandhiji's return from South Africa can be seen as perfect timing for the future development of the Indian national movement.
• Gokhale helped Gandhiji at the time of hardships in raising funds when Gandhiji was in South Africa.
• Gokhale insisted to Gandhiji that he had been far away from his nation.
• He wanted Gandhiji to come to India and know the situation in India under British Rule.

The correct answer is "Kerala".

Key Points

• The Sabarimala Temple is a Hindu pilgrimage center located in the state of Kerala in southern India. It is one of the most famous and revered temples in India, dedicated to Lord Ayyappa, who is considered a deity associated with the principles of celibacy, penance, and devotion. The temple is located atop a hill called Sabarimala in the Periyar Tiger Reserve in the Western Ghats mountain ranges of Kerala.
• Sabarimala is known for its unique pilgrimage traditions and practices. The temple is open for worship only during a specific period known as the "Mandala Makaravilakku" season, which usually falls between November and January. The pilgrimage involves strict observance of fasting, abstinence from certain activities, and a rigorous trek through dense forests and steep hills to reach the temple. The pilgrimage attracts millions of devotees from all over India, and the temple is known for its distinct rituals, customs, and festivities associated with the pilgrimage.

Additional Information

The Sabarimala Temple has been a center of controversy in recent years due to debates around issues of gender equality and religious practices. In 2018, the Supreme Court of India lifted the ban on entry of women of menstruating age (10-50 years) into the temple, which was previously restricted based on certain traditional beliefs. This decision sparked widespread protests and debates on various aspects, including religious traditions, women's rights, and constitutional rights. The Sabarimala Temple continues to be a significant religious and cultural landmark in Kerala and India, attracting devotees and tourists alike.

The correct answer is Param Veer Chakra.

Key Points

• The highest military award in Indian Defence Services is Param Veer Chakra.
  • ​Gallantry Award is meant for exceptional courage, valour and dignity.
  • In India, Gallantry awards are given to the personnel of the forces for their exceptional bravery.
  • After Independence, the three Gallantry awards came into force i.e. the Paramvir Chakra, the Mahavir Chakra and the Veer Chakra.
  • The Gallantry awards are announced twice in a year i.e on Republic day and on Independence day.
  • The order of Precedence of these awards is
    • Param Vir Chakra
    • Ashoka Chakra
    • Mahavir Chakra
    • Kirti Chakra
    • Vir Chakra
    • Shaurya Chakra

Additional Information

• Param Vir Chakra:
  • The Param Vir Chakra is awarded for the most conspicuous bravery or some daring or pre-eminent act of valour or self-sacrifice, in the presence of the enemy, whether on land, at sea, or in the air.
  • Param Vir Chakra means "Wheel of the Ultimate Brave".

The correct answer is Ibrahim Lodi.

Key Points

• Ibrahim Lodi.
  • He was the last Sultan of the Delhi Sultanate.
  • He became Sultan in 1517 after the death of his father Sikandar Lodhi.
  • In 1526, the Mughal forces of Babur, the king of Kabulistan defeated Ibrahim's much larger army in the Battle of Panipat.
  • He was killed in this battle.

Additional Information

• First Battle of Panipat( 1526)
  • The First Battle of Panipat was fought between the invading forces of Babur and the Lodi Empire, which took place on 21 April 1526 in North India.
  • Babur defeated Ibrahim Lodhi in this battle.
  • It marked the beginning of the Mughal Empire.
  • This was one of the earliest battles involving gunpowders firearms and field artillery.
• Second Battle of Panipat (1556)
  • The Second Battle of Panipat was fought between the forces of Samrat Hem Chandra Vikramaditya, popularly called Hemu, the Hindu king who was ruling North India from Delhi, and the army of Akbar, on November 5, 1556.
  • It was a decisive victory for Akbar’s generals Khan Zaman I and Bairam Khan.
• Third Battle of Panipat( 1761)
  • The Third Battle of Panipat took place on 14 January 1761, at Panipat, about 60 miles (95.5 km) north of Delhi.
  • It was fought between a northern expeditionary force of the Maratha Empire and a coalition of the King of Afghanistan, Ahmad Shah Durrani with two Indian Muslim allies—the Rohilla Afghans of the Doab, and Shuja-ud-Daula, the Nawab of Oudh.
  • The Durrani Afghan forces and their allies finally won and defeated the Marathas.
• Babur
  • He is the founder of the Mughal Empire.
  • He fought the first Battle of Panipat in 1526 with Ibrahim Lodhi and laid the foundation of the Mughal Empire.
  • His autobiography Tuzuk-i-Babri was written in the Turkish Language.
  • In 1527 his general Mir Baki built Babri Maszid.
  • He died in 1530.
• Humayun
  • He was the son of Babur.
  • His autobiography Humayunama was written by his sister Gulbadan Begum.
• Bahlul Lodi
  • He was the chief of the Pashtun Lodi tribe.
  • He was the founder of the Lodi dynasty from the Delhi Sultanate.
  • He was involved in the trading of horses and once sold his finely bred horses to the Sayyid dynasty Sultan Mohammad Shah.

The correct answer is "Lord Ayyappa".Key Points

• The Sabarimala Temple is a Hindu pilgrimage center located in the state of Kerala in southern India.
• It is one of the most famous and revered temples in India, dedicated to Lord Ayyappa, who is considered a deity associated with the principles of celibacy, penance, and devotion.
• The temple is located atop a hill called Sabarimala in the Periyar Tiger Reserve in the Western Ghats mountain ranges of Kerala.
• Sabarimala is known for its unique pilgrimage traditions and practices. The temple is open for worship only during a specific period known as the "Mandala Makaravilakku" season, which usually falls between November and January.
• The pilgrimage involves strict observance of fasting, abstinence from certain activities, and a rigorous trek through dense forests and steep hills to reach the temple.
• The pilgrimage attracts millions of devotees from all over India, and the temple is known for its distinct rituals, customs, and festivities associated with the pilgrimage.

Additional Information

• The Sabarimala Temple has been a center of controversy in recent years due to debates around issues of gender equality and religious practices.
• In 2018, the Supreme Court of India lifted the ban on entry of women of menstruating age (10-50 years) into the temple, which was previously restricted based on certain traditional beliefs.
• This decision sparked widespread protests and debates on various aspects, including religious traditions, women's rights, and constitutional rights.
• The Sabarimala Temple continues to be a significant religious and cultural landmark in Kerala and India, attracting devotees and tourists alike.

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 Malaria.

Key Points

• Plasmodium is a genus of parasitic protozoa that is responsible for causing malaria, a serious and potentially life-threatening disease.
• Malaria is primarily transmitted through the bite of infected female Anopheles mosquitoes.
• When an infected mosquito bites a human, it injects Plasmodium parasites into the bloodstream.
• Once inside the human body, the Plasmodium parasites travel to the liver and multiply.
• They then infect and destroy red blood cells, leading to the characteristic symptoms of malaria.
• These symptoms can include high fever, chills, sweating, headache, muscle aches, fatigue, nausea, and vomiting.
• There are several species of Plasmodium that can infect humans, including P. falciparum, P. vivax, P. malariae, and P. ovale.
• Among these, P. falciparum is the most severe and can lead to life-threatening complications, particularly in young children and individuals with weakened immune systems.

Additional Information

• Common cold: The common cold is primarily caused by various types of viruses, most commonly rhinoviruses. Other viruses that can cause the common cold include coronaviruses, respiratory syncytial virus (RSV), adenoviruses, and parainfluenza viruses.
• Typhoid: Typhoid fever is caused by the bacterium Salmonella enterica serovar Typhi. It is typically contracted by consuming food or water contaminated with feces containing the bacterium. Poor sanitation and hygiene practices contribute to its spread.
• Pneumonia: Pneumonia can have various causes, including bacterial, viral, or fungal infections. The most common cause of bacterial pneumonia is Streptococcus pneumoniae. Viral pneumonia can be caused by influenza viruses, respiratory syncytial virus (RSV), adenoviruses, and others. Fungal pneumonia is often associated with specific fungi, such as Pneumocystis jirovecii in immunocompromised individuals.