Indian Navy Agniveer Mock Test - 1 - Indian Navy Agniveer MCQ

The correct answer is "The best way to prepare for tomorrow is doing your best for today".
Key Points

• Let's have a look at the first line of the first paragraph:
  • "It has been said that the best preparation for tomorrow is doing your best for today."
• ​After a complete analysis of the above statement, it can be concluded that according to the passage, the best way to prepare for tomorrow is doing your best for today.
• Therefore, "The best way to prepare for tomorrow is doing your best for today" is the correct option here.

​​Important Points

• Let us see the meaning of "Today" and "Tomorrow":
  • Today: this present day.
  • Tomorrow: the day after today.
• Let us frame a sentence with the words "Today" and "Tomorrow":
  • Today is your rest day so please take care of yourself.
  • Tomorrow is going to be a special day.

The correct answer is "More than half of OECD countries are planning to use green budgeting tools to integrate green perspectives in recovery packages".
Key Points

• Let's have a look at the second line of the last paragraph:
  • "Preliminary results of an OECD survey show that over half of OECD countries plan to use green budgeting tools to integrate green perspectives in recovery packages."
• ​After a complete analysis of the above statement, it can be concluded that preliminary results of an OECD survey display that preliminary results of an OECD survey show that over half of OECD countries plan to use green budgeting tools to integrate green perspectives in recovery packages.
• Therefore, option 3 is the correct option here.

​​Important Points

• Let us see the meaning of "Budgeting":
  • Budgeting: the process of creating a plan to spend your money.
• Let us frame a sentence with the word "Budgeting":
  • Below is a simple framework for budgeting that we have broken-down into 11 main areas.

The correct answer is 'a few'.

Key Points

• The context of the sentence tells that there were some(not many) people on the beach because they were not alone.
• The appropriate determiner to use in this sentence depends on the context and how small the number of people is.
• "a few" is a determiner that means a small number. It means not many (some). It is used in affirmative sense.
  • Example: A few farms were dotted about in the valley.
• Therefore, it is appropriate to use in this sentence because it indicates that there were some people on the beach, but not many.
• Hence, option 2 is the correct answer.

• ​​The word "few" refers to a small number of something. It means hardly anyone/anything. It is used in negative sense.
• "very little" refers to a small quantity or amount of something that is uncountable, such as water or time. Thus, it is not appropriate to use with "people".
• "fewer" and "fewest" are used to compare the number of people to another group.
  • For example, "fewer people than yesterday" or "the fewest people of any day this week".
  • They are not appropriate in this sentence because there is no comparison being made.

The correct answer is 'the, an.'

Key Points

• The only articles in English are ‘the’ and ‘a/an’.
• 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.
• For the first blank, the correct answer is "the" as we are talking about the particular time "morning."
• We use "an" before some abbreviations which start with "H, L, M, N, F, R, S, X, etc."
  • Example: He is an MLA.
• So we need "an" in the second blank.
• Hence, the correct answer is Option 3.
  ​​

The correct answer: "A few years ago, thirty­-nine people witnessed a brutal attack."

Key Points

• We use commas( , ) to separate independent clauses.
• We must include a comma ( , ) if the introductory word or phrase is followed by a dependent clause.
  • Example: Tomorrow, if you want to go out or something, just call me.
• ​So, we need a comma after the phrase "a few years ago".
• We need a hyphen ( - ) when we write cardinal numbers from 21 upwards and there's no space between the letters and hyphen.
  • Example: Twenty-nine, twenty-two
• ​Therefore, the correct answer is Option 2.
  ​

Correct sentence: A few years ago, thirty­-nine people witnessed a brutal attack.

The correct answer is "since".

Key Points

• Primarily, a conjunction is a word that joins words, phrases, and clauses together.
• Let's understand the implication of the correct conjunction:
• Since: We employ it to offer an explanation for something. It is used to insert a subordinate clause as a subordinating conjunction.
  • Example: Since his apartment was close enough for him to walk, Sean had no need to take a taxi.
  • She chose to travel alone since her spouse abhorred holidays so much.
• It is apparent from the above explanation that "since" is the correct conjunction for this sentence.
• Therefore, the correct sentence is: Since I have been working all night, I feel tired.

Additional Information

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 'Must.'

Key Points

• A Modal is a type of verb that is used to express modality such as permission, request, obligation, advice, etc.
• There are several types of modal verbs such as may, might, ought to, should, can, etc. The use of these modal verbs varies.
  • ​​​Example: You can't meet her.
• Modal auxiliaries must and have to can be used to express a firm obligation or necessity.
• Must is usually for personal obligation and "have to" be used for the general obligation.
  • ​Example: You must come to the office at 10 O'clock.
• In the given sentence, there is a personal obligation shown which is only expressed by "must".
• All the other options are eliminated because of this reason.

Hence, option 3 is the correct answer.

Complete Sentence: He must apologise for his mistake.

Additional Information

• 'Will' and 'Shall' is used to express promise.
  • ​Example: I will always remember you.
• Modal auxiliaries will, shall, can, and must can be used to express certainty.
  • ​Example: She must have reached.
• Might: It is the past tense of May. It is used to express very little possibility or much doubt. May is used in expressing normal possibility or doubt.
  • Example: It might rain. (very little possibility).
• Need: Need is used to denote necessity.
  • Example: I need a pen.

The correct answer is 'might'.

Key Points

• In this context, 'might' is used to express a possibility or uncertainty.
• 'Will' would suggest certainty, which contradicts the fact that he has not worked hard.
• 'Can' refers to ability, not to possibility in this context.
• 'Do' is not a modal verb and is not used to express possibility.

Therefore, the correct answer is Option 2.

Concept:

Conduction:

• It is the process by which heat energy is transmitted through collisions between neighboring atoms or molecules.
• It occurs more readily in solids and liquids, where the particles are closer together than in gases, where particles are further apart.
• The rate of heat flow is the amount of heat that is transferred per unit of time in some material, usually measured in watts (joules per second).
• Formula, rate of heat flow, Qt=kAΔTa,
• Where, ΔT = difference in temperature, A = area, k = thermal conductivity, a = thickness of the conductor, Q = heat, t = time

Calculation:

Given,

Thickness, a = 20 cm = 0.2 m, Area, A = 0.04 m2, Temperature difference, ΔT = 200ºC,

Thermal conductivity, k = 109 J/(s m K)

The rate of heat flow through the sheet can be calculated as,

Qt=4360 J/s

CONCEPT:

• Viscosity: The state of being sticky, thick, and semi-fluid inconsistency, due to internal friction of fluids is called viscosity.
• Newton's Formula of the coefficient of viscosity:
• According to this formula, force is proportional to contact area A and velocity gradient
  

where η is the coefficient of viscosity, A is the contact area and is velocity gradient.

CALCULATION:

Given that Δv = 2 m/s; Δz = 1 mm = 10-3 m; A = 10-2 m2; η = 1 poise = 10-1 Ns/m²

Force required to drag the plate:

F = 2 N

So the correct answer is option 3.

The correct answer is option 3) i.e. 

Concept:

Escape velocity is the minimum velocity with which a body is projected from the surface of the planet so as to reach infinity, by overcoming the pull by gravity.
Escape velocity at the surface of a planet is given by:

Where,

G = gravitational constant (6.67 × 10-11 Nm2/kg2), M = mass of the planet and R = radius of the planet.

Acceleration due to gravity g is obtained from balancing the equation of force with the equation of gravitational force.

Where M is the mass of the earth, m is the mass of an object, R is the radius of the earth, and G is the gravitational constant.

On comparing both the equations, we get

Explanation:

Given that:

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:

An alternating current is an electric current that reverses direction periodically

• The general equation is given by
• I = i₀ sin (ωt)
• I = i₀ cos (ωt)
• RMS means Root-Mean-Square of instantaneous current
  • 
  • I₀ = Peak current, ω = frequency, t = time
• The mean value or average value of a half cycle of an ac source
  • 
• The mean value of AC cycle is 0

Explanation:

RMS means Root-Mean-Square of instantaneous current,

 --- (1)

The mean value or average value of a half cycle of an ac source,

 --- (2)

From equations (1) and (2), the ratio of the mean value over half cycle to the r.m.s. value is

⇒ImeanIrms=2I0πI0√2

Concept:

• A lift is designed to carry loads upwards easily and in a short span of time. This is achieved by accelerating the lift upwards.
  • Hence, the acceleration of lift is positive in the upward direction and negative in the downward direction.
  • The downward motion of the lift is the stopping motion and hence it is retarding.
  • The lift motion can be simplified into two cases:

Case 1: Lift moving up with acceleration 'a'

Net force acting on the lift = N1 - Fg = ma

Case 2: Lift moving down with acceleration 'a'

Net force acting on the lift = N1 - Fg = m(-a)

Where Fg is the weight of the object of mass 'm', N1 is the reaction force due to the mass.

Calculation:

Given that:

Mass of the student, m = 56 kg

Acceleration of the lift, a = 4 m/s²

Weight of the student, F_g = mg = 56 × 10

Net force acting on the lift, ma = N1 - Fg

⇒ N₁ = ma + mg = m (g + a) = 56 (10 + 4) = 784 N

The correct option is 784 N

Additional Information

The correct answer is human beings do not have cellulose-digesting enzymes.

Explanation:

• Cellulose-rich food substances are a good source of roughage for human beings because human beings do not have cellulose-digesting enzymes.
• Cellulose is a polymeric polysaccharide consisting of only one type of monosaccharide i.e., glucose.
• Cellulose plays an important role in the human body because it is an excellent source of fiber.
• Except for cellulose, enzymes secreted from the human mouth, liver, and stomach can digest any type of sugar.
• Cellulose is digested by the enzyme cellulase which is absent in human beings.
• Humans do not have the cellulose-digesting enzyme (cellulase) to degrade the beta-1, 4 glycosidic bonds of cellulose.
• Thus, it cannot be digested by humans and acts as a good source of roughage.
• Roughage helps our body to get rid of undigested food.

Additional Information

• A balanced diet provides all the nutrients that our body needs, in the right quantities, along with an adequate amount of roughage and water.
• The major nutrients in our food are carbohydrates, proteins, fats, vitamins, and minerals.
• In addition, food also contains dietary fibers and water.
• Carbohydrates and fats mainly provide energy to our body.
• Proteins and minerals are needed for the growth and maintenance of our body.
• Vitamins help in protecting our bodies against diseases.

CONCEPT:

Photoelectric effect:

• When the light of a sufficiently small wavelength is incident on the metal surface, electrons are ejected from the metal instantly. This phenomenon is called the photoelectric effect.

Stopping potential:

• It is defined as the potential required to stop the ejection of an electron from a metal surface when the incident beam of energy is greater than the work function of the metal.

Work function:

• It is the minimum amount of energy required so that metal emits an electron. It is represented by ϕ.
• Einstein’s equation of photoelectric equation:

⇒ KEmax = E - ϕo

Where E = incident energy of photons, ϕo = work function, and KE = maximum kinetic energy of electrons.

Calculation:

Case 1: When 5eV is incident

5eV = W + 2eV

W = 3eV

Case 2: When 6eV is incident

6 = 3 + K.E

K.E = 3 eV

To stop the electron, a negative potential is required whose magnitude is the equivalent voltage is (3V)

Hence stopping potential = -3V

Concept: 

Here we have used concept of AND, and NAND gate concepts.

If two inputs A, B are connected in And gate then the output can be written as: Y = A.B   ----- (1)

In the case of the NAND gate when we connect two inputs A and b then output is: 

Calculation:

Given:

Here in this circuit, we have labeled it as 1,2,3 part of circuit having outputs Y1, Y2, and C. 

Y1 = solution of first two input NAND gate, Y2 = solution of second two input NAND gate

C = solution of third AND gate connecting both NAND gates as two inputs

From the circuit diagram, we can see that 

when B = 0 then C = 1, B= 1 then C = 0 so that solution is completely independent on A.

So, the truth table is: 

 

CONCEPT:

Permanent magnet:

• Substances that at room temperature retain their ferromagnetic property for a long period of time are called permanent magnets.
• Permanent magnets can be made in the following ways:
  1. By holding an iron rod in the north-south direction and hammer it repeatedly.
  2. By holding a steel rod and stroke it with one end of a bar magnet a large number of times.
  3. An efficient way to make a permanent magnet is to place a ferromagnetic rod in a solenoid and pass a current.
• The hysteresis curve allows us to select suitable materials for permanent magnets.
• The hysteresis curve should be tall and wide for the material that is used to make a permanent magnet.
• The material that is used to make a permanent magnet should have high retentivity and high coercivity.
• Steel is a one-favored choice to make a permanent magnet.
• Other suitable materials for permanent magnets are alnico and cobalt steel.

EXPLANATION:

• The material that is used to make a permanent magnet should have high retentivity and high coercivity.
• Steel has a slightly smaller retentivity than soft iron but this is outweighed by the much smaller coercivity of soft iron. Hence, option 2 is correct.

Explanation:

Let, θ = tan^-1 x

⇒  = x

⇒ sin θ = x cos θ

⇒ sin θ =

⇒ sin θ =

⇒ sin θ =  --- [ Since x = tan θ ]

Now, sin (tan^-1 x) = sin θ

⇒ sin (tan^-1 x) =

The correct answer is option (4).

Concept:

AM, GM, HM Formulas:

If A is the arithmetic mean of numbers a and b and is given by

⇔

If G is the geometric mean of the numbers a and b and is given by

⇔

If H is the Harmonic mean of numbers a and b and is given by

⇔

Relation between AM, GM and HM

1. G2 = AH

2. AM ≥ GM ≥ HM

Calculation:

Given that,

p = tan2 x + cot2 x

Let a = tan2 x, b = cot2 x

we know that,

AM ≥ GM

We know that, tan θ × cot θ = 1

⇒ P ≥ 2

Hence, option (2) is correct.

Concept:

1) For three vectors to be coplanar, their scalar triple product should be zero.

2) Scalar triple product of vectors  and  is denoted by .

Calculation:

Given vectors are λî + ĵ + 2k̂, î + λĵ − k̂ and 2î − ĵ + λk̂

For the three vectors to be coplanar, their scalar triple product is zero.

⇒  = 0

⇒ λ(λ² - 1) - (λ + 2) + 2(- 1 - 2λ) = 0

⇒ λ³ - 6λ - 4 = 0

⇒ (λ + 2)(λ² - 2λ - 2) = 0

Therefore, the vectors are coplanar for λ = - 2.

The correct answer is option 1.

Given:

log10 a = p and log10 b = q

Concept used:

1. log a^x = x log a
2. log ab = log a + log b
3. log () = log a - log b

Calculation:

log10 a = p and log10 b = q

According to the above concept used,

⇒ log10 (aP bq) = log₁₀ a^p + log₁₀ b^q

⇒ p log₁₀ a + q log₁₀ b

⇒ p(p) + q(q) = p² + q²

∴ The required value is p² + q².

The correct answer is cotton.

Key Points

• Black soil
  • It has occasionally been referred to as "regur," a word derived from the Telegu word "Regada." This soil is a product of the erosion of basalt from the Deccan Highlands.
  • Black soil, with its clayey characteristics, is crucial for growing cotton. High moisture retention is necessary for cotton farming.
  • Black soils are very fine-grained, black, and very argillaceous. They also contain high amounts of magnesium and calcium carbonates. They are extremely sticky and tenacious of moisture when wet.
  • They also have fair amounts of lime, magnesia, and alumina, as well as a significant abundance of iron.
  • Because this soil is most suited for the cotton crop, it is primarily referred to as black cotton soil.​​​

Additional Information

• Black soil is also good for growing crops including peanuts, wheat, tobacco, chilies, and jowar in addition to cotton.
• Organic matter, phosphorous, and nitrogen are insufficient in black soils.
• The beidellitic and montmorillonitic classes of clay minerals are often abundant in the soils.
• It is located in the Deccan trap and lava plateaus which reach south-east along the Godavari and Krishna basins and include the plateaus of Malwa, Maharashtra, Saurashtra, Chattisgarh, and Madhya Pradesh.​

The correct answer is Bimal Patel.Key Points

• Bimal Patel is an Indian architect, urbanist, and academician. He is the founder and principal architect of HCP Design, Planning and Management Pvt. Ltd., an Ahmedabad-based architecture firm.
• Patel has designed a number of notable buildings in India, including the Sabarmati Riverfront Development Project, the Kashi Vishwanath Temple Corridor Project, and the new Parliament Building in New Delhi.
• The new Parliament Building in New Delhi is a 64,500 square meter complex that was inaugurated by Prime Minister Narendra Modi on May 28, 2023.
• The building is designed to be earthquake resistant and to have a lifespan of more than 150 years.
• It is also designed to be energy efficient and to use sustainable materials.
• Patel's design for the new Parliament Building was selected from a pool of 10 shortlisted architects.
• The jury praised Patel's design for its "timeless elegance" and its "ability to reflect India's rich cultural heritage."
• The new Parliament Building is a significant addition to India's architectural landscape.
• It is a symbol of India's democracy and its commitment to sustainable development.

Additional Information

• Herbert Baker was an English architect who designed a number of notable buildings in India, including the Secretariat Building in New Delhi and the Viceroy's House (now Rashtrapati Bhavan).
• Ram V Sutar is an Indian sculptor who is known for his monumental sculptures, including the Statue of Unity in Gujarat.
• Brinda Somaya is an Indian architect who is the founder and principal architect of Somaya & Associates, an architecture firm based in Mumbai.
  • Somaya has designed a number of notable buildings in India, including the National Gallery of Modern Art in Mumbai and the NCPA Centre in Mumbai.

The correct answer is the People’s Liberation Army.

Key Points

• People’s Liberation Army is the Chinese Army’s name and is the World’s largest Military Force. It is the Armed force unit of the Chinese Communist Party.
• Chinese Army consists of Five parts Ground Force, Navy, Air Force, Rocket Force, and Strategic Support Force. It was founded on 1 August 1927.

Additional Information

The question mark (?) in the given figure will complete the pattern with the given below image-

Here, missing image is similar to Option (4).

Hence, Option (4) is correct answer.

Position values of letter, according to English alphabet series:

Logic: Sum of digits of position values is coded word's position values.

Similarly,

Hence, the correct answer is "EABEI".

The correct answer is Natal Indian Congress.

Key Points

• Natal Indian Congress (NIC):
  • The Natal Indian Congress (NIC) was established by Gandhi in 1894.
  • Its main aim was to fight for the rights of the Indian community in South Africa.
  • The NIC sought to combat discriminatory legislation and practices that targeted Indians.
  • It served as a unified platform for Indians to voice their concerns and grievances.
  • The NIC played a crucial role in mobilizing the Indian community in South Africa for civil rights.

Additional Information

• Gandhi In South Africa (1893 AD-1914AD):
  • 1893 AD: Departure of Mahatma Gandhi to South Africa.
  • 1906 AD: First Civil Disobedience Movement (Satyagraha) against Asiatic Ordinance in Transversal.
  • 1907 AD: Satyagraha against compulsory registration and passes for Asians (The Black Act) in Transversal.
  • 1908 AD: Trial and imprisonment– Johannesburg Jail (First Jail Term).
  • 1914 AD: Quits South Africa forever and returns to India. Was awarded Kaisar-i-Hind title for raising an Indian Ambulance Core during Boer wars.

The logic here followed is

Hence, the correct answer is "option 2".