Indian Navy SSR Mock Test - 7 - Airforce X Y / Indian Navy SSR MCQ

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 solution is 'waiting'.

Key Points

• Finite verbs are those verbs that agree with the subject and express the mood, tense, number and person.
• On the other hand, non-finite verbs do not agree with the subject and can be used in the present participle, past participle or infinitive forms to perform different functions in a sentence.
• It is non-finite if it is used: without the verb having a tense or with no agreement between the subject (if there is one) and the verb. Typically they are infinitive forms with and without to (e.g. to go, go), -ing forms and -ed forms (e.g. going, gone):
• In the given sentence, the verb 'waiting' has no agreement with the subject 'you' .
• Hence, the correct solution is Option 3.

The correct answer is 'mice.'

Key Points

• The meaning of the word 'Mise' is the issue in a legal proceeding upon a writ of right also: the write itself.
• The plural of the noun 'mouse' is 'mice.'
• Hence, the noun, 'mice' should be used to make the sentence grammatically correct.
• Hence, the correct answer is 'mice.'

​Correct sentence: It's totally irrational, but I'm frightened of mice.

Additional Information

• Most singular nouns are made plural by simply putting an -s at the end.
  • To make regular nouns plural, add ‑s to the end.
    • Example: cat – cats
  • If the singular noun ends in ‑s, -ss, -sh, -ch, -x, or -z, add ‑es to the end to make it plural.
    • Example: truss – trusses, marsh – marshes, blitz – blitzes
  • In some cases, singular nouns ending in -s or -z, require that you double the -s or -z prior to adding the -es for pluralization.
    • Example: fez – fezzes, gas –gasses
  • If the noun ends with ‑f or ‑fe, the f is often changed to ‑ve before adding the -s to form the plural version.
    • Example: wolf – wolves
  • If the singular noun ends in ‑us, the plural ending is frequently ‑i.
    • Example: cactus – cacti

• 'माईस (Mise)' शब्द का अर्थ है समझौते के अनुसार बन्दोबस्त।
• 'माउस (Mouse)' संज्ञा का बहुवचन 'mice' है।
• इसलिए, वाक्य को व्याकरणिक रूप से सही बनाने के लिए संज्ञा 'mice' का प्रयोग किया जाना चाहिए।
• इसलिए, सही उत्तर 'mice' है।​

Concept:

• Ohm's law: It states that the voltage across a conductor is directly proportional to the current flowing through it, provided all physical conditions and temperature, remain constant.
• Mathematically, current-voltage can be written as V = IR, where V = Voltage, I = Current, R = Resistance
• For equivalent resistance in parallel combinations
  • 

• For equivalent resistance in series combinations

  • ​R_eq = R₁ + R₂ + . . . . + R_n

• ​Current Division rule:
  • ​
  • The current flow through the resistor R₁,
  • The current flows through the resistor R₂,

Calculation:

Given, Resistance, R₁ = 8 Ω , R₂ = 24 Ω,Battery, V = 12 volt

The resistor is connected in parallel combination,

In parallel combination,

R_P = 6 Ω

Now, the resistance R_P is connected in series with 14Ω,

R_eq = 6 + 14 = 20 Ω

Current in the circuit,

The current flowing in the 8 Ω is calculated as,

Hence, the current in the 8 Ω resistor is 0.45 A.

CONCEPT

Logic gates:

• It is an electric circuit, which works on simple Boolean algebra to perform a logical operation for one or more binary inputs that produce a single binary output.

Types of Logic gates:

AND Gate: If both the inputs are high, it produces a high output.

• The Boolean algebra for AND gate is X = A. B

OR gate: If any of the input is high, it produces a high output.

• The Boolean algebra for OR gate is X = A + B

NOT gate: It inverts the input. Whatever the input is given, it changes its value at the output.

• The Boolean algebra for NOT gate is X = X̅

EXPLANATION:

• In AND gate the output is 1 only when both the input is 1.
• So, If the output is 1 then,

A = 1 and B = 1.

• Hence, option 1 is correct.

Concept:

Work done in the Polytropic process is given by:

W1-2 =

Calculation:

Given:

PV2= Constant, P1 = 320 kPa, V1 = 0.04 m3, P2 = 80 kPa.

W1-2 =

P2 = 0.08 kPa

W = 6.4 KJ

Concept:

Blackbody: A body which absorbs all radiations incident on it is called a perfectly black body.

Wien's displacement law: The blackbody radiation curve for different temperatures peaks at a wavelength inversely proportional to the temperature.

Wien’s displacement law

CONCEPT:

Heat engine:

HE : Heat Engine

TH : Temperature of Source / Hot reservoir and TL : Temperature of Sink / Cold Reservoir

Q1 : Heat absorbed from Source and Q2 : Heat rejected to Sink

W : Work Done

• The efficiency(η) of a heat engine is defined as:

Now, W = Q1 - Q2

CALCULATION:

Given - efficiency (η) = 0.75 and Heat rejected to Sink (Q₂) = 40kJ = 40 × 10³ J

• The efficiency(η) of a heat engine is defined as:

⇒η=1−Q2Q1

The above equation can be written as

⇒Q1=40×1031−0.75=160×103=160kJ

• The amount of work done is

⇒ W = Q1 - Q2

⇒ W = 160kJ - 40kJ = 120 kJ

Explanation:

Valency: It is the combining capacity of an element to form bonds by sharing electron pairs to make stable chemical compounds.

Stability: It is the property of resistance of a molecule or compound to not react with other molecules, elements and compounds

Important Points

Magnesium:

• Magnesium is an element with the atomic number 12.
• It has the symbol Mg.
• It is a metal and thus its valency is +2.
• Its melting point is 650°C and its boiling point is 1090°C.
• Magnesium is the eighth-most abundant element.

Nitrogen:

• Nitrogen is non-metal with atomic number 7.
• It occurs in gaseous form as dinitrogen.
• It has electronic configuration 1s22s22p3.
• Its valency is either -3 or -5.
• Its melting point is -210°C and its boiling point are -195.8°C.

Silicon:

• Silicon has atomic number 14.
• It is represented with the symbol Si.
• Its melting point is 1410°C and its boiling point is 3265°C.
• It shows the valency of -4 or +4.

Argon:

• It is a chemical element with the atomic number 18.
• It is a Nobel gas and hence its valency is 0.
• It is in group 18 of the periodic table.
• Argon is the third most abundant gas in the Earth's atmosphere (0.094%)
• Uses: Fluorescent Lightning, Gas Discharge Tubes, Fluorescent Glow Starters.

Order of valencies:

Ar < Mg < N < Si

CONCEPT:

• Young's modulus is the ratio between normal stress to longitudinal strain and is given as

Where F = Force, L = Length, A = Area,Δ l = Change in length,

CALCULATION:

Given: Y = 2 × 10¹¹ N/m², m = 1 Kg, L = 1m , A = 1 mm² = 1 × 10^-6 m², Δ L = ?, and F = mg = 1 × 10 = 10 N

The young modulus of the material is given by

\The above equation can be rewritten for ΔL as

Substituting the given value in the above equation:

⇒ Δ L = 0.05mm

Hence, option 3 is the answer

CONCEPT:

The efficiency of the Carnot cycle (η):

• It is defined as the ratio of net mechanical work done per cycle the gas (W) to the amount of heat energy absorbed per cycle from the source (Q1) i.e.,

 
As work done by the engine per cycle  is

Where Q1 = amount of heat energy absorbed per cycle from the source and Q2 = energy absorbed per cycle from the sink.
           

Where T1 = temperature of the source and T2 = temperature of the sink.

• First, we need to find the sink temperature.
• after obtaining the sink temperature we have to put its value in the efficiency formula and find the new source temperature.

EXPLANATION:

Given - η = 40 % = 0.4 and temperature of the source (T₁) = 500 K

• The efficiency of the Carnot engine:

The temperature of the sink is 300 K.

Now Step: 2

Desired - η_D = 40 % = 0.4 and temperature of the sink (T2) = 833 K

Let's say T'₁ is the new source temperature.

• The efficiency of the Carnot engine:

• The temperature of the new source is 750 K.

The correct answer is F5.

Key Points

• To start a slide show:
  • There are several ways you can begin your presentation:

Click the Start From Beginning command on the Quick Access Toolbar, or press the F5 key at the top of your keyboard.

The presentation will appear in full-screen mode.

• Clicking the Start From Beginning command on the Quick Access Toolbar
• Select the Slide Show view command at the bottom of the PowerPoint window to begin a presentation from the current slide.
• Switching to Slide Show view from the Status bar in the lower-right corner
• Go to the Slide Show tab on the Ribbon to access even more options.

From here, you can start the presentation from the current slide and access advanced presentation .

• Starting a presentation from the Slide Show tab

Explanation:

AC generator:

• An electric generator is a device that is used to convert mechanical energy into electric energy.
• It is also known as a dynamo.
• An electric generator works on the Electromagnetic Induction Principle.
• The Principle of Electromagnetic Induction states that when a conductor is connected with a changing flux, it will induce an emf across it. The value of induced emf across the conductor depends on the rate of change of flux connected with the conductor.

Galvanometer:

A moving coil galvanometer is an electromagnetic device that can measure small values of current. It consists of permanent horseshoe magnets, coil, soft iron core, pivoted spring, non-metallic frame, scale, and pointer.

Transformer:

A Transformer is used to convert low voltage (or high current) to high voltage (or low current) and high voltage to low voltage.

It works on the principle of electromagnetic induction.

The primary coil has Np turns and the other coil, called the secondary coil, has Ns turns.

Generally, the primary coil works as the input coil and the secondary coil works as the output coil of the transformer.

Metal detector:

Ultrasound can't travel through a metal element. So it is used as a metal detector also. It works on the principle of resonance in an AC circuit

∴ (A) - (II), (B) - (I), (C) - (IV), (D) - (III)

Hence option 1) is the correct choice.

CONCEPT:

Logic Gates:

• The logic gates are used in electronic circuits that give a certain output for a given set of Inputs.
• and which is based on a certain logic.
• Input and output are in binary form that is 1 and 0.
• It is based on certain Logic.
• Some basic logic gates are AND gate, OR gate, NOT gate.
• To build digital logic we develop a combination of these gates.

AND Gate:

• If both the inputs are high, it produces a high output.
• The Boolean algebra for AND gate is X = A. B
• It means that if any of the input of A and B is zero, the output will be zero.
• If both are one, the output will be one.

NOT gate:

• It inverts the input. Whatever the input is given, it changes its value at the output.
• The Boolean algebra for NOT gate is X = X̅

EXPLANATION:

NAND Gate:

• The NAND Gate is formed by the combination of AND gate and NOT gate.
• The output obtained from AND Gate is simply reversed.

• The output of the NAND Gate is similar to the output in the question.

So, the correct option is NAND Gate.

Additional Information

OR gate:

• If any of the input is high, it produces a high output.
• The Boolean algebra for OR gate is X = A + B

Concep

• The relation between kinetic energy and momentum is given as,  where P = momentum, m = mass

Kinetic energy:

• The energy possessed due to the motion of an object is called kinetic energy.
• Formula, Kinetic energy,  where m = mass, v = velocity
• The SI unit of kinetic energy is Joules (J).

Momentum:

• It is defined as the product of mass and velocity.
• Formula, P = mv, where m = mass, v = velocity, P = momentum
• The SI unit of the momentum is kg m/s.

Calculation:

Given,

The momentum of a bulet, P = 10 kg m/s

The mass of the bullet, m = 20g

The kinetic energy of the bullet is calculated as,

Hence, the kinetic energy of the bullet is 2500J.

Given:

Mean of 4, 9, 8 and x + 2 is 7 and mean of 20, 3, 8, x + 2, y + 2 is 11

Concept Used:

Mean =

Solution:

Mean =

⇒ 7 =

⇒ x = 5

Mean = 20+3+8+x+2+y+25

⇒ 11 =

⇒ 55 = 35 + x + y

⇒ 20 - x = y

⇒ y = 15 {putting the value of x = 5}

 Option 4 is correct.

Concept Used:

Every point on the parabola is equidistant from a point (focus) and a line (Directrix).
, is the equation of a parabola with vertex (h, k) and (a, 0) focus and the axis of the parabola is parallel to the x-axis.

Calculation:

A T Q : curve is equidistance from (4,0) and the y-axis

Hence curve is a parabola with focus (4,0) and directrix: x = 0 (y-axis).
vertex = (2,0) [the midpoint of focus and origin]

Hence, the required equation is given by:

⇒(y−0)2=4×2(x−2)
⇒y2=8x−16

⇒y2−8x+16=0

Concept:

Integration by parts: If f and g represent two functions, then the integral of the product of f and g is given by:

Calculation:|

Total income of the year = 5 × 21,000 + 4 × 24,000 + 3 × 12,000 + 1,80,000 = 4,17,000

Hence, Option B is correct.

The correct answer is Pound Sterling.

Key Points

• Pound Sterling
  • The United Kingdom and nine of its affiliated territories use Pound sterling as their currency.
  • The pound is the primary unit of sterling and is frequently used interchangeably with "pound sterling" in international contexts.
  • The oldest currency that is still in circulation and has been used continuously since its origin is the sterling.
  • After the US dollar, the euro, and the Japanese yen, it is currently the fourth most traded currency on the foreign exchange market.

Additional Information

• Dollar
  • Since the end of World War II, the dollar has served as the primary reserve currency for the whole world and is the most often used currency for international trade.
• Yen
  • Japan's national currency is the yen.
  • After the US dollar and the euro, it is the third most traded currency on the foreign exchange market.
  • In addition, it is frequently used as a third reserve currency in place of the euro and the US dollar.
• Rand
  • The Southern African Common Monetary Area, which includes South Africa, Namibia (with the Namibian dollar), Lesotho (alongside the Lesotho loti), and Eswatini, uses the South African rand as its official unit of exchange (alongside the Swazi lilangeni).

The correct answer is Dr Samir V Kamat.

Key Points

• Distinguished Scientist Dr Samir V Kamat has been appointed as the new chairman of the Defence Research and Development Organisation (DRDO).
• Kamat will succeed Dr G. Satheesh Reddy who has been appointed as Scientific Adviser to Defence Minister.
• Earlier, Dr Kamat was Director General of Naval Systems & Materials at DRDO since July 2017.

Additional Information

• The Defence Research and Development Organisation is the premier agency under the Ministry of Defence of the Government of India.
• It is charged with the military's research and development in India.
• DRDO:
  • Founded: 1958
  • Headquarters: New Delhi
  • Motto: "Strength's Origin is in Science"

The correct answer is India.

In News

• India wins Junior Asia Cup, beats Pakistan 2-1 in June 2023.
• It was held in Salalah, Oman.

Key Points

• India defeated Pakistan 2-1 to lift Men's Junior Asia Cup 2023
• India registered a close 2-1 win over arch-rivals Pakistan in the final
• This was India's fourth title at Men's Junior Asia Cup.
  • India had won the tournament three times previously, in 2004, 2008, and 2015.
• Pakistan has won the tournament three times: in 1987, 1992, and 1996.

Additional Information

• Hockey:
  • The Hockey World cup is organised by the International Hockey Federation (FIH) once in four years.
  • The headquarters of FIH is located in Lausanne, Switzerland.
  • ‘Blackheath Rugby and Hockey Club’ was the first hockey club in the world that was set up in the year 1861 in England.
  • The first Hockey World Cup was organised in Barcelona (Spain) in 1971 and the winner was Pakistan.
  • India took part in Olympics for the first time in the year 1928 (in Amsterdam Olympics).
  • In Olympics, India has won the hockey title a maximum of eight times.
• Terminologies associated with Hockey are Bully Sudden death, Short corner, Hat trick, Goal, Penalty Corner, Penalty, stroke, pushing, Cut, Dribble, Scoop, Centre forward, Half back, Astroturf, Left in, Left out, Off-side, Tie breaker, Carried, Stick, Striking circle, Undercutting, etc.

The correct answer is Polo.

Key Points

• Operation Polo is referred to as ‘Police Action’ against the state of Hyderabad.
• It was a five days long military action that Indian Union took against Hyderabad.
• The battle began on 13th September and ended on 18th September 1948.
• The Indian forces outnumbered the Nizam’s army.
  • After the 5th day, Nizam’s army surrendered to the Indian army and Hyderabad became a part of the Union of India.

Additional Information

• In India, the Kargil conflict is popularly referred to as Operation Vijay which was the name of the Indian operation to clear the Kargil sector.
• ‘Operation Smile’ is a special drive pioneered by home minister Rajnath Singh.
  • This initiative has seen different state police and women and child department step up efforts to rescue missing children, with Haryana and Maharashtra taking the lead. 19,000 missing children rescued from slavery, and abuse through a special initiative.

The correct answer is France.

In News

• Multilateral military exercise Orion began at Mont de Marsan airbase.

Key Points

• The multilateral military exercise Orion has commenced at the Mont de Marsan airbase in France on April 18, 2023.
• The exercise involves the participation of troops and aircraft from several countries, including India, France, and the United States.
• The exercise will feature various scenarios and missions, such as air-to-air combat, air-to-ground operations, and search and rescue missions.

Additional Information

• India:
  • Currency: Indian rupee (INR)
  • Capital: New Delhi
• France:
  • Currency: Euro (EUR)
  • Capital: Paris
• USA:
  • Currency: United States dollar (USD)
  • Capital: Washington, D.C.
• Russia:
  • Currency: Russian ruble (RUB)
  • Capital: Moscow

Arrangement of heights according to the given information:

(1) Shweta is taller than Anu.

Shweta > Anu

(2) Vani is smaller than Dev.

Dev > Vani

(3) Tanu is Taller than Vani and smaller than Samar.

Samar > Tanu > Vani

(4) Anu is taller than Samar.

Anu > Samar

(5) Dev is smaller than Anu.

Anu > Dev

Possible arrangement:

Shweta > Anu > Dev > Samar > Tanu > Vani

The position of Dev may vary with Samar and Tanu.

Here, Shweta is the tallest among all.

Here, the correct answer is "Shweta".

The correct answer is When Climate Change Turns Violent.

In News

• Indian film ‘When Climate Change Turns Violent’ wins WHO award in June 2023.

Key Points

• The World Health Organization has announced the official selection of this year’s winning films at its 4th Annual Health for All Film Festival, held at WHO Headquarters, Geneva.
• A documentary titled ‘When Climate Change Turns Violent’ won a special prize in the ‘Health for All’ category at the 4th Annual Health for All Film Festival held at the World Health Organization (WHO) headquarters in Geneva.
• Vandita Saharia of Rajasthan directed the documentary, and she was the only Indian among the winners.
• The documentary deals with gender-based violence & climate change.

Additional Information

• List of films awarded:
  • UHC "Grand Prix": “Jonathan’s Miracle Feet” – Sierra Leone / Disability, clubfoot
  • Health Emergencies "Grand Prix": “Nurses facing Covid / Na Lihna de Frente” – Brazil / COVID-19 and access to care
  • Better Health and Well-being "Grand Prix": “One in 36 Million: Story of Childhood Lead Poisoning in Bangladesh” – Environmental health
  • Special Prize Sexual and Reproductive Health and Rights Film:“Vulvo and Dynia” – Israel / Vulvodynia
  • Student Film Prize:“Gasping for life” – Germany / Mental health, screens addiction, anxiety, depression
  • Special Prize Very Short Film:“Mirrors” – Sweden / Mental health, depression

The correct answer is Cairo.Key Points

• The capital city of Egypt is Cairo.
• It is located on the Nile River.
• The Nile is the longest river in Africa and the drainage basin of the Nile River covers 11 countries.
• The Nile is about 6,650 km in length.
• Cairo is the largest city in the Arab world.

Additional Information

• El Salvador:-
  • ​San Salvador is the capital and the largest city of El Salvador and its eponymous department.
  • It is the country's political, cultural, educational and financial centre.
• Berlin
  • Berlin is the capital of Germany and is located on Spree river.
  • Berlin is the largest city of Germany with regard to population and area.
  • Spree river flows through the states of Germany such as Saxony, Brandenburg and Berlin.
  • Spree river is about 400 km of length.
• Havana
  • ​Havana is the capital of Cuba.

The correct answer is “Ex Khaan Quest 2022”.

Key Points

• A Multinational Peacekeeping exercise “Ex Khaan Quest 2022” featuring participation from military contingents from 16 countries including India commenced in Mongolia on 6 June 2022.
• Indian Army is represented by a contingent from the LADAKH SCOUTS.
• Ukhnaagiin Khurelsukh, the President of Mongolia inaugurated the Exercise.
• The 14-day exercise is aimed at developing peace support operations.

Additional Information

• The fourth edition of the Indian Navy-Bangladesh Navy Coordinated Patrol (CORPAT) commenced on 22nd May.
• The patrolling drill commenced in the northern Bay of Bengal and would continue between May 22 and 23.
• List of Important Military Exercises:​

The correct answer is Nandini Gupta.

Key Points

• Nandini Gupta was crowned Miss India World 2023.
• The event was held at Imphal, Manipur.

• Delhi's Shreya Poonja was declared Femina Miss India 2023 first runner-up and Manipur's Thounaojam Strela Luwang emerged as the second runner-up.
• She was crowned by Karnataka's Sini Shetty, the Miss India winner of 2022.
• The event featured multiple rounds of fashion sequences featuring the 30-state winners dressed in a collection by Namrata Joshipura for Trends, Rocky Star and Robert Naorem showcasing traditional costume.