Air Defence (AD) Model Past Paper 2020 PDF

Verbal Reasoning

Q. Work-life balance schemes in the workplace have been __________ by employees and increase morale and ________ at work.
Answer: applauded, motivation
Q. How can HIFU enable the early release of patients from the hospital?
Answer: No cuts are required
Q. The new CEO pledged to deal with the company’s environmental issues.
Answer: Affirmed
Q. Butterfly → caterpillar : toad → ________
Answer: Tadpole
Q. Type of error in the sentence
Answer: Grammar
Q. Sand : Glass
Answer: Tree : Paper
Q. NEUTRAL means the same as…
Answer: Noncommittal
Q. Select the word that is spelled incorrectly
Answer: Retrieve
Q. The mine’s security engineer is the only source of authority…
Answer: False
Q. IMPERIOUS is the opposite of…
Answer: Subservient
Q. iron : Fe :: silver : Ag
Answer: Ag
Q. about : bout :: amend : mend
Answer: amend
Q. warm : hot :: amusing : hilarious
Answer: amusing
Q. train : trail :: grain : grail
Answer: train
Q. particular : fussy :: meek : subservient
Answer: meek
Q. mount : horse :: board : train
Answer: board
Q. tureen : soup :: goblet : wine
Answer: soup
Q. 4 : 6 :: 14 : 16
Answer: 14
Q. son : nuclear :: cousin : extended
Answer: cousin

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English

Was she sewing the curtains? (Passive Voice)
Answer: Were the curtains being sewed by her?
 He told me that he———– do this work.
Answer: could
 Even Children in the elementary schools ________ assigned homework.
Answer: are
Choose the correct verb: It is necessary for the government to ____ their people’s life better.
Answer: make
We were listening to the radio all evening. Which tense is this?
Answer: Past Continuous Tense
 He ______ from the East Indies and was ___________ in the Thames. (Past Indefinite)
Answer: came, drowned
 —————–raining outside?
Answer: it’s
Objectives limiting the meaning of a noun showing either possession, demonstration, or number are called.
Answer: Limiting
He has been waiting ________ 3 hours.
Answer: For
He knew Jinnah. (Passive Voice)
Answer: Jinnah was known to him

PHYSICS

Q. You have 20 inductors available each of 15 H. You need an inductor of 1H in a circuit. You achieve it by combination:
Answer: A) 15 inductors in parallel.
Q. A thermistor with negative temperature co-efficient is placed in a furnace. When temperature of furnace increases the resistance:
Answer: A) Decreases.
Q. In frequency modulation, the amplitude of carrier waves remain same but its frequency changes in proportion to:
Answer: A) The amplitude of modulating signals.
Q. Reception of particular radio station is selected by tuning knob which changes the:
Answer: B) Capacitance.
Q. Density of oxygen is about 16 times that of hydrogen. Therefore if speed of hydrogen is x, then speed of oxygen?
Answer: B) Less than x.
Q. When you drop a ball it accelerates at 9.8 m/sec². If you instead throw it downward then it accelerates immediately after leaving your hand assuming no air resistance:
Answer: A) 9.8.
Q. In an inelastic collision between two bodies, following is conserved?
Answer: B) Momentum.
Q. As the water falls from the tap, the cross sectional area should decrease according to?
Answer: A) Equation of continuity.
Q. AC voltage is passed through single diode rectifier, the output of the rectifier is:
Answer: B) Half wave DC.
Q. A Police motor cycle running at 140 km/hr sounds a siren of 2 Hz frequency while chasing a car at 150 km/hr. The apparent frequency heard by the car driver is:
Answer: B) Less than 2 Hz.
Q. If two NOT gates in parallel are attached to NAND gate in series, the gate formed is:
Answer: C) OR.
Q. In circuit X, L=100mH and C=100μF in series. In circuit Y, L=100mH and C=10μF in parallel, the resonating frequency fx, fy are related as:
Answer: B) fy = √10 fx.
Q. A transformer has 100 turns on input and 500 turns on output. If input is 220V and 5A. The output power is:
Answer: B) 1100 Watt.
Q. Truck (5000 kg) and Car (1000 kg) at 36 km/hr. Force to stop in 10 sec is X and Y. Difference is:
Answer: B) 4 KN.
Q. A tight wire is clamped at 2 m apart. Three longest wavelengths:
Answer: C) 4m, 2m, 1.33m.
Q. In optical fiber, angle of incidence i should be:
Answer: B) Greater than critical angle.
Q. Two spheres A and B (ra > rb) concentric with charge Q. Total flux passing normally:
Answer: C) Flux through both spheres is equal.
Q. Ratio of RMS speeds c1/c2 for masses m1, m2 at constant temperature:
Answer: A) √(m2/m1).
Q. A 500 kg rocket travels in deep space at constant 3000 m/s. Power produced by engine is:
Answer: D) None of these.
Q. Shell fired at 45° with 100 m/s. Time of flight (g=10):
Answer: B) 14 seconds.
Q. In an inelastic collision, the following is conserved:
Answer: D) Total energy and momentum.
Q. Young’s double slit experiment is used to study interference of:
Answer: D) Visible light.
Q. Need 2.5 kΩ from 20 kΩ resistors:
Answer: B) Eight 20 kΩ in parallel.
Q. Need 150 nF from 15 nF capacitors:
Answer: C) 10 capacitors in parallel.
Q. Which device does not use electromagnetic waves?
Answer: A) Ultra-sound machine.
Q. 1000 kg truck + 500 kg load. Power 2500W for 5 mins. Vertical height:
Answer: B) 50 m.
Q. Photoelectric effect – maximum energy of electrons depends on:
Answer: C) Wavelength of light.
Q. Truth table (00→0, 01→1, 10→1, 11→0) is for:
Answer: D) XOR gate.
Q. AC voltage fed into single diode. Output is:
Answer: B) Half wave rectified DC voltage.
Q. Heisenberg’s uncertainty principle: not possible to accurately measure:
Answer: A) Both position and momentum.

MATHEMATICS

Q. Asim is 3x Irfan. After 10 years, Asim is 2x Irfan. Asim’s age now:
Answer: C) 30.
Q. Solution of xdy+(y−1)dx=0:
Answer: B) x(y−1)=c.
Q. Max value of f(x,y)=x+3y given −x≤2,x≤3,y≤1:
Answer: D) (3,1).
Q. u=ai−j+k and v=i−2j+bk are collinear if:
Answer: B) a=1/2,b=2.
Q. Vectors u and v are perpendicular if:
Answer: C) a=1,b=−3.
Q. Circle with center (4,3) and radius 2:
Answer: D) x²+y²−8x−6y+21=0.
Q. Equation x²+(y−1)²/4=1 represents:
Answer: C) An ellipse with center at (0,1).
Q. Integral of 4sin(2x):
Answer: C) −2cos(2x)+c.
Q. Approximate value of sin(π/10):
Answer: D) π/10.
Q. Max area of right triangle with hypotenuse 5:
Answer: B) Both legs √12.5.
Q. Derivative of esinx cosx:
Answer: D) None of the above.
Q. Function f(x)=−x³+5 has:
Answer: C) An inflexion at x=0.
Q. Line through intersection of x+y−1=0 and x=0, parallel to x−y=0:
Answer: C) y=x+1.
Q. log(27)−log(9) is equal to:
Answer: D) None of the above.
Q. If y=2x, then dy/dx equals:
Answer: B) 2x ln2.
Q. Particle rest point (x=8t−2t²,y=12t−3t²):
Answer: C) (8,12,4).
Q. If f(x)=3x−1, then f⁻¹(x) is:
Answer: D) 1/3(x+1).
Q. Period of y=3sin(x/4):
Answer: B) 8π.
Q. If length of arc is L and radius is L, angle in radians is:
Answer: D) None.
Q. If sin(x)=cos(x), then x equals:
Answer: B) 7π/4.
Q. logx(x)=18:
Answer: A) 21/5.
Q. √4.1 approximates to:
Answer: A) 2.0.
Q. Probability Irfan picks a green toffee:
Answer: B) 8/27.
Q. Sum of series 2k³−k:
Answer: D) (2/3)×10¹⁰.
Q. Factor of f(x)=6x³−x²−4x−1:
Answer: C) (x−1) is a factor.
Q. Set S={−1,0,1}:
Answer: D) S is closed with respect to Multiplication.
Q. Additive inverse of 1/(3−i):
Answer: A) (−3+i)/10.
Q. Body moves v=50sin(πt). Value of X after 30 mins:
Answer: C) 0 km.
Q. Reduced row echelon form [1 0 0 0;0 1 0 0;0 0 1 0;0 0 0 1]:
Answer: B) Exactly one solution.
Q. Rank of matrix A:
Answer: D) Four.

CHEMISTRY

Q. Empirical formula of glucose:
Answer: B) CH₂O.
Q. Correct statement:
Answer: D) Both Options A and B are correct.
Q. Base principle of crystallization:
Answer: B) Solute soluble at high temp, crystals form on cooling.
Q. Bubbling of soda drink:
Answer: D) Decreased pressure causes gas to come out.
Q. Effect of pressure on density of gas:
Answer: C) Increase in pressure causes increase in density.
Q. Forces for liquefaction of Helium:
Answer: B) London dispersion forces.
Q. Sulphur in two forms is:
Answer: A) Allotropy.
Q. Boiling point of HF vs Water:
Answer: D) Formation of one hydrogen bond per molecule vs two.
Q. Electrons falling to n=1 in Hydrogen (Lyman series):
Answer: D) Ultra-Violet region.
Q. Structure of N₂:
Answer: D) Both options A and C are correct.
Q. Solubility of NaCl in water:
Answer: A) Hydration energy > Lattice energy.
Q. Enthalpy change (ΔH):
Answer: A) -130.10 kJ.
Q. First law of thermodynamics in cylinder:
Answer: D) All of the above.
Q. Heat applied to exothermic equilibrium:
Answer: B) Reaction moves in backward direction.
Q. NaCl not soluble in acetone because:
Answer: D) All of the above.
Q. Ethylene glycol as antifreeze:
Answer: D) All of the above.
Q. Oxidation number of S in SO₄²⁻:
Answer: A) +6.
Q. Purification of copper:
Answer: A) Impure Cu converts to ions and deposits on cathode.
Q. Purpose of two half cells:
Answer: B) Chemical reaction between solutions does not take place directly.
Q. Catalyst helps by:
Answer: D) Both Options A and B are correct.
Q. Sub-group “B” represents:
Answer: B) Transition elements.
Q. Electron added to Oxygen:
Answer: D) Both options A and C are correct.
Q. Usage of lime in agriculture:
Answer: C) For neutralizing acidic soils.
Q. Silicon atoms connected to one oxygen in Quartz:
Answer: C) 2.
Q. H₂S+NO₂→H₂O+S+NO. Here NO₂ is:
Answer: A) An oxidizing agent.
Q. HCOOH+H₂SO₄→CO+H₂O. Here H₂SO₄ is:
Answer: C) A dehydrating agent.
Q. Paramagnetic property:
Answer: D) Both A and B are correct.
Q. Hammering steel:
Answer: A) More carbon content in cutting tools makes them brittle.
Q. Alkanes less reactive than alkenes because:
Answer: D) All of the above.
Q. Property of PVC pipes:
Answer: D) Can be softened repeatedly.

Biology

Which one of the following is mismatched?
Answer: Proteases → Carbohydrate
Active site continuously changes it shapes until the substrate do not bind to it, is statement of ______?
Answer: Induce fit model
The point where the enzyme is most active is known as ______?
Answer: Optimum pH
 Metabolic reactions are _______?
Answer: Both A and B (constructive and destructive reactions)
All are characters of enzymes except?
Answer: Enzyme activity enhanced by inhibitors
 Phenomenon in which pair of homologous chromosome fails to separate called?
Answer: Non-disjunction
 Stage of meiosis in which centromeres shorten and the paired chromatids are pulled away from one another?
Answer: Anaphase-II
Stage of mitosis in which chromatids reach the poles and their movement ceases?
Answer: Telophase
A type of cell division in which spore mother cell produce spores?
Answer: Meiosis
Choose the incorrect statement regarding meiosis?
Answer: Production of new somatic cells from germ cells
Sequence of physiological changes by which cell commit suicide?
Answer: Apoptosis
Which process occurs during prophase of mitosis in an animal cell?
Answer: Formation of chromosomes and Separation of centrioles
Which of the following is mismatched?
Answer: Telophase → Nuclear membrane disappear
What occurs in metaphase of mitosis?
Answer: Chromosome line up on the equator of the cell
Select the mismatched one of the followings?
Answer: Ribosomes → Synthesis of steroids
Cell organelle found in animal cell and help intracellular digestion?
Answer: Lysosome
Trace the correct pathway of protein produce from protein factories?
Answer: Ribosomes → RER → Golgi body → Lysosome
Select the odd one of the followings?
Answer: Active transport
Secondary wall is made up of ______?
Answer: Cellulose and lignin
Which process allow movement in and out of cell?
Answer: All of these (Osmosis, diffusion and active transport )
 Which statement about the fluid mosaic model of membrane structure is correct?
Answer: The more unsaturated the fatty acid, the more fluid nature
What is a function of the rough endoplasmic reticulum?
Answer: Synthesis of protein
 What is responsible for the high resolution of the electron microscope?
Answer: Short wavelength of the electron beam

General Knowledge

Q. Which country uses “Yen” as their currency?
Answer: Japan
Q. Qantas is an airline of which country?
Answer: Australia
Q. Where is famous statute Christ the Redeemer?
Answer: Brazil
Q. What is the capital of Pakistan?
Answer: Islamabad
Q. The Largest Muslim country in the world by landmass/area is ____?
Answer: Kazakhstan
Q. Which is the smallest country in the world by land?
Answer: Vatican city
Q. The largest/biggest ocean of the world is ______?
Answer: Pacific
Q. WWW stands for ____?
Answer: World Wide Web
Q. What does the term “Crypto Winter” mean?
Answer: A prolonged decline in cryptocurrency prices
Q. Who is known as the father of computer?
Answer: Charles Babbage

Islamic Studies

Q. On 9th Zil Hajj, which Khutba is delivered at Nimrah Mosque?
Answer:  Second (Khutba-e-Arafat)
Q. About whom was Hazrat Jibraeel (AS) repeatedly urged to show kindness?
Answer: Neighbors
Q. What punishment did Allah send upon the nation of Aad?
Answer: Famine
Q. Which city was established after the Great Flood?
Answer:  Khosran (Qaryat-us-Samanin)
Q. Give the total number of Prophets/Messengers sent by Allah?
Answer: 124,000
Q. Where is the grave of Hazrat Ismail (AS)?
Answer: Makkah  (Saudi Arabia)
Q. Name the youngest son of the Holy Prophet (PBUH)?
Answer: Hazrat Ibrahim (AS)
Q. To which nation did Qaroon belong?
Answer: Bani Israel
Q. What is the main purpose of sending Prophets?
Answer: To guide humanity to the right path
Q. Which nation is called Ashab-ul-Hijr?
Answer: Thamud
Q. Who Urged Hazrat Adam ( A.S ) to taste Prohibited Tree?
Answer: Iblees
Q. In which Holy Book of Non-Muslims the Quran mentioned repeatedly?
Answer: Holy book of Sikh
Q. Prophet Abraham broke the idols with ________.
Answer: An Axe
Q. How many sons did Hazrat Adam (A.S) have?
Answer: 3
Q. Name the Prophet who was the first man to write?
Answer: Hazrat Idrees (A.S)
Q. When did the lady named Zainab poisoned Holy Prophetﷺ?
Answer: Conquest of Khyber
Q. Which prophet slept for 100 years?
Answer: Hazrat Uzair (A.S)
Q. Hazrat Nooh (AH) name mentioned in the Holy Quran _____ times.
Answer: 43
Q. Give the name of the prophet who is the son of Hazrat Daud (AS)?
Answer: Hazrat Suleiman (AS)

Pakistan Studies

Q. Who was the First Governor of West Punjab after independence?
Answer: Francis Modie
Q. The Lawyers’ Movement, also known as the Movement for the Restoration of Judiciary, was actually the restoration of ____?
Answer: Iftikhar Chaudhry
Q. Who was the first Foreign Minister of Pakistan?
Answer: Zafrullah Khan
Q. Who suspended the 1973 Constitution in 1977?
Answer: General Muhammad Zia-ul-Haq
Q. The Ojhri Camp incident occurred in which year?
Answer: 1988
Q. The Shimla agreement was signed between Zulfiqar Ali Bhutto and _______?
Answer: Indira Gandhi
Q. In 1997, a senior police officer, Muhammad Ashraf Marath, embraced Shahadat in a terrorist attack. Where did it take place?
Answer: Gujranwala
Q. Who was the First Governor of former NWFP at the time of independence of Pakistan in 1947?
Answer: Sir George Cunningham
Q. Malik Ghulam Muhammad abolished the Assembly of _____?
Answer: Muhammad Ali Bogra
Q. Rawalpindi Conspiracy Case was unearthed in which year?
Answer: 1951
Q. The first flight of the Shaheen in 1999 was fired from the _____ Base.
Answer: Sonmiani Naval
Q. Who was the first Pakistani boxer to win WBC Silver Flyweight Championship in 2016?
Answer: Muhammad Waseem
Q. Mr. Raza Rabbani served as the_____?
Answer: Chairman Senate
Q. When did Zia-ul-Haq become President?
Answer: 1978
Q. Kargil is in ______?
Answer: Held Kashmir
Q. The Objectives Resolution was made part of substantive provisions of the Constitution of 1973 ______?
Answer: By Presidential Order 14 of 1985 (Revival of Constitution Order)
Q. Imran Khan was sworn in as Pakistan’s _____ Prime Minister.
Answer: 22nd
Q. The only national elections held on non-party basis were in?
Answer: 1985
Q. Which conference was held from 27th November 1947 to 1st December 1947 in Pakistan?
Answer:  Education
Q. Pakistan ideology based on which theory?
Answer: Two nation theory
Q. Iftikhar Muhammad Chaudhry was restored as Chief Justice by the Supreme Court on _____?
Answer: 20 July 2007
Q. Which of the following Princely States was the first to formally accede to Pakistan?
Answer: Bahawalpur
Q. Malik Ishaq was the founder of ______?
Answer:  Lashkar-e-Jhangvi

General Knowledge

Q. The Capital of Russia is?
Answer: Moscow
Q. When is International Peace Day celebrated?
Answer: 21 September
Q. “Myanmar” is the new/old name of _____ ?
Answer: Burma
Q. What is the Longest River in the World?
Answer: Nile
Q. Which is the largest animal in the world?
Answer: Blue whale
Q. Which is the longest wall in the World?
Answer: Wall of China
Q. Which is the largest and most practiced religion in the world?
Answer: Christianity
Q. What is the most spoken language in the world?
Answer: English
Q. Where is the world’s longest sea bridge?
Answer: China (Hong Kong–Zhuhai–Macau Bridge)
Q. On what date world population day is observed?
Answer: July 11
Q. Which company on 25th January 2024, reached a market value of a record $3 trillion?
Answer: Microsoft
Q. The second highest peak K-2 in the world is located in?
Answer: Karakoram Range
Q. Which one of the following is a landlocked country?
Answer: Mongolia
Q. Instrument used for measuring the thickness/purity of milk is called what?
Answer: Lactometer
Q. The Largest Continent (by Area and Population) of the World is __________?
Answer: Asia
Q. NATO is a/an ________ alliance.
Answer: Military
Q. Mohenjo-Daro is located in which district of Sindh?
Answer: Larkana District
Q. What is the worlds largest living mammal?
Answer: Blue Whale
Q. Suez Canal is between ______?
Answer: Mediterranean Sea and Red Sea
Q. NASA’s Blue Ghost Mission-2 is planned for which year?
Answer: 2026

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