Science and Technology GK | Read to crack any Competitive Exams

1. Which country is known as the country of wind?

(A) Finland

(B) Norway

(C) Denmark

(D) Germany

Answer: Denmark

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2. Which device is used to convert solar energy into electrical energy?

(A) Solar Cell

(B) Glass Sheet Cover

(C) Solar Cooker

(D) None of the above

Answer: Solar Cell

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3. Where the largest solar furnace is located?

(A) Spain

(B) Germany

(C) France

(D) Italy

Answer: France

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4. Which element is not used to make springs?

(A) Cast Iron

(B) Copper

(C) Silver

(D) Iron

Answer: Cast Iron

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Answer Explanation:

The elements which shows large plastic range beyond elastic limit, are called Ductile materials.Copper, Silver,Iron , Aluminum are examples of Ductile material.Cast iron is an example of Brittle materials.

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5. What is the normal temperature of human body?

(A) 100.1°F

(B) 98.6°F

(C) 95.6°F

(D) 98.9°F

Answer: 98.6°F

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6. What is the unit of measurement of the optical power of a lens?

(A) Diopters

(B) Lumen

(C) Aeon

(D) Candela

Answer: Diopters

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Answer Explanation:

D = 1/f, where D is the power in diopters and f is the focal length in meters.

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7. Who designed Celsius Scale?

(A) Ernest Walton

(B) Anders Celsius

(C) Robert E. Marshak

(D) James Dewar

Answer: Anders Celsius

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8. What is the Excretory organ in cockroach?

(A) Green glands

(B) Malpighian tubules

(C) Nephridia

(D) Amoeba

Answer: Malpighian tubules

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Answer Explanation:

It is found at the junction of the midgut and hindgut.

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9. Study of flower and flowering plant is known as –

(A) Cytology

(B) Agronomy

(C) Anthology

(D) Cryobiology

Answer: Anthology

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10. Which protein does not found in plasma?

(A) Heparin

(B) Fibrinogen

(C) Albumins

(D) Globulins

Answer: Heparin

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11. How many times human heart valves open and close normally in a day?

(A) 150,000 times

(B) 100,000 times

(C) 8,000 times

(D) 6,000 times

Answer: 100,000 times

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12. Who invented blood circulatory system?

(A) The Wright Brothers

(B) Thomas Edison

(C) William Harvey

(D) Nikola Tesla

Answer: William Harvey

Answer Explanation:

Thomas Edison – Electric light bulb
The Wright Brothers – Aircraft
Nikola Tesla – AC electricity

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13. When a barometer is taken down in a coal mine , which of the following happens with the Mercury level in the tube?

(A) rises

(B) remains unaltered

(C) falls

(D) falls then rises

Answer: rises

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14. Gibberellins hormone can find in the –

(A) Apical dominance

(B) Seed germination

(C) Climacteric ripening of fruits

(D) None of the above

Answer: Seed germination

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15. Which metal is used in amalgam?

(A) Copper

(B) Mercury

(C) Aluminium

(D) Lead

Answer: Mercury

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16. Which among the following was first human-made plastic?

(A) Polyethene

(B) Nylon

(C) Celluloid

(D) Low Density Polyethylene

Answer: Celluloid

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17. Electric bulb filament is made of which element?

(A) Lead

(B) Aluminum

(C) Copper

(D) Tungsten

Answer: Tungsten

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18. Which of the following non-metal remains liquid at room temperature?

(A) Bromine

(B) Chlorine

(C) Phosphorous

(D) Helium

Answer: Bromine

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19. Who is known as the “founder of geometry” / “father of geometry”?

(A) Pythagoras

(B) Euclid

(C) Aristotle

(D) Kepler

Answer: Euclid

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20. Who wrote the famous book – Principia?

(A) Khushwant singh

(B) Karl Marx

(C) Issac Newton

(D) Lala Lajpat Rai

Answer: Issac Newton

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21. The study of the effects of radiation upon living organisms is known as –

(A) Cynology

(B) Autecology

(C) Bromatology

(D) Actinobiology

Answer: Actinobiology

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22. The dimension [MLT–2] corresponds to

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(A) force

(B) work done

(C) acceleration

(D) velocity

Answer: force

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Answer Explanation:

The dimensions of Force are M (mass), L (length) and T-2(time). It can also be expressed as [newton] = [kilogram] [metre] [second]-2

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23. Newton’s first law also known as-

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(A) Law of momentum

(B) Law of energy

(C) Law of inertia

(D) Law of moment

Answer: Law of inertia

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Answer Explanation:

It states that an object at rest will stay at rest and an object in motion will stay in motion with the same speed and direction unless acted upon by unbalanced force.

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24. Which one of the following conservation laws, does a rocket work?

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(A) angular momentum

(B) mass

(C) linear momentum

(D) energy

Answer: linear momentum

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Answer Explanation:

Rocket works on the principle of conservation of momentum. Rocket ejaculates gases in backward direction which creates momentum of the gases backwards and thus by conservation of momentum, the rocket gets momentum in the forward direction making it move forward.Thus the rocket works on the principle of conservation of linear momentum.

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25. Angle of friction and angle of repose are –

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(A) Proportional to each other

(B) Equal to each other

(C) Not equal to each other

(D) None of the above

Answer: Equal to each other

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26. We slip on a muddy road due to –

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(A) Excess of friction

(B) Gravitational forces

(C) Lack of friction

(D) Relative velocity

Answer: Lack of friction

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27. The quantity ‘weight’ is measured by –

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(A) Common balance

(B) Beam balance

(C) Balance wheel

(D) Spring balance

Answer: Spring balance

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28. Rocket works on the principal of –

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(A) Newton's first law

(B) Newton's second law

(C) Newton's third law

(D) None of the above

Answer: Newton's third law

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29. Ball bearings are used in bicycles,cars, etc because –

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(A) The effective area of contact between the wheel and axle is reduced

(B) The effective area of contact between the wheel and axle is increased

(C) The actual area of contact between the wheel and axle is increased

(D) None of the above

Answer: The effective area of contact between the wheel and axle is reduced

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30. If an object undergoes a uniform circular motion,then its –

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(A) velocity remains uniform

(B) acceleration remains uniform

(C) speed changes

(D) velocity changes

Answer: velocity changes

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31. The working principle of a washing machine is

(A) Dialysis

(B) Diffusion

(C) Centrifugation

(D) Reverse osmosis

Answer: Centrifugation

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32. An athlete runs before long jump to get the advantage of –

(A) Frictional force

(B) Intertia of motion

(C) Moment of a force

(D) Principle of moments

Answer: Intertia of motion

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33. Which hydropower project not developed under the China Pakistan Economic Corridor (CPEC)?

(A) Karot Project

(B) Uri Power Project

(C) Mahl Project

(D) Kohala Project

Answer: Uri Power Project

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Answer Explanation:

Uri project developed by State-owned National Hydro Power Corporation (NHPC).Alstom was awarded the Uri 2 contract by NHPC in 2007 and provided the plant’s turbines, generators and auxiliaries.

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34. What is Abell 370, whose picture was recently shared by the NASA?

(A) Meteor

(B) Exoplanet

(C) Black Hole

(D) Galaxy Cluster

Answer: Galaxy Cluster

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Answer Explanation:

NASA has recently posted a picture of Abell 370, a massive cluster of galaxies, captured through its Hubble Space Telescope. As per the statement of NASA, the massive gravity of the cluster makes the light to bend as it passes through. This phenomenon distorts the view of the galaxies behind Abell 370, which is located at 4.9 billion light-years away from the Earth.

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Read to crack any Competitive Exams

Science and Technology GK Important for UPSC, SSC, PSC, CHSL, CDS, WBCS, CGL, IAS, NDA, Railways, Banks, etc.

1. Which country is known as the country of wind?

2. Which device is used to convert solar energy into electrical energy?

3. Where the largest solar furnace is located?

4. Which element is not used to make springs?

5. What is the normal temperature of human body?

6. What is the unit of measurement of the optical power of a lens?

7. Who designed Celsius Scale?

8. What is the Excretory organ in cockroach?

9. Study of flower and flowering plant is known as –

10. Which protein does not found in plasma?

11. How many times human heart valves open and close normally in a day?

12. Who invented blood circulatory system?

13. When a barometer is taken down in a coal mine , which of the following happens with the Mercury level in the tube?

14. Gibberellins hormone can find in the –

15. Which metal is used in amalgam?

16. Which among the following was first human-made plastic?

17. Electric bulb filament is made of which element?

18. Which of the following non-metal remains liquid at room temperature?

19. Who is known as the “founder of geometry” / “father of geometry”?

20. Who wrote the famous book – Principia?

21. The study of the effects of radiation upon living organisms is known as –

22. The dimension [MLT–2] corresponds to

23. Newton’s first law also known as-

24. Which one of the following conservation laws, does a rocket work?

25. Angle of friction and angle of repose are –

26. We slip on a muddy road due to –

27. The quantity ‘weight’ is measured by –

28. Rocket works on the principal of –

29. Ball bearings are used in bicycles,cars, etc because –

30. If an object undergoes a uniform circular motion,then its –

31. The working principle of a washing machine is

32. An athlete runs before long jump to get the advantage of –

33. Which hydropower project not developed under the China Pakistan Economic Corridor (CPEC)?

34. What is Abell 370, whose picture was recently shared by the NASA?

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