PPSC Online MCQS Test Preparation

GK Science

PPSC Online MCQS Test Preparation General Knowledge Questions related to Science with answer key. GK about science solved practice and mock test free.

Which of the following is the most elastic?

What is the orbital period of the planet Mercury around the sun?

Which constellation is considered the most splendid and magnificent in the sky?

What do “black holes” refer to?

What is eugenics the study of?

What is the position of the Earth in its orbit when it is at its greatest distance from the sun, causing northern summer?

Diamond is composed of a single element. Which element is it?

Which layer(s) make radio transmission possible?

Why is there no total eclipse of the sun?

How are television signals converted into light signals?

Where do most asteroids lie?

How many spark plugs are needed in a diesel engine?

If the half-life of a radioactive element is 8 days, how long does it take to reduce from 10 mg to 5 mg?

What does the term “Blue Shift” indicate?

What is a kilowatt-hour a unit of?

What fuel is used in a Fast Breeder Reactor?

What causes the monsoon?

Which atmospheric layer helps in radio communication?

What is the purpose of a moderator in a nuclear reactor?

What are sedimentary rocks known for?


Answer Key:

  1. Rubber
  2. 88 days
  3. Orion
  4. Collapsing objects of high density
  5.  Altering human beings by changing their genetic components
  6.  Aphelion
  7. Carbon
  8. Ionosphere
  9. Size of the Earth in relation to that of the Moon
  10. Photo diode
  11. In the asteroid belt between the orbits of Mars and Jupiter
  12. 0
  13. 8 days
  14. Doppler effect in which an object appears bluer when it is moving towards the observer or the observer is moving towards the object.
  15. Energy
  16. Uranium Plutonium carbide
  17. Seasonal reversal of winds
  18. Ionosphere
  19. Slow down the speed of the neutrons
  20. Porous

Read also: Basic Science Questions answers


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