Science & Technology Quiz

15 Questions  I  By Coolpuneet007
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 Science & Technology Quiz
This quiz section is generally for students. . . For those students who are from science streamso lets see how much you know

  
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Questions and Answers

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  • 1. 
    What is the process responsible for producing photons in a diode laser?
    • A. 

      Fermi level shift

    • B. 

      Majority carrier injection

    • C. 

      Carrier freeze out

    • D. 

      Electron-hole recombination

    • E. 

      None of the above


  • 2. 
    What was the active medium used in the first working laser ever constructed?
    • A. 

      A diamond block

    • B. 

      Helium-neon gas

    • C. 

      A ruby rod

    • D. 

      Carbon dioxide gas

    • E. 

      Nitrogen gas


  • 3. 
    After the first photons of light are produced, which process is responsible for amplification of the light ?
    • A. 

      Blackbody radiation

    • B. 

      Stimulated emission

    • C. 

      Einstein oscillation

    • D. 

      Planck’s radiation

    • E. 

      None of the above


  • 4. 
    Breaking of a larger hydrocarbon molecule into a smaller one by heating in the presence of a catalyst is called ___.
    • A. 

      Cracking

    • B. 

      Orthofugation

    • C. 

      Centrifugation

    • D. 

      Thermogenation

    • E. 

      Thermocracking


  • 5. 
    Where was the first oil well struck in the world?
    • A. 

      Kuwait

    • B. 

      Australia

    • C. 

      Saudi Arabia

    • D. 

      India

    • E. 

      USA


  • 6. 
    Which of these has the highest calorific value?
    • A. 

      Rubber

    • B. 

      Hydrogen

    • C. 

      Coal

    • D. 

      Plastic

    • E. 

      Wood


  • 7. 
    What is dry ice?
    • A. 

      Liquid nitrogen

    • B. 

      Water ice

    • C. 

      Solid carbon dioxide

    • D. 

      Frozen ethanol

    • E. 

      None of the above


  • 8. 
    What was the first element to be produced artificially ?
    • A. 

      Plutonium

    • B. 

      Neptunium

    • C. 

      Francium

    • D. 

      Technetium

    • E. 

      None of these


  • 9. 
    In what country must you turn over any meteor finds?
    • A. 

      Scotland

    • B. 

      Egypt

    • C. 

      South Africa

    • D. 

      Russia

    • E. 

      USA


  • 10. 
    Exhaled air has what % of its oxygen left?
    • A. 

      77%

    • B. 

      24%

    • C. 

      62%

    • D. 

      48%

    • E. 

      55%


  • 11. 
    Much of our body heat escapes through the head. What percent is this?
    • A. 

      50%

    • B. 

      60%

    • C. 

      70%

    • D. 

      80%

    • E. 

      90%


  • 12. 
    The Law of Octaves was given by...?
    • A. 

      Mendeleev

    • B. 

      John Newlands

    • C. 

      Bohr

    • D. 

      Dobereiner

    • E. 

      None of the above


  • 13. 
     Lux is the unit of...?
    • A. 

      Luminous Intensity

    • B. 

      Magnetic flux

    • C. 

      Focus

    • D. 

      Luminous Flux

    • E. 

      Illumination


  • 14. 
    What was the coldest temperature ever recorded on Earth (at Vostok, Antarctica)?
    • A. 

      -197 F

    • B. 

      -136 F

    • C. 

      -103 F

    • D. 

      -129 F

    • E. 

      -53 F


  • 15. 
    Pure water freezes at what temperature?1) 2) 3) 4) 
    • A. 

      19 F

    • B. 

      0 F

    • C. 

      32 F

    • D. 

      47 F

    • E. 

      23 F


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