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Baskar
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PostSubject: Science Quiz   Mon Jan 21, 2008 1:29 pm

Question 1: Some lasers are referred to as being cw. What does cw mean?

1) Circular wave
2) Constant white
3) Continuous wave
4) Clear white


Science Quiz, Technology Quiz
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Question 2: What is the process responsible for producing photons in a diode laser?

1) Fermi level shift
2) Majority carrier injection
3) Carrier freeze out
4) Electron-hole recombination


Science Quiz, Technology Quiz
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Question 3: What are three types of lasers?

1) Gas, metal vapor, rock
2) Pointer, diode, CD
3) Diode, inverted, pointer
4) Gas, solid state, diode


Science Quiz, Technology Quiz
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Question 4: What was the active medium used in the first working laser ever constructed?

1) A diamond block
2) Helium-neon gas
3) A ruby rod
4) Carbon dioxide gas


Science Quiz, Technology Quiz
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Question 5: After the first photons of light are produced, which process is responsible for amplification of the light?

1) Blackbody radiation
2) Stimulated emission
3) Plancks radiation
4) Einstein oscillation


Science Quiz, Technology Quiz
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Question 6: Once the active medium is excited, the first photons of light are produced by which physical process?

1) Blackbody radiation
2) Spontaneous emission
3) Synchrotron radiation
4) Plancks oscillation


Science Quiz, Technology Quiz
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Question 7: The first step to getting output from a laser is to excite an active medium. What is this process called?

1) Pumping
2) Exciting
3) Priming
4) Raising


Science Quiz, Technology Quiz
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Question 8: Breaking of a larger hydrocarbon molecule into a smaller one by heating in the presence of a catalyst is called ___.

1) Cracking
2) Orthofugation
3) Centrifugation
4) Thermogenation


Science Quiz
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Question 9: A primary fuel is that which is used in the same form as it occurs in nature. Which of the following is not a primary fuel?

1) Kerosene
2) Wood
3) Coal
4) Natural Gas


Science Quiz
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Question 10: Where was the first oil well struck in the world?

1) Kuwait
2) USA
3) Saudi Arabia
4) Australia


Science Quiz
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Question 11: What is the process used to separate the different components of oil?

1) Deadly Distillation
2) Simple Distillation
3) Fractional Distillation
4) Destructive Distillation


Science Quiz
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Question 12: What is the main constituent of coal gas?

1) Oxygen
2) Water
3) Nitrogen
4) Methane


Science Quiz
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Question 13: Which variety of coal contains the highest percentage of carbon?

1) Anthracite
2) Peat
3) Bituminous
4) Lignite


Science Quiz
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Question 14: Coal is formed due to the process of...?

1) Evaporation
2) Centrifugation
3) Conjugation
4) Carbonization


Science Quiz
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Question 15: Which of these has the highest calorific value?

1) Rubber
2) Wood
3) Coal
4) Hydrogen


Science Quiz
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Question 16: What is the main component of biogas and natural gas?

1) Ethane
2) Methane
3) Propane
4) Butane


Science Quiz
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Question 17: Heating fuels in the absence of air is called 'Destructive Distillation', as it 'destroys' it to form simpler substances. What do we get when we do the same to wood?

1) Tar
2) Acetic Acid
3) Charcoal
4) All of these


Science Quiz
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Question 18: If you wanted to lighten your hair at home, what is the active ingredient in the dye preparation that will lighten your hair?

1) Hydrogen peroxide
2) Acetic acid
3) Sodium hydroxide
4) Phenol


Science Quiz
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Question 19: "Antifreeze" is used in car radiators to stop the liquid that cools the engine from, well, freezing when it gets cold outside. Water is one component of antifreeze; what is the other main component?

1) Ethylene glycol
2) Acetone
3) Sodium chloride
4) Benzene


Science Quiz
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Question 20: Aspirin can be found in many household medicine cabinets. But what is it chemically?

1) Paracetamol
2) Acetylsalicylic acid
3) Acetaminophen
4) Ibuprofen
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Thee$ha
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PostSubject: Re: Science Quiz   Tue Jan 22, 2008 6:31 am

Answers:

Spoiler:
 

_________________
When one door closes, another opens; but we often look so long and so regretfully upon the closed door that we do not see the one which has opened for us!!!
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Baskar
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PostSubject: Re: Science Quiz   Tue Jan 22, 2008 6:50 pm

Good Job theesha n i know ur da only one goin to do da science quiz Good Job

lol! do u want more science quiz lol!
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Thee$ha
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PostSubject: Re: Science Quiz   Wed Jan 23, 2008 3:28 am

haha hw do u knw tht 4 sure Basker? lol!

yh add more quizzes!

_________________
When one door closes, another opens; but we often look so long and so regretfully upon the closed door that we do not see the one which has opened for us!!!
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Baskar
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Number of posts : 1306
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PostSubject: Re: Science Quiz   Wed Jan 23, 2008 10:12 am

lol! theesha i got quiz in da database lol!
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