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General Knowledge on Inventions | GK Test on Inventions Page 17
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Inventions

General Knowledge on Inventions

(Click on suggested Options to select the answer | Color Red means : Wrong & Green Means: Correct)

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161. Which year was discovered in experiment Nuclear fission?
162. Who was first practical fluorescent lamp was invented in 1941?
163. Which company optical disc storage 'DVD' was invented and developed?
164. In which century porcelain was manufactured in northern China?
165. Which year was invented Railroad locomotive ?
166. In which year was inverted microscope by J. Lawrence Smith?
167. In which year housewife, Nancy Johnson of New England, invented hand-cranked ice cream churn?
168. In which year World Wide Web was publicly introduced for first time?
169. Who was built first freely programmable computer in world? 
170.  Which is used to measure alkalinity or acidity of a liquid was invented electronic instrument?

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