Exercise :: Inventions - Section 1
- Inventions - Section 1
| 49. | In which decade was the telegraph invented? |
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Answer: Option B Explanation: On May 24, 1844, Samuel Morse send his famous message, "What hath God wrought?"
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| 50. | What inspired reflecting road lights to be invented? |
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Answer: Option B Explanation: In 1933, Englishman Percy Shaw was driving home when he saw a cat's eyes reflecting. He had been headed straight towards a fence with the cat on it, but on the other side was a drop of hundreds of feet.
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| 51. | When were blue jeans invented? |
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Answer: Option D Explanation: The first blue jeans were invented by tailor Levi Strauss, who invented tougher working pants for the miners of the California Gold Rush.
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| 52. | Who invented Electric Generator? |
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| 53. | What device for new parents did Ann Moore invent in 1969? |
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Answer: Option D Explanation: Ann got the idea for the Snugli infant carrier from the traditional African baby carriers she observed while a volunteer for the Peace Corps in Africa.
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| 54. | In which decade was the transistor invented? |
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Answer: Option A Explanation: On December 23, 1947, William Shockley, Walter Brattain and John Bardeen, of Bell Labs, announced their discovery of the point-contact germanium transistor to management.
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| 55. | What Igor Sikorsky invented? |
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Answer: Option C Explanation: Invented in 1939.
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| 56. | What Henry Bessemer invented? |
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Answer: Option C Explanation: Invented in 1856.
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