9. | What James Watt invented? | |||||||
Answer: Option D Explanation: Invented in 1765. |
11. | Who invented Jet Engine? | |||||||
Answer: Option A Explanation: Dr. Hans von Ohain and Sir Frank Whittle are recognized as the co-inventors of the jet engine. Each was working separately and knew nothing of the others work. Although Whittle started first, von Ohain was first to design and develop a turbojet engine to power an aircraft. Of the many honors received by both, the most significant honor was probably “The Charles Draper Prize” in 1992 which was given to both Hans von Ohain and Sir Frank Whittle for their efforts and contributions to aviation and mankind. “The Charles Draper Prize” is recognized as the equivalent to the Nobel Prize in technology. |
12. | What invention caused many deaths while testing it? | |||||||
Answer: Option D Explanation: Many people who tried to test the first parachutes died by jumping from high places. One attempt was a parachute hat, but the inventor broke his neck while testing it. The first successful parachute was tested from a hot air balloon in 1797, in France, by Jacques Garnerin. |
13. | Who invented Gunpowder? | |||||||
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14. | Until Victorian times, chocolate was thought of as a drink. When did the first chocolate bar appear? | |||||||
Answer: Option D Explanation: No one knows for sure when the first chocolate bar appeared or even who made it, but an important event occurred in 1828. The Van Houten press was invented, which extracted cocoa butter from the bean – the same press that brought the Cadbury Brothers success with Cocoa Essence. |
15. | In which decade was the telephone invented? | |||||||
Answer: Option C Explanation: Alexander Graham Bell’s notebook entry of 10 March 1876 describes his successful experiment with the telephone. Speaking through the instrument to his assistant, Thomas A. Watson, in the next room, Bell utters these famous first words, “Mr. Watson — come here — I want to see you”. |
16. | Who perfected GENETIC ENGINEERING? | |||||||
Answer: Option A Explanation: Genetic Engineering, the technique of DNA cloning was perfected by Stanley Cohen and Herbert Boyer in 1973. |