Discussion
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- Question
Typewriter was invented by
Options- A. Shockley
- B. Sholes
- C. Howe
- D. None of these
- Correct Answer
- Sholes
- 1. Fax machine was invented by
Options- A. Daimler
- B. Dewar
- C. Bain
- D. None of these Discuss
- 2. Stethoscope was invented by
Options- A. Bessemer
- B. Rane Laennec
- C. Henry Becquarrel
- D. none of these Discuss
- 3. When were bar code scanners invented?
Options- A. 1940s
- B. 1950s
- C. 1960s
- D. 1970s Discuss
- 4. Who invented logarithms?
Options- A. Mandeleef
- B. Shockley
- C. Amundson
- D. John Napier Discuss
- 5. When was the voting machine invented?
Options- A. 1980
- B. 1892
- C. 1989
- D. 1920 Discuss
- 6. What George Westinghouse invented?
Options- A. Electric razor
- B. Light bulb
- C. Railway air brakes
- D. Refrigerator Discuss
- 7. Which scientist discovered the radioactive element radium?
Options- A. Isaac Newton
- B. Marie Curie
- C. Benjamin Franklin
- D. None of these Discuss
- 8. Who Invented Piano ?
Options- A. Bartolomeo Cristofori di Francesco
- B. Ruth Graves Wakefield
- C. Adolf Gaston Eugen Fick
- D. Jacques Cousteau Discuss
- 9. Who Invented Microwave Oven ?
Options- A. Lewis Edson Waterman
- B. Levi Strauss
- C. Percy LeBaron Spencer
- D. Sir Sandford Fleming Discuss
- 10. Who is the inventor of railway engine?
Options- A. George Stephenson
- B. W.H.F Talbot
- C. Richard Trevithik
- D. Eli Whitney Discuss
Inventions problems
Search Results
Correct Answer: Bain
Correct Answer: Rane Laennec
Correct Answer: 1970s
Correct Answer: John Napier
Correct Answer: 1892
Correct Answer: Railway air brakes
Correct Answer: Marie Curie
Correct Answer: Bartolomeo Cristofori di Francesco
Correct Answer: Percy LeBaron Spencer
Correct Answer: Richard Trevithik
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