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- Question
Roentgen discovered
Options- A. Electrocardiograph
- B. X?rays
- C. Anti polio vaccine
- D. Encephalograph
- Correct Answer
- X?rays
- 1. Who is often called the 'first African-American' inventor?
Options- A. Bessie Blount
- B. George Washington Carver
- C. Benjamin Banneker
- D. Elijah McCoy Discuss
- 2. Air conditioner was discovered by
Options- A. Edison
- B. Wilson
- C. Carrier
- D. Roentgen Discuss
- 3. Which insurance salesman invented the fountain pen in 1884?
Options- A. Lewis Edson Waterman
- B. Sir William Grove
- C. Charles Kettering
- D. George Fountain Discuss
- 4. Analytical Engine was invented by
Options- A. Dewar
- B. Charles Babbage
- C. Daimler
- D. None of these Discuss
- 5. Who discovered Insulin
Options- A. William Harvey
- B. Louis Pasteur
- C. F.G.Banting
- D. Alexander Fleming Discuss
- 6. What Frank Whittle invented?
Options- A. Radar
- B. Ethyl gasoline
- C. Sonar
- D. Jet propulsion Discuss
- 7. What Henry Bessemer invented?
Options- A. Aluminum
- B. Electroplating
- C. Steel Converter
- D. Steel rolling mill Discuss
- 8. Who Invented Contact Lens ?
Options- A. Joel Houghton
- B. Ruth Graves Wakefield
- C. Adolf Gaston Eugen Fick
- D. John Stith Pemberton Discuss
- 9. Who Invented Worldwide Standard Time Zones ?
Options- A. Charles Richard Drew
- B. Henry W. Seely
- C. Jesse Wilford Reno
- D. Sir Sandford Fleming Discuss
- 10. In which year was the first solid state integrated circuit demonstrated?
Options- A. 1970s
- B. 1960s
- C. 1950s
- D. 1980s Discuss
Inventions problems
Search Results
Correct Answer: Benjamin Banneker
Correct Answer: Carrier
Correct Answer: Lewis Edson Waterman
Explanation:
Lewis Edson Waterman patented the first practical fountain pen in 1884.
Correct Answer: Charles Babbage
Correct Answer: Alexander Fleming
Correct Answer: Jet propulsion
Correct Answer: Steel Converter
Correct Answer: Adolf Gaston Eugen Fick
Correct Answer: Sir Sandford Fleming
Correct Answer: 1950s
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