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- Question
What Henry Bessemer invented?
Options- A. Aluminum
- B. Electroplating
- C. Steel Converter
- D. Steel rolling mill
- Correct Answer
- Steel Converter
- 1. What Frank Whittle invented?
Options- A. Radar
- B. Ethyl gasoline
- C. Sonar
- D. Jet propulsion Discuss
- 2. Roentgen discovered
Options- A. Electrocardiograph
- B. X?rays
- C. Anti polio vaccine
- D. Encephalograph Discuss
- 3. Who is often called the 'first African-American' inventor?
Options- A. Bessie Blount
- B. George Washington Carver
- C. Benjamin Banneker
- D. Elijah McCoy Discuss
- 4. Air conditioner was discovered by
Options- A. Edison
- B. Wilson
- C. Carrier
- D. Roentgen Discuss
- 5. 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
- 6. Who Invented Contact Lens ?
Options- A. Joel Houghton
- B. Ruth Graves Wakefield
- C. Adolf Gaston Eugen Fick
- D. John Stith Pemberton Discuss
- 7. Who Invented Worldwide Standard Time Zones ?
Options- A. Charles Richard Drew
- B. Henry W. Seely
- C. Jesse Wilford Reno
- D. Sir Sandford Fleming Discuss
- 8. In which year was the first solid state integrated circuit demonstrated?
Options- A. 1970s
- B. 1960s
- C. 1950s
- D. 1980s Discuss
- 9. Who invented the BALLPOINT PEN?
Options- A. Write Brothers
- B. Waterman Brothers
- C. Biro Brothers
- D. Bicc Brothers Discuss
- 10. What drink was invented by Charles Leiper Grigg in 1929?
Options- A. 7-Up
- B. Yoo-Hoo
- C. Pepsi
- D. Hawaiian Punch Discuss
Inventions problems
Search Results
Correct Answer: Jet propulsion
Correct Answer: X?rays
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: Adolf Gaston Eugen Fick
Correct Answer: Sir Sandford Fleming
Correct Answer: 1950s
Correct Answer: Biro Brothers
Correct Answer: 7-Up
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