Discussion
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- Question
Air conditioner was discovered by
Options- A. Edison
- B. Wilson
- C. Carrier
- D. Roentgen
- Correct Answer
- Carrier
- 1. 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
- 2. Analytical Engine was invented by
Options- A. Dewar
- B. Charles Babbage
- C. Daimler
- D. None of these Discuss
- 3. Who discovered Insulin
Options- A. William Harvey
- B. Louis Pasteur
- C. F.G.Banting
- D. Alexander Fleming Discuss
- 4. Who invented ECG?
Options- A. Hans Berger
- B. Einthoven
- C. G. Bist
- D. None of the above Discuss
- 5. What charge card, developed in 1950, was the first to be approved nationally in the US?
Options- A. Discover
- B. MasterCharge
- C. Visa
- D. Diner's Club Discuss
- 6. Who is often called the 'first African-American' inventor?
Options- A. Bessie Blount
- B. George Washington Carver
- C. Benjamin Banneker
- D. Elijah McCoy Discuss
- 7. Roentgen discovered
Options- A. Electrocardiograph
- B. X?rays
- C. Anti polio vaccine
- D. Encephalograph Discuss
- 8. What Frank Whittle invented?
Options- A. Radar
- B. Ethyl gasoline
- C. Sonar
- D. Jet propulsion Discuss
- 9. What Henry Bessemer invented?
Options- A. Aluminum
- B. Electroplating
- C. Steel Converter
- D. Steel rolling mill Discuss
- 10. Who Invented Contact Lens ?
Options- A. Joel Houghton
- B. Ruth Graves Wakefield
- C. Adolf Gaston Eugen Fick
- D. John Stith Pemberton Discuss
Inventions problems
Search Results
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: Einthoven
Correct Answer: Diner's Club
Explanation:
The card was established by Frank McNamara and Ralph Schneider.
Correct Answer: Benjamin Banneker
Correct Answer: X?rays
Correct Answer: Jet propulsion
Correct Answer: Steel Converter
Correct Answer: Adolf Gaston Eugen Fick
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