Inventions problems
- 1. D.D.T. was invented by
Options- A. Paul Muller
- B. John Dalton
- C. Rudolf
- D. None of these Also asked in: AIEEE, Bank Exams, Analyst, Bank Clerk, Bank PO
Correct Answer: Paul Muller
Explanation:
Swiss chemist Paul Hermann Muller discovered DDT (dichloro-diphenyl-trichloroethane) noted its effectiveness as a pesticide during World War II to control malaria and typhus among civilians and troops, a discovery that earned him a Nobel Prize in 1948.
It was first synthesized in the year 1874.
- 2. This statesman,politican,scholar,inventor,and one of early presidents of USA invented the swivel chair,the spherical sundial,the moldboard plow,and the cipher wheel.
Options- A. George Washington
- B. Alexander Hamilton
- C. John Adams
- D. Thomas Jefferson Discuss
Correct Answer: Thomas Jefferson
Explanation:
Thomas Jefferson (April 13, 1743 ? July 4, 1826) was the third President of the United States (1801-1809) and the principal author of the Declaration of Independence (1776).
- 3. Revolver discovered by
Options- A. Colt
- B. Mercafter
- C. Bushwell
- D. Daimler Discuss
Correct Answer: Colt
- 4. In the 1700s,who would pay the postage fee for letters before the stamp was invented?
Options- A. The sender
- B. There was no fee
- C. The receiver of the letter
- D. The post office Discuss
Correct Answer: The receiver of the letter
Explanation:
Later in 1840, Rowland Hill invented the stamp, which was paid for by the sender, not the receiver.
- 5. The most important feature of the Indian Parliament is that:
Options- A. it is the Union Legislature in India
- B. it also comprises of the president
- C. it is bicameral in nature
- D. the upper House of the Parliament is never dissolved Discuss
Correct Answer: it also comprises of the president
- 6. Cinematography was invented by
Options- A. Graham Bell
- B. Edison
- C. Zeiss
- D. Faraday Discuss
Correct Answer: Edison
- 7. Who invented Radar?
Options- A. Henrey Backquerel
- B. Max Planck
- C. Robert Watson Watt
- D. Humphrey Davy Also asked in: CAT, Bank Exams, AIEEE, Bank PO, Bank Clerk, Analyst
Correct Answer: Robert Watson Watt
- 8. In which decade was the Internet first implemented?
Options- A. 1940s
- B. 1960s
- C. 1970s
- D. 1980s Discuss
Correct Answer: 1960s
- 9. What J. B. Dunlop invented?
Options- A. Pneumatic rubber tire
- B. Automobile wheel rim
- C. Rubber boot
- D. Model airplanes Discuss
Correct Answer: Pneumatic rubber tire
- 10. App to locate board exam centre for students launched by ?
Options- A. CBSE
- B. IIT
- C. JNU
- D. NCERT Also asked in: Bank Exams, Bank Clerk, Bank PO
Correct Answer: CBSE
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