General Knowledge - Inventions

Exercise :: Inventions - Section 1

  • Inventions - Section 1
49. 

In which decade was the telegraph invented?

A. 1810s
B. 1840s
C. 1870s
D. 1890s

Answer: Option B

Explanation:

On May 24, 1844, Samuel Morse send his famous message, "What hath God wrought?"

50. 

What inspired reflecting road lights to be invented?

A. Car door reflecting mirrors
B. The light a cat's eyes gave off on a fence
C. Sun light on steel posts on road sides
D. The sun light on the windshield

Answer: Option B

Explanation:

In 1933, Englishman Percy Shaw was driving home when he saw a cat's eyes reflecting. He had been headed straight towards a fence with the cat on it, but on the other side was a drop of hundreds of feet.

51. 

When were blue jeans invented?

A. 1900s
B. 1860s
C. 1870s
D. 1850s

Answer: Option D

Explanation:

The first blue jeans were invented by tailor Levi Strauss, who invented tougher working pants for the miners of the California Gold Rush.

52. 

Who invented Electric Generator?

A. Sir Alexander Graham Bell
B. Michael Faraday
C. Alfred B. Nobel
D. Thomas Alva Edison

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

53. 

What device for new parents did Ann Moore invent in 1969?

A. Bottle warmer
B. Baby monitor
C. Disposable diaper
D. Infant carrier

Answer: Option D

Explanation:

Ann got the idea for the Snugli infant carrier from the traditional African baby carriers she observed while a volunteer for the Peace Corps in Africa.

54. 

In which decade was the transistor invented?

A. 1940s
B. 1950s
C. 1960s
D. 1980s

Answer: Option A

Explanation:

On December 23, 1947, William Shockley, Walter Brattain and John Bardeen, of Bell Labs, announced their discovery of the point-contact germanium transistor to management.

55. 

What Igor Sikorsky invented?

A. Hydroplane
B. Jet engine airplane
C. Helicopter
D. Glider

Answer: Option C

Explanation:

Invented in 1939.

56. 

What Henry Bessemer invented?

A. Aluminum
B. Electroplating
C. Steel Converter
D. Steel rolling mill

Answer: Option C

Explanation:

Invented in 1856.