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Q:

Who Invented Piano ?

A) Bartolomeo Cristofori di Francesco B) Ruth Graves Wakefield
C) Adolf Gaston Eugen Fick D) Jacques Cousteau

Answer:   A) Bartolomeo Cristofori di Francesco



Explanation:
Subject: Inventions
Q:

App to locate board exam centre for students launched by ?

A) CBSE B) IIT
C) JNU D) NCERT
 
Answer & Explanation Answer: A) CBSE

Explanation:
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Q:

The first effective vaccine against polio was prepared by ?

A) Robert Edwards B) James Simpson
C) H Gibbon D) Jonas E Salk
 
Answer & Explanation Answer: D) Jonas E Salk

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7 538
Q:

Who is known as inventor of World Wide Standard Time ?

A) Sandford Fleming B) Fredrich
C) Williamson D) James Broot
 
Answer & Explanation Answer: A) Sandford Fleming

Explanation:

Sir Sandford Fleming, (January 7, 1827 – July 22, 1915) was a Scottish Canadian engineer and inventor. Born and raised in Scotland, he emigrated to colonial Canada at the age of 18. He proposed worldwide standard time zones, designed Canada's first postage stamp.

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6 492
Q:

Who invented waterproof fabrics ?

A) James Dewar B) Charles Goodyear
C) Mary Moore D) Charles Macintosh
 
Answer & Explanation Answer: D) Charles Macintosh

Explanation:

Charles Macintosh (29 December 1766 – 25 July 1843) was a Scottish chemist and inventor of waterproof fabrics.He devoted all his spare time to science, particularly chemistry, and before he was twenty resigned his clerkship to take up the manufacture of chemicals. In this he was highly successful, inventing various new processes. His experiments with one of the by-products of tar, naphtha, led to his invention of waterproof fabrics.

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11 675
Q:

Which object, initially called the 'Whirlwind', was invented by Ives McGaffey in 1869 ?

A) Washing machine B) Electric mixer
C) Vacuum cleaner D) Blender
 
Answer & Explanation Answer: C) Vacuum cleaner

Explanation:
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