GK Questions on World Invention for Competitive Exam

List of Inventions: 2018

Q.31 Who invented Electron?

(A) Thomson. J of Britain in 1897

(B) Ralph H. Baer
(C) Percy Spencer
(D) Evangelista Torricelli

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Q.32 Who invented Floppy disk?

(A) IBM in 1970

(B) Euclid
(C) Marie Curie
(D) J.L. Baird

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Q.33 Who invented Neutron?

(A) JAMES CHADWICK in 1932

(B) Steven Sasson
(C) Martin Cooper
(D) Dave Hyatt

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Q.34 Who invented Refrigerator?

(A) Oliver Evans in 1805

(B) Federico Faggin
(C) Zacharias Janssen
(D) Percy Spencer

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Q.35 Who invented Safety Pin?

(A) Walter Hunt of U.S.A. in 1849

(B) Federico Faggin
(C) Zacharias Janssen
(D) Percy Spencer

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Q.36 Who invented Safety razor?

(A) King Camp Gillette of U.S.A. in 1903

(B) Federico Faggin
(C) Zacharias Janssen
(D) Percy Spencer

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Q.37 Who invented Stainless Steel?

(A) Harry Brearley of Britain in 1913.

(B) Steven Sasson
(C) Martin Cooper
(D) Dave Hyatt

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Q.38 Who invented Steam Engine?

(A) Thomas Savery of Britain in 1698

(B) Ralph H. Baer
(C) Percy Spencer
(D) Evangelista Torricelli

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Q.39 Who invented Steam Engine (Piston)

(A) Thomas Newcomen of Britain in 1712

(B) Euclid
(C) Marie Curie
(D) J.L. Baird

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Q.40 Who invented Steam Engine (Condenser)

(A) James Watt of Britain in 1765

(B) Ralph H. Baer
(C) Percy Spencer
(D) Evangelista Torricelli

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