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
Ans . A
Q.32 Who invented Floppy disk?
(A) IBM in 1970
(B) Euclid
(C) Marie Curie
(D) J.L. Baird
Ans . A
Q.33 Who invented Neutron?
(A) JAMES CHADWICK in 1932
(B) Steven Sasson
(C) Martin Cooper
(D) Dave Hyatt
Ans . A
Q.34 Who invented Refrigerator?
(A) Oliver Evans in 1805
(B) Federico Faggin
(C) Zacharias Janssen
(D) Percy Spencer
Ans . A
Q.35 Who invented Safety Pin?
(A) Walter Hunt of U.S.A. in 1849
(B) Federico Faggin
(C) Zacharias Janssen
(D) Percy Spencer
Ans . A
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
Ans . A
Q.37 Who invented Stainless Steel?
(A) Harry Brearley of Britain in 1913.
(B) Steven Sasson
(C) Martin Cooper
(D) Dave Hyatt
Ans . A
Q.38 Who invented Steam Engine?
(A) Thomas Savery of Britain in 1698
(B) Ralph H. Baer
(C) Percy Spencer
(D) Evangelista Torricelli
Ans . A
Q.39 Who invented Steam Engine (Piston)
(A) Thomas Newcomen of Britain in 1712
(B) Euclid
(C) Marie Curie
(D) J.L. Baird
Ans . A
Q.40 Who invented Steam Engine (Condenser)
(A) James Watt of Britain in 1765
(B) Ralph H. Baer
(C) Percy Spencer
(D) Evangelista Torricelli
Ans . A
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Rajesh Bhatia
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