(A) Orville & Wilbur Wright in 1903
(B)Ralph H. Baer
(C) Percy Spencer
(D) Evangelista Torricelli
Q.12. Who invented Air Conditioning?
(A) Willis Carrier in 1902
(B) Federico Faggin
(C) Zacharias Janssen
(D) Percy Spencer
Q.13 Who invented Barometer?
(A) Evangelista Torricelli of Italy in 1644
(B) Steven Sasson
(C) Martin Cooper
(D) Dave Hyatt
Q.14 Who invented Ball-Point Pen?
(A) John J. Loud of U.S.A. in 1888
(B) Federico Faggin
(C) Zacharias Janssen
(D) Percy Spencer
Q.15 Who invented DNA Structure?
(A) Crick (UK), Waston (US), Wilkins (UK) in 1951
(B) Federico Faggin
(C) Zacharias Janssen
(D) Percy Spencer
Q.16. Who invented Laser?
(A) Charles H. Townes
(B) Ralph H. Baer
(C) Percy Spencer
(D) Evangelista Torricelli
Q.17 Who invented Locomotive?
(A) George Stephenson was first to buit steam locomotives.
(B) Steven Sasson
(C) Martin Cooper
(D) Dave Hyatt
Q.18 Who invented Logarithms?
(A) John Napier (Scotland) invented Logarithm
(B) Federico Faggin
(C) Zacharias Janssen
(D) Percy Spencer
Q.19 Who invented Machine Gun?
(A) Helge Palmcrantz, Swedish inventor and industrialist
(B) Federico Faggin
(C) Zacharias Janssen
(D) Percy Spencer
Q.20 Who invented HIV?
(A) Dr Robert Gallo invented HIV test
(B) Federico Faggin
(C) Zacharias Janssen
(D) Percy Spencer
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