Q81. Who among the following scientists invented the Cotton Gin?
[A] Norman Borlaugh
[B] George Washington Carver
[C] Eli Whitney
[D] Sonny Perdue
Q82. Telegrahic code was introduced by
[A] Thomas Moore
[B] Lipman
[C] Cockrell
[D] Macmillan
Q83. The cause of Beri Beri was discovered by
[A] Macmillan
[B] Eijkman
[C] Cockrell
[D] Alexanderson
Q84. In which decade was the Internet first implemented?
[A] 1960s
[B] 1970s
[C] 1980s
[D] 1940s
Q85. Who invented ECG?
[A] Einthoven
[B] G. Bist
[C] Hans Berger
[D] None of the above
Q86. The credit of inventing the television goes to
[A] Charles Francis Jenkins
[B] Philo Farnsworth
[C] John Logie Baird
[D] None of the above
Q87. When was the voting machine invented?
[A] 1989
[B] 1980
[C] 1920
[D] 1892
Q88. Who among the following is credited with the discovery of neutrons?
[A] James P Joule
[B] E Rutherford
[C] JJ Thomson
[D] J Chadwick
Q89. The first hand glider was designed by
[A] The Wright brothers
[B] Leonardo DaVinci
[C] Galileo
[D] Francis Rogallo
Q90. Who invented FM radio?
[A] Galileo
[B] Edwin Howard Armstrong
[C] Graham Bell
[D] Thomas Alva Edison