Q.21)-Who invented the Spinning Jenny?
  • Thornton Hargreaves
  • Peter Hargreaves
  • James Hargreaves
  • Simon Hargreaves
Q.22)-Which insurance salesman invented the fountain pen in 1884?
  • Lewis Edson Waterman
  • Sir William Grove
  • Charles Kettering
  • George Fountain
Q.23)-When was the first elevator built?
  • 1743
  • 1739
  • 1760
  • 1785
Q.24)-What charge card, developed in 1950, was the first to be accepted nationally in the US?
  • Visa
  • Discover
  • MasterCharge
  • Diner's Club
Q.25)-Which of the following was first patented by an Australian in 1889?
  • Electric Shaver
  • Electric Drill
  • Electric Fence
  • Electric Heater
Q.26)-What George Westinghouse invented?
  • Light bulb
  • Electric razor
  • Refrigerator
  • Railway air brakes
Q.27)-What Thomas Davenport invented?
  • Screw propellor
  • Electric streetcar
  • Chesterfield
  • Sleeping (railway) car
Q.28)-Where was the yo-yo invented?
  • France
  • United States
  • Philippines
  • England
Q.29)-The first hand glider was designed by...?
  • Leonardo DaVinci
  • The Wright brothers
  • Francis Rogallo
  • Galileo
Q.30)-When were blue jeans invented?
  • 1900s
  • 1860s
  • 1870s
  • 1850s