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