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  • Question
  • What Elmer A. Sperry invented?


  • Options
  • A. Hydroplane
  • B. Hydraulic turbine
  • C. Magnetic compass
  • D. Gyrocompass

  • Correct Answer
  • Gyrocompass 

    Explanation
    Invented in 1911.

  • Inventions problems


    Search Results


    • 1. Where was the yo-yo invented?

    • Options
    • A. France
    • B. United States
    • C. Philippines
    • D. England
    • Discuss
    • 2. For what is Charles Babbage (1792-1871) remembered?

    • Options
    • A. Computers
    • B. Telescopes
    • C. Radio-Telegraphy
    • D. Steam Boating
    • Discuss
    • 3. When was Monopoly created?

    • Options
    • A. 1940s
    • B. 1930s
    • C. 1920s
    • D. 1950s
    • Discuss
    • 4. Who invented Gunpowder?

    • Options
    • A. G. Ferdinand Von Zeppelin
    • B. Sir Frank Whittle
    • C. Roger Bacon
    • D. Leo H Baekeland
    • Discuss
    • 5. In which year was MIDI introduced?

    • Options
    • A. 1987
    • B. 1983
    • C. 1973
    • D. 1977
    • Discuss
    • 6. It travels over land and water. Who invented the HOVERCRAFT?

    • Options
    • A. S. Sperrow
    • B. O. Stricheg
    • C. T. Henman
    • D. C. Cockerell
    • Discuss
    • 7. When was the toothbrush invented?

    • Options
    • A. 1770
    • B. 1765
    • C. 1790
    • D. 1742
    • Discuss
    • 8. What office item was invented by Bette Nesmith Graham in 1951?

    • Options
    • A. Fax machine
    • B. Stapler
    • C. Liquid Paper
    • D. Copy machine
    • Discuss
    • 9. In which decade was the telephone invented?

    • Options
    • A. 1850s
    • B. 1860s
    • C. 1870s
    • D. 1880s
    • Discuss
    • 10. In which decade was the SPICE simulator introduced?

    • Options
    • A. 1950s
    • B. 1960s
    • C. 1970s
    • D. 1980s
    • Discuss


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