A. Pneumatic rubber tire B. Automobile wheel rim C. Rubber boot D. Model airplanes Explanation: Invented in 1887.
A. Diving bell B. Steam boat C. Hot air balloon D. Rotary steam engine
A. Dynamite B. Ladders C. Race cars D. Parachute Explanation: Many people who tried to test the first parachutes died…
A. Sir Frank Whittle B. Gottlieb Daimler C. Roger Bacon D. Lewis E. Waterman Explanation: Dr. Hans von Ohain and…
A. Michael Faraday B. Fahrenheit C. Sir Alexander Graham Bell D. Thomas Alva Edison Explanation: Gramophone was invented by Thomas…
A. Bifocal spectacles B. Radio C. Barometer D. Hygrometer Explanation: Invented in 1760.
A. G. Ferdinand Von Zeppelin B. Sir Frank Whittle C. Roger Bacon D. Leo H Baekeland
A. The brake used in modern elevators B. Jet Engine C. Turbine D. Hydraulic Crane Explanation: In 1853, American inventor…
A. 1810s B. 1840s C. 1870s D. 1890s Explanation: On May 24, 1844, Samuel Morse send his famous message, "What…
A. Screw propellor B. Electric streetcar C. Chesterfield D. Sleeping (railway) car