Practice MCQ Questions and answers on Inventions-GK

The first lawn mowers were not engine powered. Invented in 1830 by Edwin Budding of England, the mowers were turning blades on wooden sticks used to cut grass. Engine powered mowers were not invented until 1919 by an American Army colonel, who used the motor from a washing machine.

In 1904, John Ambrose Fleming invented the first practical electron tube called the 'Fleming Valve', which is a diode rectifier. In 1906, Lee de Forest invented the Audion later called the triode, which provided signal amplification.

George Gamow, who died in 1968, was a physicist, who published "Thirty Years that Shook Physics".

The board was invented by Isaac and William Fuld. The word 'Ouija' comes from the French and German words for 'yes', 'oui' and 'ja'.

Lewis Edson Waterman patented the first practical fountain pen in 1884.

The first elevator was built in the palace of King Louis XV in 1743. It only traveled up one floor, and was hand powered by men inside the chimney.

The card was invented by Frank McNamara and Ralph Schneider.

Enrico Fermi ( 29 September 1901 – 28 November 1954) was an Italian (later naturalized American) physicist and the creator of the world's first nuclear reactor, the Chicago Pile-1.

The Electric Drill was the invention of Arthur James Arnot. On 20 August 1889 he patented his design while working for the Union Electric Company in Melbourne. His original design was meant primarily for drilling rock to find coal.

The smallpox vaccine, introduced by Edward Jenner in 1796, was the first successful vaccine to be developed. He observed that milkmaids who previously had caught cowpox did not catch smallpox and showed that inoculated vaccinia protected against inoculated variola virus.