51. What African-American inventor received 5 patents in the field of shoemaking? A. Elijah McCoy B. Jan Ernst Matzeliger C. Ernest Just D. Lewis Latimer Answer: B. Jan Ernst Matzeliger Explanation: Matzeliger never benefited financially from his inventions. He died in 1889 at the age of 37 from tuberculosis. 52. It travels over land and
more..41. Who was the first American female to patent her invention, a method of weaving straw with silk? A. Marjorie Joyner B. Margaret Knight C. Amanda Jones D. Mary Kies Answer: D. Mary Kies Explanation: Mary was not the first American woman inventor to be sure, there were many female inventors before her, but they
more..31. When was the toothbrush invented? A. 1770 B. 1765 C. 1790 D. 1742 Answer: A. 1770 Explanation: The first toothbrush was made out of a bone and small brush, by jail prisoner William Addis of England. 32. What item of apparel was invented by Ellery
more..21. Who invented Jet Engine? A. Sir Frank Whittle B. Gottlieb Daimler C. Roger Bacon D. Lewis E. Waterman Answer: A. Sir Frank Whittle Explanation: Dr. Hans von Ohain and Sir Frank Whittle are recognized as the co-inventors of the jet engine. Each was working separately and knew nothing of the others work. Although Whittle
more..11 What is the name of the CalTech seismologist who invented the scale used to measure the magnitude of earthquakes? A. Charles Richter B. Hiram Walker C. Giuseppe Mercalli D. Joshua Rumble Answer: A. Charles Richter Explanation: Richter was born on an Ohio farm in 1900. He died in 1985. 12. What Galileo invented? A.
more..This is the Part 1 general knowledge questions and answers section on “Inventions” with explanation for various interview, competitive examination and entrance test. Solved examples with detailed answer description, explanation are given and it would be easy to understand. 1. Who invented the BALLPOINT PEN? A. Biro Brothers B. Waterman Brothers C. Bicc Brothers
more..This is the General Knowledge reference section on “Important Official Books” with explanation for various interview, competitive examination and entrance test. Solved examples with detailed answer description, explanation are given and it would be easy to understand. BLUE BOOK Official report of the British Government GREEN BOOK Official Italian and Persian Publication GREY BOOK Official
more..This is the General Knowledge reference guide on “Old And New Names Of Places” with detailed tips, explanation are given and it would be easy to understand. OLD NAME NEW NAME Abyssinia Ethiopia Angora Ankara Aurangabad Sambhaji Nagar Banaras Varanasi Baroda Vadodara Batavia djakarata Basutoland Lesotho Bechuanaland Botswana Bombay Mumbai British Guiana Guyana Burma Myanmar
more..This is the General Knowledge reference guide on “Country With Flower Emblem” with detailed tips, explanation are given and it would be easy to understand. COUNTRY FLOWER EMBLEM IRELAND Shamrock CANADA Maple JAPAN Chrysanthemum FRANCE Lily SCOTLAND Thistle GERMANY Cornflower SPAIN Pomegranate INDIA lotus UNITED KINGDOM rose
more..This is the General Knowledge reference guide on “National Emblems Of Different Countries” with detailed tips, explanation are given and it would be easy to understand. COUNTRY EMBLEM AUSTRALIA Kangaroo BANGLADESH Water Lily BARBADOS Head of Trident BELGIUM Lion CANADA White Lily CHILE Candor and Huemul DENMARK Beach DOMINICA Sisserou parrot FRANCE Lily GERMANY Corn
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