Industrial Era — Set 4
Inventions · औद्योगिक युग · Questions 31–40 of 50
The 'Motion Picture Camera', known as the Kinetograph, was patented in the US by?
Correct Answer: C. Thomas Edison
• **Thomas Edison** = His laboratory developed the Kinetograph to capture moving images on film strips. • The Kinetograph, patented in **1891**, — along with the Kinetoscope for viewing, launched the film industry. • 💡 Wrong-option analysis: Lumiere Brothers: developed the Cinématographe for projection; George Eastman: founded Kodak, known for photographic film; Louis Le Prince: an early pioneer in filming, but didn't patent the Kinetograph.
Who invented the 'Steel Plow', which helped farmers break through tough prairie soil?
Correct Answer: C. John Deere
• **John Deere** = He developed a self-scouring steel plow in 1837 because traditional iron plows were ineffective in heavy soil. • The steel plow, invented in **1837**, — allowed soil to slide off easily without sticking and was vital for agricultural expansion in the American Midwest. • 💡 Wrong-option analysis: Eli Whitney: invented the cotton gin and interchangeable parts; Cyrus McCormick: invented the mechanical reaper; Henry Ford: pioneered the assembly line for automobiles.
The process of 'Bakelite' invention, the first fully synthetic plastic, is credited to?
Correct Answer: A. Leo Baekeland
• **Leo Baekeland** = He created Bakelite in 1907 by combining phenol and formaldehyde under pressure. • Bakelite, invented in **1907**, — was resistant to heat and electricity, making it perfect for early industrial parts and marked the beginning of the 'Age of Plastics'. • 💡 Wrong-option analysis: John Hyatt: invented celluloid, an early plastic; Charles Goodyear: developed vulcanized rubber; Alexander Parkes: created Parkesine, another early plastic.
The first practical 'Stethoscope' for medical diagnosis was invented by?
Correct Answer: C. René Laennec
• **René Laennec** = He invented the stethoscope in **1816** to listen to heart and lung sounds more clearly. • The stethoscope, invented in **1816**, — was first a simple wooden tube and remains an essential tool for doctors worldwide. • 💡 Wrong-option analysis: Joseph Lister: pioneered antiseptic surgery; Louis Pasteur: developed pasteurization and vaccines; Florence Nightingale: a pioneer of modern nursing.
Who invented the 'Barbed Wire', which fundamentally changed ranching and land ownership?
Correct Answer: D. Joseph Glidden
• **Joseph Glidden** = He patented the most successful design of barbed wire in 1874. • The barbed wire, patented in **1874**, — allowed for cheap and effective fencing of large areas of land, effectively ending the era of the 'open range' for livestock. • 💡 Wrong-option analysis: Isaac Singer: made improvements to the sewing machine; Samuel Colt: developed the revolving firearm; John Deere: invented the steel plow.
The 'Morse Code' for telegraphy was co-developed by Samuel Morse and whom?
Correct Answer: A. Alfred Vail
• **Alfred Vail** = He was a key partner of Samuel Morse who helped refine the system of dots and dashes for telegraphy. • Vail's contribution to Morse Code, refined by **1844**, — revolutionized global communication for over a century. • 💡 Wrong-option analysis: Alexander Bell: invented the telephone; Joseph Henry: made important discoveries in electromagnetism; Thomas Edison: prolific inventor, not specifically involved in Morse Code development.
The 'Spinning Mule', which combined the features of the spinning jenny and the water frame, was invented by?
Correct Answer: C. Samuel Crompton
• **Samuel Crompton** = His invention, the Spinning Mule, allowed for the production of much finer and stronger yarn than previous machines. • The Spinning Mule, developed around **1779**, — combined features of the spinning jenny and water frame, giving British textile manufacturers a massive competitive advantage. • 💡 Wrong-option analysis: Richard Arkwright: invented the water frame; John Kay: invented the flying shuttle; James Hargreaves: invented the spinning jenny.
Who developed 'Standardized Parts' (Interchangeable Parts) for mass production, first using them for muskets?
Correct Answer: B. Eli Whitney
• **Eli Whitney** = He promoted the idea that machines should produce identical parts so that any part could fit into any assembly. • The concept of standardized parts, pioneered by **Eli Whitney** in the late 18th century for muskets, — was the precursor to the modern assembly line, making complex machine manufacturing and repair easier and cheaper. • 💡 Wrong-option analysis: Henry Ford: pioneered the assembly line for mass-producing automobiles, building on Whitney's concept; James Watt: improved the steam engine; Robert Fulton: developed the first commercially successful steamboat.
The first 'Steam Locomotive' intended for a railway was built by?
Correct Answer: A. Richard Trevithick
• **Richard Trevithick** = He built the first high-pressure steam engine and the first working railway locomotive in 1804. • Trevithick's locomotive, built in **1804**, — proved the concept of steam railway transport, despite being too heavy for the iron tracks of that time. • 💡 Wrong-option analysis: George Stephenson: later refined locomotive technology for commercial use (e.g., 'Rocket'); James Watt: improved the steam engine but did not build a locomotive; Matthew Boulton: Watt's business partner.
The 'Battery' (Voltaic Pile), the first source of continuous electric current, was invented by?
Correct Answer: C. Alessandro Volta
• **Alessandro Volta** = He stacked alternating discs of zinc and copper separated by cardboard soaked in saltwater to produce electricity, creating the first battery. • The Voltaic Pile, invented in **1800**, — was the first source of continuous electric current, allowing scientists to study steady electricity, and the Volt is named in his honor. • 💡 Wrong-option analysis: Michael Faraday: discovered electromagnetic induction; Benjamin Franklin: conducted experiments with electricity, including the kite experiment; Luigi Galvani: discovered bioelectricity through frog leg experiments.