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's laboratory developed the Kinetograph to capture moving images on film strips. This invention, along with the Kinetoscope for viewing, launched the film industry. Edison's work was central to the early commercial development of cinema.
Who invented the 'Steel Plow', which helped farmers break through tough prairie soil?
Correct Answer: C. John Deere
John Deere developed a self-scouring steel plow in 1837 because traditional iron plows were ineffective in heavy soil. The smooth steel surface allowed soil to slide off easily without sticking. This invention was vital for the agricultural expansion of the American Midwest.
The process of 'Bakelite' invention, the first fully synthetic plastic, is credited to?
Correct Answer: A. Leo Baekeland
Leo Baekeland created Bakelite in 1907 by combining phenol and formaldehyde under pressure. This material was resistant to heat and electricity, making it perfect for early industrial parts and consumer goods. It marked the beginning of the 'Age of Plastics'.
The first practical 'Stethoscope' for medical diagnosis was invented by?
Correct Answer: C. René Laennec
René Laennec invented the stethoscope in 1816 to listen to heart and lung sounds more clearly. His first version was a simple wooden tube, which he developed to avoid placing his ear directly on patients' chests. It remains an essential tool for doctors worldwide.
Who invented the 'Barbed Wire', which fundamentally changed ranching and land ownership?
Correct Answer: D. Joseph Glidden
Joseph Glidden patented the most successful design of barbed wire in 1874. This allowed for the cheap and effective fencing of large areas of land where wood was scarce. It effectively ended the era of the 'open range' for livestock.
The 'Morse Code' for telegraphy was co-developed by Samuel Morse and whom?
Correct Answer: A. Alfred Vail
Alfred Vail was a key partner of Samuel Morse who helped refine the system of dots and dashes. He also played a significant role in developing the actual telegraph hardware. The code revolutionized global communication for over a century.
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's invention allowed for the production of much finer and stronger yarn than previous machines. It gave British textile manufacturers a massive competitive advantage in the global market. The mule could spin thousands of threads simultaneously in large factories.
Who developed 'Standardized Parts' (Interchangeable Parts) for mass production, first using them for muskets?
Correct Answer: B. Eli Whitney
Eli Whitney promoted the idea that machines should produce identical parts so that any part could fit into any assembly. This concept was the precursor to the modern assembly line. It made the repair and manufacturing of complex machines much easier and cheaper.
The first 'Steam Locomotive' intended for a railway was built by?
Correct Answer: A. Richard Trevithick
Richard Trevithick built the first high-pressure steam engine and the first working railway locomotive in 1804. Although his machine was too heavy for the iron tracks of that time, it proved the concept. George Stephenson later refined this technology for commercial use.
The 'Battery' (Voltaic Pile), the first source of continuous electric current, was invented by?
Correct Answer: C. Alessandro Volta
Alessandro Volta stacked alternating discs of zinc and copper separated by cardboard soaked in saltwater to produce electricity. This was the first time scientists could study a steady flow of electricity rather than just static sparks. The unit of electrical potential, the Volt, is named in his honor.