General Knowledge MCQs
Topic Notes: General Knowledge
MCQs and preparation resources for competitive exams, covering important concepts, past papers, and detailed explanations.
Plato
- Biography: Ancient Greek philosopher (427–347 BCE), student of Socrates and teacher of Aristotle, founder of the Academy in Athens.
- Important Ideas:
- Theory of Forms
- Philosopher-King
- Ideal State
41
Who are credited with inventing the cinematograph and the first motion picture camera?
Answer:
The Lumière Brothers
Auguste and Louis Lumière patented the cinematograph in 1895, which allowed for the recording and projecting of motion pictures.
42
Who invented Velcro after noticing burrs sticking to his dog's fur?
Answer:
George de Mestral
Swiss engineer George de Mestral invented the hook-and-loop fastener system known as Velcro in the 1940s.
43
Who invented Kevlar, the material used in bulletproof vests?
Answer:
Stephanie Kwolek
Stephanie Kwolek invented Kevlar at DuPont in 1965. It is a heat-resistant and strong synthetic fiber.
44
Who invented the marine chronometer, solving the problem of calculating longitude at sea?
Answer:
John Harrison
John Harrison, a carpenter and clockmaker, solved the 'longitude problem' by creating a clock accurate enough to keep time on a moving ship.
45
Who invented the first modern air conditioning system?
Answer:
Willis Carrier
Willis Carrier designed the first modern air-conditioning system in 1902 to control humidity in a printing plant.
46
Who invented the modern steam turbine?
Answer:
Charles Parsons
Sir Charles Parsons invented the compound steam turbine in 1884, which revolutionized marine propulsion and electrical power generation.
47
Who proposed the theory of Continental Drift?
Answer:
Alfred Wegener
Alfred Wegener proposed in 1912 that the continents were once joined together in a single supercontinent called Pangea and have since drifted apart.
48
Who is considered the 'Father of Genetics' for his work with pea plants?
Answer:
Gregor Mendel
Gregor Mendel, an Austrian monk, discovered the fundamental laws of inheritance through his experiments with pea plants in the 19th century.
49
Who discovered the principle of buoyancy (displacement of fluid)?
Answer:
Archimedes
Archimedes' principle states that the upward buoyant force on a body immersed in a fluid is equal to the weight of the fluid that the body displaces.
50
Who is credited with inventing the first practical telescope?
Answer:
Hans Lippershey
While Galileo made it famous, Hans Lippershey, a Dutch spectacle maker, applied for the first patent for a telescope in 1608.