Who is the primary inventor of the light bulb?
Answer: C
Thomas Alva Edison.
He did not invent the idea of the electric lamp but produced the first commercially practical one in 1879, with a carbonised filament in a high vacuum that burned for over forty hours. Joseph Swan in England developed one independently at the same time.
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Screw was invented in 3rd century B.C by
Answer: C
Archimedes is credited with it.
The Archimedes screw, a helix inside a cylinder, raises water when turned, and was used to drain ships and irrigate fields. The screw as a fastener came much later, but the helical principle is his.
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The World Wide Web was first made public by which English computer scientist?
Answer: B
It was Sir Tim Berners-Lee.
He proposed a hypertext system at CERN in 1989 and wrote the first browser and server the following year. He gave the technology away, and CERN placed it in the public domain in 1993.
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First pressure sensitive adhesive tape was invented in 1845 by
Answer: B
It was Dr Horace Day.
The American surgeon made a surgical tape in 1845 by spreading a rubber adhesive on strips of fabric - the first pressure-sensitive adhesive tape. Richard Drew's masking tape of 1925 and Scotch tape of 1930 followed the same idea.
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Periscope was invented in 1902 by
Answer: C
Simon Lake invented it.
The American submarine designer patented the periscope in 1902, using prisms and lenses in a tube so that a submerged submarine could see the surface. His Argonaut had been the first submarine to operate in the open sea.
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The first freely programmable computer in the world was built by
Answer: C
Konrad Zuse built it.
His Z3, completed at Berlin in 1941, used electromagnetic relays and read its program from punched film. It was the first working programmable, fully automatic digital computer, and was destroyed in an air raid in 1943.
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Who Invented Worldwide Standard Time Zones ?
Answer: D
Sir Sandford Fleming proposed them.
The Scottish-Canadian engineer, having missed a train in Ireland through a printed timetable's ambiguity, proposed in 1879 dividing the world into twenty-four zones an hour apart. The system was adopted at the International Meridian Conference in 1884.
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Who Invented the First Adhesive Tape ?
Answer: A
Richard Gurley Drew invented it.
Working for 3M, he made masking tape in 1925 for car painters doing two-tone jobs, and transparent Scotch tape in 1930. The nickname is said to come from a painter's complaint that the firm's Scotch bosses had been too sparing with the adhesive.
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Who invented the first practical safety razor with disposable blades ?
Answer: B
Correct answer: King C. Gillette
King Camp Gillette patented the disposable-blade safety razor in 1904. His commercial insight mattered as much as the invention: selling the handle cheaply and profiting from the blades became a model many industries later copied.
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Who is known as inventor of World Wide Standard Time ?
Answer: A
It was Sandford Fleming.
He proposed a single worldwide standard time divided into twenty-four hourly zones in 1879, and the scheme was adopted internationally in 1884 with Greenwich as the prime meridian.
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