Important Inventions and Discoveries in World – Exercise – 1

6. This statesman, politican, scholar, inventor, and one of early presidents of USA invented the swivel chair, the spherical sundial, the moldboard plow, and the cipher wheel.

(a) George Washington
(b) Alexander Hamilton
(c) John Adams
(d) Thomas Jefferson

Answer
Answer : (d)
Explanation
Explanation :  Thomas Jefferson (April 13, 1743 – July 4, 1826) was the third President of the United States (1801-1809) and the principal author of the Declaration of Independence (1776). Let us discuss.
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7. What J. B. Dunlop invented?

(a) Pneumatic rubber tire
(b) Automobile wheel rim
(c) Rubber boot
(d) Model airplanes

Answer
Answer : (a)
Explanation
Explanation :  John Boyd Dunlop, a veterinary surgeon, invented the pneumatic tyre in 1887. Let us discuss.
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8. What Galileo invented?

(a) Barometer
(b) Pendulum clock
(c) Microscope
(d) Thermometer

Answer
Answer : (d)
Explanation
Explanation :  Various authors have credited the invention of the thermometer to Cornelius Drebbel, Robert Fludd, Galileo Galilei or Santorio Santorio. The thermometer was not a single invention, however, but a development. Galileo Galilei also discovered that objects (glass spheres filled with aqueous alcohol) of slightly different densities would rise and fall, which is nowadays the principle of the Galileo thermometer (shown). Today such thermometers are calibrated to a temperature scale. Let us discuss.
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9. Ralph Samuelson was only 18 when he invented this sporting item in 1922. What was that?

(a) Golf tee
(b) Motorboat
(c) Water skis
(d) Hang glider

Answer
Answer : (c)
Explanation
Explanation :  The new item was first used on Lake Pepin in Minnesota. Let us discuss.
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10. What groovy item was invented by Englishman Edward Craven Walker in 1963?

(a) Leisure suit
(b) Lava lamp
(c) Eight-track tape deck
(d) Hot comb

Answer
Answer : (b)
Explanation
Explanation :  Groovy, baby! Lava lamps, which were a fixture in every hip pad in the 1960s and 70s, featured a mixture of water and colored oil that created swirl patterns when heated by a light bulb. Let us discuss.
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