10 most difficult history of technics riddlesTechnology quiz
Which company produced the world's first commercial jet airliner?
English-made de Havilland DH 106 Comet was introduced in 1952 by British Airways. A year after, Comet airframes began suffering catastrophic metal fatigue, with three of them tearing apart during mid-flight.
When Joseph-Louis Lambot used reinforced concrete for the first time?
In 1841 he started constructing water tanks using cement mortar and iron reinforcement. In 1848 he constructed his first boat using the same system which was later presented at the 1855 World's Fair in Paris.
Who created the QWERTY keyboard layout?
Christopher Latham Sholes
Thomas Alva Edison
QWERTY - a symbolic Latin alphabetical name for typewriters and computers, taken from the first six letters in a row below the row of digits, viewed from the left. The first typewriters used an alphabetical key setting. However, with the fast typing of the neighborhood of frequently used keys caused mutual jamming of the arms with the fonts. In 1878, the first typewriter with a QWERTY keyboard was patented. The creator of the QWERTY layout was American journalist and inventor Christopher Latham Sholes.
By what were the first London Underground trains pulled?
Ventilation shafts at various points on the route allowed the engines to expel steam and bring fresh air into the tunnels. These shafts were sometimes hidden behind false facades, like the one in the photo (Leinster Gardens 23). The right-hand property is a fake.
Where was the world’s first regular TV service?
the United States
The first regular high-definition (then defined as at least 200 lines) television service from the BBC started on November 2, 1936. Programs were broadcast daily, Monday to Saturday, at 15:00–16:00 and 21:00–22:00.
The Antikythera mechanism was used to...
predict positions of astronomical objects
it is not known
predict cycles of tides
predict solar eclipses only
The Antikythera mechanism is an ancient Greek analogue computer and orrery used to predict astronomical positions and eclipses for calendar and astrological purposes decades in advance. It could also be used to track the four-year cycle of athletic games which was similar to an Olympiad, the cycle of the ancient Olympic Games.
Which non-electronic musical instrument has the most complex design?
The classical organ is recognized as the most complex man-made device until the late 19th century, when it was displaced by the telephone exchange. Large pipe organs have seven keyboards, complex wind system and up to 20,000 pipes.
Which of the following objects did not appear on the early photographs, because they had been too difficult to capture?
Because of very long exposure times (up to several hours), first photographers pointed their cameras at static objects. The first photo of a person was made by accident by Louis Daguerre in 1838. He depicted a pedestrian who stopped for a shoe shine, taking a photo of Paris streets.