10 most difficult technology riddlesTechnology quiz
What does the logo of Citroën symbolize?
Spruce, typical for the Vosges
Upwards pointing arrow - strive for perfection
Chevrons referring to the military connections of the company
The origin of the logo may be traced back to a trip made by the 22-year-old André Citroën to Łódź city, Poland, where he discovered an innovative design for a chevron-shaped gear used in milling. He bought the patent for its application in steel and started his company which initially produced gears.
When was the first machine gun patented?
On May 15, 1718, Englishman James Puckle patented his machine gun, the world's first! You may have thought the Gatling gun or the Maxim machine gun was the first machine gun, but depending on how you define “machine gun” James Puckle, Esq. (yes, he was a lawyer) got there first.
Cranberry glass is made by adding ..?
Cranberry glass or 'Gold Ruby' glass is a red glass made by adding gold salts or colloidal gold to molten glass. The glass is typically hand blown or molded. Legend holds that cranberry glass was first discovered when a noble tossed a gold coin into a mixture of molten glass
Which type of transmission uses the shortest waves?
The Ku band is the portion of the electromagnetic spectrum in the microwave range of frequencies from 12 to 18 gigahertz (GHz). Ku band is primarily used for satellite communications, most notably for fixed and broadcast services, and for specific applications such as NASA's Tracking Data Relay Satellite used for both space shuttle and International Space Station
What was the first car equipped with an airbag?
Cadillac de Ville
1974 in Cadillac de Ville also saw the introduction of the optional "Air Cushion Restraint System". Known today as airbags, this option provided protection for front seat occupants in the case of a frontal collision. One bag was located in the steering wheel, the other in the dashboard in front of the front seat passenger.
Who in 1838 invented stereoscopic apparatus?
The original stereoscopic apparatus was invented in 1838 by Sir Charles Wheatstone from Gloucestershire, in the year of the birth of photography, yet his early experiments employed drawings instead of photographs, viewed through a system of angled mirrors.
Are gas fittings tightened clockwise or anti-clockwise?
it depends on the gas
there is no standard
Some gas fittings use reverse threads to prevent disastrous misconnections. For example, oxygen fittings are right-handed, but acetylene and other flammable gases use left-handed fittings.
Where does the name rosin come from?
from the ancient Ionian city
from the tree name
from the name of the dye
from the name of the inventor
Rosin, also called colophony is a solid form of resin obtained from pines and some other plants, mostly conifers, produced by heating fresh liquid resin to vaporize the volatile liquid terpene components. The term "colophony" comes from colophonia resina, Latin for "resin from Colophon", an ancient Ionic city.
Which country was the first to construct a "fire-and-forget" type anti-ship missile?
The Penguin anti-ship missile, designated AGM-119 by the U.S. military, is a Norwegian passive IR seeker-based short-to-medium range anti-ship guided missile, designed for naval use. A "fire-and-forget" missile, the Penguin has a 360 degree arc, autonomous search, acquisition and track during terminal phase, discriminates between target decoys and is resistant to IR countermeasures.