10 most difficult technology riddles A list of ten (out of 154) technology related questions that are the most often answered incorrectly Technology quiz Use of brown powder was one of the major naval artillery improvements of the late 19th century. What was its advantage over black powder?It burns slower. The introduction of brown powder, which burned less rapidly than black powder, allowed to use longer barrels, which resulted in greater accuracy. Slower-burning powder decreases firing stresses, allowing guns to last longer and to be manufactured to tighter tolerances.very hard 27% it burns slowerit burns slower27%it burns quickerit burns quicker15%it is water-resistantit is water-resistant41%it is more explosiveit is more explosive15%Created by: globalquiz.org. Statistics based on 3997 answers in 2 languages »navy riddles » What is the most common element (by mass) forming the planet Earth?Iron is most abundant in the Earth's outer and inner core, and it is the fourth most common element in the Earth's crust.very hard 31% carboncarbon27%oxygenoxygen19%ironiron31%siliconsilicon21%Created by: globalquiz.org. Statistics based on 6291 answers in 2 languages »Earth riddles » Are gas fittings tightened clockwise or anti-clockwise?It depends on the gas. 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.very hard 31% clockwiseclockwise22%anti-clockwiseanti-clockwise38%it depends on the gasit depends on the gas31%there is no standardthere is no standard7%Created by: globalquiz.org. Statistics based on 3147 answers in 4 languages »gases riddles » During a full 24-hour day, how many times would the hands of a clock overlap?22. The minute hand makes 24 revolutions, while the hour hand makes 2 revolutions.very hard 32% 666%121221%222232%242439%Created by: globalquiz.org. Statistics based on 6107 answers in 2 languages »time riddles » Which numeral system was in use in ancient Sumer and Babilon?Sexagesimal. Remnants of highly composite sexagesimal system are in use even today for measuring angles, geographic coordinates and especially time. An hour of time is divided into 60 minutes, which in turn are divided into 60 seconds. very hard 32% octaloctal21%binarybinary19%decimaldecimal26%sexagesimalsexagesimal32%Created by: smyru. Statistics based on 9027 answers in 2 languages »numbers riddles » How long did Neil Armstrong’s first moon walk last?2½ hours. Each of the subsequent five Apollo program landings were allotted gradually longer periods for EVA activities – the crew of Apollo 17, by comparison, spent over 22 hours exploring the lunar surface.very hard 33% 2 minutes2 minutes32%½ hour½ hour30%2½ hours2½ hours33%2 days2 days4%Created by: globalquiz.org. Statistics based on 3525 answers in 2 languages »Moon riddles » What term would photographers use to describe the quality of blurred part of the photo? Bokeh has been defined as "the way the lens renders out-of-focus points of light". It can be good or unpleasant, depending on the lens aberrations and aperture shape. The term comes from Japanese for "blur".very hard 33% diffractiondiffraction33%bokehbokeh33%outfieldoutfield19%overexposureoverexposure13%Created by: globalquiz.org. Statistics based on 4686 answers in 2 languages »optics riddles » This is an iron buoy. Where were its atoms formed?In a high-mass star preceding Sun. Radioactive nickel-56 (which decays to the most common isotope of iron) is the last element to be produced before the collapse of a supernova. That is why the iron was abundantly scattered into space after the supernova explosion.very hard 34% in a high-mass star preceding Sunin a high-mass star preceding Sun34%in the Sunin the Sun8%in the Earth's corein the Earth's core29%in the Earth's crustin the Earth's crust26%Created by: life-o-holic. Statistics based on 9891 answers in 2 languages »elements riddles » What was the main weakness of Colt revolvers, comparing to its competitors?Lack of possibility to use metallic cartridges. Samuel Colt missed a great opportunity in firearms development when he dismissed an idea from one of his gunsmiths, Rollin White. White proposed a "bored-through" revolver cylinder to allow the use of metallic cartridges in a handgun. After Colt fired White for suggesting an improvement to his revolver, White took his idea to Colt's competitor, Smith & Wesson, who patented his invention and kept Colt from being able to build cartridge firearms for almost 20 years.very hard 34% low speedlow speed25%low durabilitylow durability10%lack of possibility to use metallic cartridgeslack of possibility to use metallic cartridges34%poor shooting precisionpoor shooting precision29%Created by: globalquiz.org. Statistics based on 4115 answers in 4 languages »inventors riddles » What was the exposure time of this photo?About 1 hour. The length of stars trails is pretty much the same as the distance travelled by an hour hand of clock during 30 minutes. But the Earth rotates twice as slow compared to the hour hand of a clock (one rotation per day, while clock's hour hand makes two).very hard 35% about 10 secondsabout 10 seconds18%about 10 minutesabout 10 minutes12%about 1 hourabout 1 hour35%about 8 hoursabout 8 hours33%Created by: globalquiz.org. Statistics based on 5288 answers in 2 languages »photography riddles » Play technology quiz and see all the questions.