The most difficult technical riddles A list of technical related questions that are most often answered incorrectly Technology quiz What is a tachymeter?An instrument designed to measure angles and distances. A tachymeter or tacheometer is a type of theodolite used for rapid measurements and determines, electronically or electro-optically, the distance to target. The principles of action are similar to those of rangefinders. very hard 24% an instrument designed to measure angles and distancesan instrument designed to measure angles and distances24%device designed to measure the speed of vehicle movementdevice designed to measure the speed of vehicle movement17%device for measuring the acceleration of heart ratedevice for measuring the acceleration of heart rate32%an instrument measuring the speed of rotation of the drive shaft in the enginean instrument measuring the speed of rotation of the drive shaft in the engine25%Created by: Tschuka . Statistics based on 157 answers in 2 languages »science riddles » What country has got the most permanent research stations in Antarctica?Argentina mantains the most permanent polar stations - 6|Chile - 5|Russia - 5|Poland - 1very hard 26% ArgentinaArgentina26%ChileChile13%PolandPoland15%RussiaRussia44%Created by: lukasz Poland. Statistics based on 695 answers in 2 languages »Chile riddles » What was the name of the first semi-automatic pistol?Borchardt C93. The Borchardt C-93 semi-automatic pistol was designed by Hugo Borchardt in 1893 based upon the Maxim toggle-bolt design.. With about 1,100 manufactured by Loewe and nearly 2,000 more produced by Deutsche Waffen und Munitionsfabriken, the Borchardt C-93 was the first mass-produced semi-automatic pistol. very hard 26% Glock 17Glock 1740%AK-74AK-744%Borchardt C93Borchardt C9326%None of the above is a semi-automatic pistolNone of the above is a semi-automatic pistol28%Created by: Tschuka . Statistics based on 2591 answers in 2 languages »World War I riddles » What was the name of the first and only Soviet space shuttle?Buran (Snowstorm or Blizzard) was the first spaceplane to be produced as part of the Soviet Buran programme. OK-1K1 completed one unmanned spaceflight in 1988, and was destroyed in 2002 It remains the only Soviet reusable spacecraft to be launched into space. very hard 27% UralUral19%BuranBuran27%GagarinGagarin21%BaikalBaikal31%Created by: Tschuka . Statistics based on 3125 answers in 2 languages »astronautics riddles » Which Greek inventor is called the "father of pneumatics"?Ctesibius or Ktesibios or Tesibius was a Greek inventor and mathematician in Alexandria, Ptolemaic Egypt. He wrote the first treatises on the science of compressed air and its uses in pumps (and even cannons). This, in combination with his work on the elasticity of air, earned him the title of "father of pneumatics." very hard 29% CtesibiusCtesibius29%PlatonPlaton7%AristotleAristotle19%None of the above, the concept of pneumatics is RomanNone of the above, the concept of pneumatics is Roman43%Created by: Tschuka . Statistics based on 637 answers in 2 languages »physics riddles » Which of these is not one of the basic units of the SI system?V (volt). The International System of Units (abbreviated as SI) is the modern form of the metric system, and is the most widely used system of measurement. It comprises a coherent system of units of measurement built on seven base units (ampere, kelvin, second, metre, kilogram, candela, mole) and a set of twenty decimal prefixes to the unit names and unit symbols.very hard 31% V (volt)V (volt)31%A (ampere)A (ampere)8%MoleMole33%Cd (candela)Cd (candela)26%Created by: Tschuka . Statistics based on 2810 answers in 2 languages »technology riddles » Which European city has the most skyscrapers?In Moscow. In 2012, seven out of the fifteen highest skyscrapers in Europe were in Moscow. Another few high-rise buildings are under construction.hard 45% in Londonin London25%in Frankfurtin Frankfurt22%in Moscowin Moscow45%in Madridin Madrid6%Created by: Tschuka . Statistics based on 34283 answers in 3 languages »skyscrapers riddles » Brass is an alloy made of ...Zinc and copper. Brass is a metallic alloy that is made of copper and zinc. The proportions of zinc and copper can vary to create different types of brass alloys with varying mechanical and electrical properties.hard 58% nickel and coppernickel and copper8%zinc and copperzinc and copper58%bronze and copperbronze and copper29%brass is a chemical elementbrass is a chemical element3%Created by: Tschuka . Statistics based on 1821 answers in 2 languages »metals riddles » Which company invented the floppy disk?IBM American company, which is one of the oldest IT companies in the world - developed many key technologies used in computer science, like hard drive, cursor, floppy disk.average 63% AcornAcorn17%IBMIBM63%AppleApple11%MicrosoftMicrosoft8%Created by: Tschuka . Statistics based on 298 answers in 2 languages »computers riddles » Play technology quiz and see all the questions.