Ausbildung Aptitude Test (Einstellungstest) · Working Life and Technical Understanding

Technical Understanding

56 practice questions, each with the answer and an explanation.

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Random questions from this topic, one at a time. You see the answer and the explanation straight after each one.

All 56 questions

  1. A lever has a pivot. A force of 50 N acts 2 m from the pivot. The load is 0.5 m from the pivot on the other side. What load balances the lever?
  2. Gear A has 20 teeth and drives gear B with 40 teeth. When A makes 10 turns, how many turns does B make?
  3. Two resistors of 6 ohms are connected in series. What is the total resistance?
  4. Two resistors of 6 ohms are connected in parallel. What is the total resistance?
  5. A motor runs on 230 V and draws 2 A. What is its power?
  6. In a hydraulic press, the small piston has an area of 2 square cm and the large piston has 20 square cm. A force of 50 N acts on the small piston. What force acts on the large piston?
  7. Aluminium has a density of 2.7 g per cubic cm. What is the mass of 10 cubic cm?
  8. What does a single fixed pulley do?
  9. Which tool measures small thicknesses, such as that of a wire, to a hundredth of a millimetre?
  10. When does a solid object float in a liquid?
  11. Which of these reduces friction between two moving metal parts?
  12. A 2 kW heater runs for 3 hours. Electricity costs 0.30 euros per kWh. What is the cost?
  13. A mechanic pulls a spanner 0.3 m long with a force of 100 N at right angles. What torque is applied?
  14. Which of these materials is a good electrical insulator?
  15. A belt connects a small wheel of 10 cm diameter and a large wheel of 30 cm diameter. The small wheel turns at 90 revolutions per minute. How fast does the large wheel turn?
  16. A child weighing 300 N sits 1 m from the pivot of a seesaw. At what distance must an adult weighing 200 N sit on the other side to balance it?
  17. Water in a tank is 2 m deep. What pressure does the water produce at the bottom (density 1,000 kg per cubic metre, g = 10 m/s2)?
  18. A pump lifts 50 kg of water by 10 m in 25 seconds (g = 10 m/s2). What power does it deliver?
  19. Two 10 ohm resistors in parallel are connected in series with a 5 ohm resistor. What is the total resistance?
  20. A constant force of 120 N moves an object 5 m in the direction of the force. How much work is done?
  21. A constant force of 30 N moves an object 25 m in the direction of the force. How much work is done?
  22. A lever is balanced. A force of 12 N acts at a distance of 40 cm from the pivot. What force acts at a distance of 8 cm on the other side?
  23. A lever is balanced. A force of 80 N acts at a distance of 25 cm from the pivot. What force acts at a distance of 10 cm on the other side?
  24. A gear with 30 teeth turns at 200 revolutions per minute and drives a gear with 10 teeth. At what speed does the second gear turn?
  25. What is the unit of electrical power?
  26. A force of 500 N acts on an area of 25 cm2. What is the pressure in N per cm2?
  27. A voltage of 60 V drives a current of 4 A. What is the resistance?
  28. A force of 90 N acts on an area of 15 cm2. What is the pressure in N per cm2?
  29. What happens to the volume of water when it freezes?
  30. Which material is a good electrical conductor?
  31. A constant force of 200 N moves an object 3 m in the direction of the force. How much work is done?
  32. A force of 800 N acts on an area of 20 cm2. What is the pressure in N per cm2?
  33. A voltage of 12 V drives a current of 0.5 A. What is the resistance?
  34. A screw turned clockwise normally moves ...
  35. Which simple machine is a ramp?
  36. Why are cables covered with plastic?
  37. A gear with 24 teeth turns at 400 revolutions per minute and drives a gear with 12 teeth. At what speed does the second gear turn?
  38. A constant force of 50 N moves an object 12 m in the direction of the force. How much work is done?
  39. A voltage of 230 V is applied to a resistor of 46 ohms. What current flows?
  40. A gear with 50 teeth turns at 300 revolutions per minute and drives a gear with 25 teeth. At what speed does the second gear turn?
  41. A lever is balanced. A force of 20 N acts at a distance of 60 cm from the pivot. What force acts at a distance of 15 cm on the other side?
  42. Which of the following is a renewable energy source?
  43. Which tool shows whether a surface is horizontal?
  44. A device runs on 230 V and draws 10 A. What is its power?
  45. A gear with 15 teeth turns at 900 revolutions per minute and drives a gear with 45 teeth. At what speed does the second gear turn?
  46. Which tool is used to measure a length precisely to tenths of a millimetre?
  47. A voltage of 230 V drives a current of 5 A. What is the resistance?
  48. A gear with 18 teeth turns at 1200 revolutions per minute and drives a gear with 54 teeth. At what speed does the second gear turn?
  49. A current of 1.5 A flows through a resistor of 8 ohms. What is the voltage across it?
  50. Which part of a car engine mixes air with fuel in older engines?
  51. A voltage of 24 V drives a current of 3 A. What is the resistance?
  52. A current of 3 A flows through a resistor of 20 ohms. What is the voltage across it?
  53. A gear with 20 teeth turns at 600 revolutions per minute and drives a gear with 40 teeth. At what speed does the second gear turn?
  54. A force of 1200 N acts on an area of 40 cm2. What is the pressure in N per cm2?
  55. A lever is balanced. A force of 15 N acts at a distance of 50 cm from the pivot. What force acts at a distance of 25 cm on the other side?
  56. A lever is balanced. A force of 50 N acts at a distance of 30 cm from the pivot. What force acts at a distance of 10 cm on the other side?

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