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Mechanical Systems

Subject : engineering
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Hydraulic system in your body






2. A pair of wheels that have teeth that interlink. When they rotate together - one gear wheel transfers turning motion and force to the other.






3. A combination of two wheels of different diameters that turn together - a lever that rotates in a circle around a center point or fulcrum.






4. A small gear driving a larger gear increases torque and reduces speed in the driven gear






5. A large gear driving a smaller gear decreases torque and increases speed in the driven gear






6. Science of designing machines to suit people






7. Energy is transferred from one place to another - and no energy is changed or converted.






8. Do the work easier






9. Is the work needed to use - or operate the machine






10. A measure of the amount of force applied to a given area






11. Load Force (FL)/Effort Force (FE)






12. Are used to overcome the frictional force of the machine






13. Distance between the fulcrum and the load






14. Force of the small piston/area of the small piston = Force of the large piston/Area of the large piston






15. Act like levers






16. The fluid transfers the pressure from the input piston to the ____________






17. Do the work faster






18. Reason that machines are never 100% efficient






19. Pneumatic system in your body






20. Several simple machines all working together in a system






21. Energy of motion






22. Distance between the fulcrum and the effort force






23. F/A






24. To increase the force on the output piston - the input piston must move through a greater distance






25. Required a large shift in population from rural areas to the cities.






26. Work done by machine / work done to make the machine operate x100






27. The ratio of the output to the input of any system - a comparison of the useful work provided by a machine or a system with - the work supplied to the machine or system






28. Or ramp - makes it easier to move a load higher than it is - but - it has to be moved over a much longer distance.






29. Do not seal the gas (usually air)






30. F x d






31. Is done when a force acts on an object to make that object move - a transfer of energy






32. Heated water to make steam and then used to move a piston. When the piston moved - it caused an attached rod (which was connected to a crankshaft) to move as well - making the engine work.






33. Transferred to kinetic energy in machines in a dam to generate electrical energy






34. Heated water to make steam and then used to move a piston in a circular motion






35. Consists of a wire - rope - or cable moving on a grooved wheel. One or more combinations of wheels and ropes can be fixed in place or moveable - help you lift larger loads.






36. Used to control the flow of a fluid. It is a moveable part that controls the flow by opening or closing






37. Pressure applied to an enclosed fluid is transmitted undiminished in all directions throughout the fluid and perpendicular to the walls of the container.

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38. A very complex combination of pulleys - including fixed and movable is called






39. (driven gear) smaller gear






40. Stored energy






41. The comparison of the force produced by a machine to the force applied to the machine. (the size of the load vs the size of the force needed to move the load)






42. A rigid bar or plank that can rotate around a fixed point






43. Work unit






44. The production of large quantities of a standardized article (often using assembly line techniques)






45. Consists of a small cylinder that has a crank or handle. The axle of the winch acts like the fulcrum - the handle is the effort arm






46. 1st class - 2nd class - 3rd class






47. Mass of the object lifted by the lever






48. Is the work done by the machine






49. Bigger gear






50. Use the force of a liquid in a confined space - apply two essential characteristic of fluids - their incompressibility and their ability to transmit pressure






Can you answer 50 questions in 15 minutes?



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