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






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






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






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






5. A group of parts that work together to perform a function






6. Science of designing machines to suit people






7. Work unit






8. Several simple machines all working together in a system






9. 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)






10. Do the work faster






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






13. 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.






14. Distance between the fulcrum and the effort force






15. Used to apply force to the fluid - which creates pressure in the fluid






16. The rate of motion that an object changes position






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






18. When the driving and the driven gears are the same size






19. Do not seal the gas (usually air)






20. Stored energy






21. Is the work done by the machine






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






23. A fixed point






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






25. F/A






26. 1st class - 2nd class - 3rd class






27. Do the work easier






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






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






30. The combustion occurs inside the engine. The pistons goes through 4 steps: Intake stroke (taking in the fuel) - compression stroke (compressing the fuel- air mixture) - power stroke (the fuel- air mixture is ignited) - exhaust stroke (waste products






31. Reason that machines are never 100% efficient






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






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






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






35. 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.






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






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






38. Act like levers






39. (driven gear) smaller gear






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






41. Distance between the fulcrum and the load






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






43. Mass of the object lifted by the lever






44. F x d






45. Hydraulic system in your body






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






47. Within a machine are groups of parts that perform specific functions - such as braking or steering






48. The relationship between the speed of rotations of a smaller gear and a larger gear - can be calculated by dividing the number of driver gear teeth by the number of follower gear teeth.






49. 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






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