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






2. Is the work done by the machine






3. Force exerted on the lever to make it move






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






5. Work unit






6. (driven gear) smaller gear






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






8. Do the work faster






9. Science of designing machines to suit people






10. F/A






11. Distance between the fulcrum and the effort force






12. Hydraulic system in your body






13. Energy of motion






14. Mass of the object lifted by the lever






15. F x d






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






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






18. 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






19. 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






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






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






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






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






24. Stored energy






25. Unit of measurement for pressure






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






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






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






29. Several simple machines all working together in a system






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






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






32. 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






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






34. Do not seal the gas (usually air)






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






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






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






38. Distance between the fulcrum and the load






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






40. A fixed point






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






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






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






44. The rate of motion that an object changes position






45. 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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46. Reason that machines are never 100% efficient






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






48. 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.






49. Act like levers






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