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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. F/A






2. F x d






3. (driven gear) smaller gear






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






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






6. Work unit






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






8. Stored energy






9. 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






10. Act like levers






11. Is the work done by the machine






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






13. Unit of measurement for pressure






14. 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)






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






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






17. 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.






18. A fixed point






19. Energy of motion






20. Reason that machines are never 100% efficient






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






22. 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






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






24. Distance between the fulcrum and the load






25. Several simple machines all working together in a system






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






27. 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.






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






29. The rate of motion that an object changes position






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






31. Mass of the object lifted by the lever






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






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






34. Distance between the fulcrum and the effort force






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






36. Do the work faster






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






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






39. Bigger gear






40. Force exerted on the lever to make it move






41. Hydraulic system in your body






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






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






44. Do the work easier






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






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






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






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






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







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Can you answer 50 questions in 15 minutes?


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