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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. The rate of motion that an object changes position






2. Do not seal the gas (usually air)






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






5. Act like levers






6. A fixed point






7. 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.






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






9. 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.






10. Work unit






11. Distance between the fulcrum and the effort force






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






13. Do the work easier






14. 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.






15. Several simple machines all working together in a system






16. 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)






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






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


19. Science of designing machines to suit people






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






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






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






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






24. F/A






25. F x d






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






27. Hydraulic system in your body






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






29. 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






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






31. Is the work done by the machine






32. Energy of motion






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






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






35. Reason that machines are never 100% efficient






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






37. 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






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






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






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






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






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






43. Bigger gear






44. 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






45. Do the work faster






46. (driven gear) smaller gear






47. Distance between the fulcrum and the load






48. 1st class - 2nd class - 3rd class






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






50. Stored energy






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