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






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






3. Bigger gear






4. The rate of motion that an object changes position






5. Reason that machines are never 100% efficient






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






7. 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






8. F x d






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






10. A fixed point






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






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






13. Science of designing machines to suit people






14. Is the work done by the machine






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






16. Force exerted on the lever to make it move






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






19. 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.






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






21. Distance between the fulcrum and the load






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






23. Unit of measurement for pressure






24. Energy of motion






25. Stored energy






26. Work unit






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






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






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






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






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






32. 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






33. Do not seal the gas (usually air)






34. Mass of the object lifted by the lever






35. 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






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






37. (driven gear) smaller gear






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






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






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






41. Distance between the fulcrum and the effort force






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






43. Do the work faster






44. 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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45. Several simple machines all working together in a system






46. 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.






47. Pneumatic system in your body






48. Do the work easier






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






50. F/A