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






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






3. F x d






4. Distance between the fulcrum and the effort force






5. Reason that machines are never 100% efficient






6. 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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7. 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)






8. Force exerted on the lever to make it move






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






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






11. Energy of motion






12. 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






13. Mass of the object lifted by the lever






14. 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






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






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






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






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






19. Do the work faster






20. Distance between the fulcrum and the load






21. Unit of measurement for pressure






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






23. (driven gear) smaller gear






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






25. Several simple machines all working together in a system






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






27. Stored energy






28. A fixed point






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






30. Work unit






31. Science of designing machines to suit people






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






33. 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






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






35. Pneumatic system in your body






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






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






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






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






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






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






42. F/A






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






44. 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.






45. Do not seal the gas (usually air)






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






47. Do the work easier






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






49. The rate of motion that an object changes position






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