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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. Do the work faster






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






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






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






5. Distance between the fulcrum and the effort force






6. The rate of motion that an object changes position






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. 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.






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






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






11. Pneumatic system in your body






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






13. Energy of motion






14. Distance between the fulcrum and the load






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






16. (driven gear) smaller gear






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






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






19. Unit of measurement for pressure






20. F/A






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






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






23. A fixed point






24. Do not seal the gas (usually air)






25. 1st class - 2nd class - 3rd class






26. Bigger gear






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






28. 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






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






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


31. Several simple machines all working together in a system






32. Force exerted on the lever to make it move






33. Act like levers






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






35. Mass of the object lifted by the lever






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






37. Work unit






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






39. Hydraulic system in your body






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






41. F x d






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






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






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






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






46. 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)






47. 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.






48. Stored energy






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






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