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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 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)






2. Is the work done by the machine






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






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






5. 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.






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






7. Act like levers






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






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






10. The rate of motion that an object changes position






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






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






13. 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






14. F x d






15. (driven gear) smaller gear






16. Unit of measurement for pressure






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






18. 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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19. The fluid transfers the pressure from the input piston to the ____________






20. 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






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






22. Mass of the object lifted by the lever






23. Force exerted on the lever to make it move






24. Stored energy






25. Pneumatic system in your body






26. Do the work easier






27. Do the work faster






28. Do not seal the gas (usually air)






29. Distance between the fulcrum and the effort force






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






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






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






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






34. Energy of motion






35. 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.






36. Reason that machines are never 100% efficient






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






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






39. Several simple machines all working together in a system






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






41. 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.






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






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






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






45. 1st class - 2nd class - 3rd class






46. Hydraulic system in your body






47. Work unit






48. F/A






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






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