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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. Distance between the fulcrum and the load






2. 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.






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






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






5. Energy of motion






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






7. Science of designing machines to suit people






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






9. Bigger gear






10. Do not seal the gas (usually air)






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






12. (driven gear) smaller gear






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






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






15. Several simple machines all working together in a system






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






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






18. Distance between the fulcrum and the effort force






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


20. Do the work easier






21. Hydraulic system in your body






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






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






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






25. Act like levers






26. Is the work done by the machine






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






28. Work unit






29. Unit of measurement for pressure






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






31. Pneumatic system in your body






32. 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.






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






34. 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






35. 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






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. Are used to overcome the frictional force of the machine






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






39. Reason that machines are never 100% efficient






40. The rate of motion that an object changes position






41. Force exerted on the lever to make it move






42. 1st class - 2nd class - 3rd class






43. Stored energy






44. F x d






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






46. Mass of the object lifted by the lever






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






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






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






50. F/A