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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 easier






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






3. Unit of measurement for pressure






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






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






6. Force exerted on the lever to make it move






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






8. 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






9. Distance between the fulcrum and the effort force






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






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






12. 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.






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






14. F x d






15. A fixed point






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






17. 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






18. Several simple machines all working together in a system






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






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






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






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






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






25. Work unit






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






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






28. 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






29. Act like levers






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






31. Science of designing machines to suit people






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






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






34. Reason that machines are never 100% efficient






35. Is the work done by the machine






36. Stored energy






37. 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.






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






39. 1st class - 2nd class - 3rd class






40. Pneumatic system in your body






41. Do the work faster






42. The rate of motion that an object changes position






43. Hydraulic system in your body






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






45. (driven gear) smaller gear






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. Mass of the object lifted by the lever






48. Distance between the fulcrum and the load






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