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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. Energy of motion






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






3. Distance between the fulcrum and the load






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






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






6. Force exerted on the lever to make it move






7. Mass of the object lifted by the lever






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. Science of designing machines to suit people






10. Is the work done by the machine






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






12. Bigger gear






13. Unit of measurement for pressure






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






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






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






18. Work unit






19. Hydraulic system in your body






20. 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)






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






22. F x d






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






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






25. Several simple machines all working together in a system






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






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






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






29. 1st class - 2nd class - 3rd class






30. The rate of motion that an object changes position






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






32. Reason that machines are never 100% efficient






33. 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






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






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






36. (driven gear) smaller gear






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






38. 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.






39. 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.






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






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






42. Do not seal the gas (usually air)






43. Act like levers






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






45. 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.






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






47. Distance between the fulcrum and the effort force






48. 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






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






50. F/A