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






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






3. Act like levers






4. Distance between the fulcrum and the effort force






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






6. F x d






7. Energy of motion






8. F/A






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






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






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






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






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






14. Do not seal the gas (usually air)






15. 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






16. Unit of measurement for pressure






17. 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.






18. Distance between the fulcrum and the load






19. 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






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






21. 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.






22. Do the work faster






23. 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)






24. Work unit






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






26. Pneumatic system in your body






27. Hydraulic system in your body






28. 1st class - 2nd class - 3rd class






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






30. Science of designing machines to suit people






31. Reason that machines are never 100% efficient






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






33. (driven gear) smaller gear






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






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






36. 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.






37. A fixed point






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






39. Bigger gear






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






41. Is the work done by the machine






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






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






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






45. Force exerted on the lever to make it move






46. Mass of the object lifted by the lever






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






48. 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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49. The rate of motion that an object changes position






50. Several simple machines all working together in a system