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






2. 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






3. Do the work easier






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






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






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






8. Bigger gear






9. Hydraulic system in your body






10. Mass of the object lifted by the lever






11. Is the work done by the machine






12. Unit of measurement for pressure






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






14. F x d






15. 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.






16. Several simple machines all working together in a system






17. Distance between the fulcrum and the effort force






18. A fixed point






19. Distance between the fulcrum and the load






20. Science of designing machines to suit people






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






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






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






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






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






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






27. 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)






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






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






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






31. 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.






32. Pneumatic system in your body






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






36. Work unit






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






38. Reason that machines are never 100% efficient






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






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






41. 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.






42. Act like levers






43. Do not seal the gas (usually air)






44. The rate of motion that an object changes position






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






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






47. 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






48. Energy of motion






49. Stored energy






50. Force exerted on the lever to make it move