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






2. 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.






3. 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)






4. Mass of the object lifted by the lever






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






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






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






8. Distance between the fulcrum and the load






9. Distance between the fulcrum and the effort force






10. F x d






11. Act like levers






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






13. Bigger gear






14. Do the work faster






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






16. The rate of motion that an object changes position






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






18. 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.






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






20. Force exerted on the lever to make it move






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






22. Stored energy






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. Energy of motion






25. 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.






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






27. A fixed point






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






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






30. Is the work done by the machine






31. 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






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






33. Do not seal the gas (usually air)






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






35. Science of designing machines to suit people






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






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






38. F/A






39. Work unit






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






41. (driven gear) smaller gear






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






43. Pneumatic system in your body






44. Do the work easier






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






46. 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






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






48. 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






49. Several simple machines all working together in a system






50. Reason that machines are never 100% efficient