Test your basic knowledge |

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. 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






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






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






4. Do the work easier






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






6. Distance between the fulcrum and the load






7. Distance between the fulcrum and the effort force






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






9. F/A






10. 1st class - 2nd class - 3rd class






11. 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.






12. Stored energy






13. Act like levers






14. 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)






15. 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.






16. A fixed point






17. Do the work faster






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






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






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






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






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






23. Energy of motion






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






25. Bigger gear






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






27. 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.






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






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






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






31. F x d






32. 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






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






34. Science of designing machines to suit people






35. The rate of motion that an object changes position






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






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. Pneumatic system in your body






39. (driven gear) smaller gear






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






41. Work unit






42. Mass of the object lifted by the lever






43. Do not seal the gas (usually air)






44. Reason that machines are never 100% efficient






45. Several simple machines all working together in a system






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






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






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






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






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