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. Force exerted on the lever to make it move






2. Hydraulic system in your body






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






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






6. Pneumatic system in your body






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






8. F/A






9. Do not seal the gas (usually air)






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






11. A fixed point






12. Act like levers






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






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






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






18. Work unit






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






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






21. 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






22. Mass of the object lifted by the lever






23. Do the work faster






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






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






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






27. 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






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






29. (driven gear) smaller gear






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






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






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






34. 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.






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






36. Energy of motion






37. Bigger gear






38. The rate of motion that an object changes position






39. Distance between the fulcrum and the load






40. Is the work done by the machine






41. Distance between the fulcrum and the effort force






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






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






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






45. F x d






46. Stored energy






47. Unit of measurement for pressure






48. Science of designing machines to suit people






49. Do the work easier






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