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. Several simple machines all working together in a system






2. Bigger gear






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






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






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






6. The rate of motion that an object changes position






7. Unit of measurement for pressure






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






9. 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)






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






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






12. (driven gear) smaller gear






13. A fixed point






14. Science of designing machines to suit people






15. Force exerted on the lever to make it move






16. 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.






17. Reason that machines are never 100% efficient






18. Energy of motion






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






20. Is the work done by the machine






21. Distance between the fulcrum and the effort force






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






23. 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






24. F/A






25. Mass of the object lifted by the lever






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






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






28. 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






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






30. Do not seal the gas (usually air)






31. Do the work faster






32. Stored energy






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






34. Hydraulic system in your body






35. Distance between the fulcrum and the load






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






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






38. Do the work easier






39. Pneumatic system in your body






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






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






42. 1st class - 2nd class - 3rd class






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






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






45. Act like levers






46. 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.






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






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






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






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