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






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






3. (driven gear) smaller gear






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






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






6. A fixed point






7. Do not seal the gas (usually air)






8. Do the work easier






9. Stored energy






10. Is the work done by the machine






11. 1st class - 2nd class - 3rd class






12. Several simple machines all working together in a system






13. 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.






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






15. 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.






16. F/A






17. 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






18. Reason that machines are never 100% efficient






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






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






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






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






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






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






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






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






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






28. Energy of motion






29. Do the work faster






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






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






32. 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)






33. Bigger gear






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






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






36. Distance between the fulcrum and the load






37. 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






38. The rate of motion that an object changes position






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






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






41. Science of designing machines to suit people






42. Distance between the fulcrum and the effort force






43. F x d






44. 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.






45. Force exerted on the lever to make it move






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






47. Act like levers






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






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






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