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. Do the work easier






2. F/A






3. Act like levers






4. Reason that machines are never 100% efficient






5. 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)






6. 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.






7. Is the work done by the machine






8. Do not seal the gas (usually air)






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






10. F x d






11. Stored energy






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






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






14. Pneumatic system in your body






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






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






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






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






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






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






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. Several simple machines all working together in a system






23. Energy of motion






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






25. 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.






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






27. 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






28. Hydraulic system in your body






29. A fixed point






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






31. Pressure applied to an enclosed fluid is transmitted undiminished in all directions throughout the fluid and perpendicular to the walls of the container.


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






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






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






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






36. (driven gear) smaller gear






37. Distance between the fulcrum and the load






38. The rate of motion that an object changes position






39. Bigger gear






40. Science of designing machines to suit people






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






42. Mass of the object lifted by the lever






43. Distance between the fulcrum and the effort force






44. Unit of measurement for pressure






45. 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.






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






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






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






49. Force exerted on the lever to make it move






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