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






2. Energy of motion






3. Pneumatic system in your body






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






5. 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.






6. The rate of motion that an object changes position






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






8. Is the work done by the machine






9. F x d






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






11. Do not seal the gas (usually air)






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






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






14. Distance between the fulcrum and the load






15. Several simple machines all working together in a system






16. 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.






17. 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






18. Distance between the fulcrum and the effort force






19. 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






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






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






22. 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.






23. Hydraulic system in your body






24. 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






25. Act like levers






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






27. F/A






28. A fixed point






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


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






31. 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)






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






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






34. Mass of the object lifted by the lever






35. Work unit






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






37. (driven gear) smaller gear






38. Science of designing machines to suit people






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






40. Reason that machines are never 100% efficient






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






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






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






44. Bigger gear






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






46. Force exerted on the lever to make it move






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






48. Do the work easier






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






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