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 not seal the gas (usually air)






2. Do the work faster






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






4. Work unit






5. Distance between the fulcrum and the load






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






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






8. (driven gear) smaller gear






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






10. Is the work done by the machine






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






12. 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.






13. 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






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






15. Do the work easier






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






17. Act like levers






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






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






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






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






22. 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.






23. Stored energy






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






25. 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






26. 1st class - 2nd class - 3rd class






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






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






29. Mass of the object lifted by the lever






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






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






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






34. F x d






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






36. Pneumatic system in your body






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






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






39. Distance between the fulcrum and the effort force






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






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






42. Unit of measurement for pressure






43. A fixed point






44. Several simple machines all working together in a system






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






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






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






48. Bigger gear






49. Energy of motion






50. Hydraulic system in your body