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 easier






3. Reason that machines are never 100% efficient






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






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






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






8. A fixed point






9. The rate of motion that an object changes position






10. Distance between the fulcrum and the load






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






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






13. 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.






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. Do the work faster






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

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






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






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






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






21. 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.






22. 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






23. Is the work done by the machine






24. Mass of the object lifted by the lever






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






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






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






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






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






30. 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






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






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






33. Energy of motion






34. Hydraulic system in your body






35. Work unit






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






37. Act like levers






38. Stored energy






39. F x d






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






41. Bigger gear






42. (driven gear) smaller gear






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






44. Distance between the fulcrum and the effort force






45. Several simple machines all working together in a system






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






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






48. Force exerted on the lever to make it move






49. 1st class - 2nd class - 3rd class






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