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






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






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






5. 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






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






7. Stored energy






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






9. (driven gear) smaller gear






10. Distance between the fulcrum and the effort force






11. Bigger gear






12. 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






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






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






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






16. Act like levers






17. 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.






18. Force exerted on the lever to make it move






19. F x d






20. A fixed point






21. 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)






22. Is the work done by the machine






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






24. 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






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






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






27. 1st class - 2nd class - 3rd class






28. F/A






29. Unit of measurement for pressure






30. Do the work faster






31. Hydraulic system in your body






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






33. Distance between the fulcrum and the load






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






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






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






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






39. 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.






40. Do the work easier






41. Work unit






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






43. Mass of the object lifted by the lever






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






45. Several simple machines all working together in a system






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






47. Energy of motion






48. 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.






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






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