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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. Several simple machines all working together in a system






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






3. Unit of measurement for pressure






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






5. 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






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






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






8. F x d






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






10. Mass of the object lifted by the lever






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






12. 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)






13. 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.






14. 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






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






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






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






18. Act like levers






19. A fixed point






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






21. Science of designing machines to suit people






22. Distance between the fulcrum and the load






23. Energy of motion






24. (driven gear) smaller gear






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






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






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






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






29. Force exerted on the lever to make it move






30. Work unit






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






32. The rate of motion that an object changes position






33. Stored energy






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






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






36. Do the work easier






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






38. Bigger gear






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






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






41. 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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42. 1st class - 2nd class - 3rd class






43. Hydraulic system in your body






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






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






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






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






48. 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.






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






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