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






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






3. 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






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






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






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






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






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






10. A fixed point






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






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






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






14. Hydraulic system in your body






15. F x d






16. 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.






17. Several simple machines all working together in a system






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






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






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






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






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






24. Do the work easier






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






26. Unit of measurement for pressure






27. Force exerted on the lever to make it move






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






29. 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.






30. Is the work done by the machine






31. Distance between the fulcrum and the effort force






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






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






34. Stored energy






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






36. (driven gear) smaller gear






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






38. Bigger gear






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






40. Work unit






41. Mass of the object lifted by the lever






42. Distance between the fulcrum and the load






43. F/A






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






45. 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






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






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






48. Act like levers






49. Do not seal the gas (usually air)






50. Energy of motion