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






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






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






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






5. 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.






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






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






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






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






10. 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






11. Do not seal the gas (usually air)






12. Science of designing machines to suit people






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






14. 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)






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






16. 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.






17. The rate of motion that an object changes position






18. Distance between the fulcrum and the effort force






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






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






21. A fixed point






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






23. Energy of motion






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






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






26. F/A






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






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


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






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






31. Unit of measurement for pressure






32. Work unit






33. Do the work faster






34. 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






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






36. Reason that machines are never 100% efficient






37. Stored energy






38. Do the work easier






39. Hydraulic system in your body






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






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






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






43. Act like levers






44. Is the work done by the machine






45. F x d






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






47. Distance between the fulcrum and the load






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. (driven gear) smaller gear






50. Force exerted on the lever to make it move