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






2. F x d






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






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






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






6. Act like levers






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






8. Stored energy






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






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






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






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






13. Do the work easier






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






15. 1st class - 2nd class - 3rd class






16. Work unit






17. Distance between the fulcrum and the effort force






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






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






20. 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)






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






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






23. Unit of measurement for pressure






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






25. 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






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






27. 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.






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






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. The rate of motion that an object changes position






31. 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






32. A fixed point






33. Do the work faster






34. Pneumatic system in your body






35. Distance between the fulcrum and the load






36. Science of designing machines to suit people






37. Do not seal the gas (usually air)






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






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






40. Mass of the object lifted by the lever






41. Force exerted on the lever to make it move






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






43. (driven gear) smaller gear






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






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






46. Is the work done by the machine






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






48. 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






49. Energy of motion






50. 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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Can you answer 50 questions in 15 minutes?


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