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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. Work unit






2. 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)






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






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






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






8. Science of designing machines to suit people






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






10. Distance between the fulcrum and the effort force






11. Do not seal the gas (usually air)






12. Do the work faster






13. Is the work done by the machine






14. Force exerted on the lever to make it move






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






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






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






19. Reason that machines are never 100% efficient






20. 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.






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






22. F x d






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






24. Stored energy






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






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






27. Unit of measurement for pressure






28. Bigger gear






29. Pneumatic system in your body






30. Mass of the object lifted by the lever






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






32. F/A






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






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






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






36. 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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37. Force of the small piston/area of the small piston = Force of the large piston/Area of the large piston






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






39. (driven gear) smaller gear






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






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






42. Energy of motion






43. 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






44. Do the work easier






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






46. 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.






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






48. A fixed point






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






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