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






2. Is the work done by the machine






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






4. 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






5. F/A






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






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






8. A fixed point






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






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






11. Do not seal the gas (usually air)






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






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






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






15. Hydraulic system in your body






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






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






18. 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






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






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






21. 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.






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






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






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






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






26. Act like levers






27. (driven gear) smaller gear






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






29. 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






30. Mass of the object lifted by the lever






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






32. Work unit






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






34. Several simple machines all working together in a system






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






37. F x d






38. Do the work easier






39. Science of designing machines to suit people






40. 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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41. 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.






42. Stored energy






43. Unit of measurement for pressure






44. Energy of motion






45. 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)






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






47. Do the work faster






48. Distance between the fulcrum and the load






49. Bigger gear






50. 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.