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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 rigid bar or plank that can rotate around a fixed point






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






3. Unit of measurement for pressure






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






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






6. 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)






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






8. 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.






9. Energy of motion






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






11. 1st class - 2nd class - 3rd class






12. 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.






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






14. (driven gear) smaller gear






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






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






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






18. 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.






19. Distance between the fulcrum and the load






20. Is the work done by the machine






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






22. Several simple machines all working together in a system






23. Stored energy






24. Force exerted on the lever to make it move






25. The rate of motion that an object changes position






26. F x d






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






28. Science of designing machines to suit people






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






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






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






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






33. F/A






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






35. Bigger gear






36. Act like levers






37. 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






38. 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






39. Mass of the object lifted by the lever






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. Do the work faster






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






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






44. A fixed point






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






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






47. Reason that machines are never 100% efficient






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






49. Work unit






50. Do the work easier