Test your basic knowledge |

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. Act like levers






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






3. 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.






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






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






6. Distance between the fulcrum and the load






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






8. Do the work easier






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






10. Unit of measurement for pressure






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






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






13. Work unit






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






15. Pneumatic system in your body






16. 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)






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






18. 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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19. The rate of motion that an object changes position






20. 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






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






22. 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






23. Reason that machines are never 100% efficient






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






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






26. 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






27. F/A






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






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






30. 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.






31. 1st class - 2nd class - 3rd class






32. Bigger gear






33. Do not seal the gas (usually air)






34. Energy of motion






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






36. (driven gear) smaller gear






37. Is the work done by the machine






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






39. Hydraulic system in your body






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






41. 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.






42. Science of designing machines to suit people






43. Do the work faster






44. Force exerted on the lever to make it move






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






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






47. Stored energy






48. Mass of the object lifted by the lever






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






50. Distance between the fulcrum and the effort force