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. Mass of the object lifted by the lever






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






3. Pneumatic system in your body






4. Unit of measurement for pressure






5. Is the work done by the machine






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






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






8. Force exerted on the lever to make it move






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






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






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






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






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






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






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






16. 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.






17. Several simple machines all working together in a system






18. Bigger gear






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






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






21. Work unit






22. 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)






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






24. 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






25. A fixed point






26. Do not seal the gas (usually air)






27. The rate of motion that an object changes position






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






29. Pressure applied to an enclosed fluid is transmitted undiminished in all directions throughout the fluid and perpendicular to the walls of the container.


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






31. Do the work easier






32. Distance between the fulcrum and the load






33. 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






34. Do the work faster






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






36. F/A






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






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






39. Reason that machines are never 100% efficient






40. 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.






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






42. Act like levers






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






44. F x d






45. (driven gear) smaller gear






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






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






48. 1st class - 2nd class - 3rd class






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






50. Hydraulic system in your body