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






2. The rate of motion that an object changes position






3. Act like levers






4. F x d






5. Distance between the fulcrum and the effort force






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






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






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






9. 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






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






11. Unit of measurement for pressure






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






13. Science of designing machines to suit people






14. 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)






15. 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.






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






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






18. A fixed point






19. Several simple machines all working together in a system






20. 1st class - 2nd class - 3rd class






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






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






23. Do the work easier






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






25. (driven gear) smaller gear






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






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






28. Hydraulic system in your body






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






30. Distance between the fulcrum and the load






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






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






33. Reason that machines are never 100% efficient






34. F/A






35. Force exerted on the lever to make it move






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






37. Bigger gear






38. Energy of motion






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






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






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






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






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






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






46. Work unit






47. Mass of the object lifted by the lever






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






49. Pneumatic system in your body






50. 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