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






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. 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






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






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






7. A fixed point






8. The rate of motion that an object changes position






9. F/A






10. Stored energy






11. Do the work easier






12. Reason that machines are never 100% efficient






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






14. Mass of the object lifted by the lever






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






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






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






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






19. Bigger gear






20. Energy of motion






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






22. Do not seal the gas (usually air)






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






24. Is the work done by the machine






25. Science of designing machines to suit people






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






27. Hydraulic system in your body






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






29. 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)






30. 1st class - 2nd class - 3rd class






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






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






33. 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.






34. Do the work faster






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






36. Unit of measurement for pressure






37. Work unit






38. 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






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


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






41. Pneumatic system in your body






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






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






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






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






46. 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






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






48. Act like levers






49. (driven gear) smaller gear






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