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. Science of designing machines to suit people






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






3. Force exerted on the lever to make it move






4. Is the work done by the machine






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






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






7. Pneumatic system in your body






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






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






10. 1st class - 2nd class - 3rd class






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






12. Stored energy






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


14. Do the work faster






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






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






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






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






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






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






21. 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






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






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






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






25. Act like levers






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






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






28. 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






29. F/A






30. Do not seal the gas (usually air)






31. Unit of measurement for pressure






32. 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.






33. (driven gear) smaller gear






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






35. 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.






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






37. Distance between the fulcrum and the effort force






38. Energy of motion






39. Mass of the object lifted by the lever






40. Distance between the fulcrum and the load






41. 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.






42. F x d






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






44. Do the work easier






45. Reason that machines are never 100% efficient






46. The rate of motion that an object changes position






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






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






49. 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)






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