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






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






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






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






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






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






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






9. Do the work easier






10. A fixed point






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






12. Work unit






13. Act like levers






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






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






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






17. Is the work done by the machine






18. Do the work faster






19. Reason that machines are never 100% efficient






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






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






22. Distance between the fulcrum and the effort force






23. F x d






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






25. Unit of measurement for pressure






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






27. 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.






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






29. Pneumatic system in your body






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






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






32. 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.






33. Mass of the object lifted by the lever






34. 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






35. 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






36. 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.






37. Force exerted on the lever to make it move






38. Distance between the fulcrum and the load






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






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






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






42. Science of designing machines to suit people






43. Bigger gear






44. Stored energy






45. (driven gear) smaller gear






46. 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)






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






48. 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






49. Energy of motion






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