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. Distance between the fulcrum and the effort force






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






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






4. Do the work easier






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






6. 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






7. The rate of motion that an object changes position






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






9. Hydraulic system in your body






10. Is the work done by the machine






11. Do not seal the gas (usually air)






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






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






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






15. A fixed point






16. (driven gear) smaller gear






17. 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






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






19. Pneumatic system in your body






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






21. 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.






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






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






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






25. Bigger gear






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






27. Science of designing machines to suit people






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. 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.






30. Act like levers






31. 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)






32. Mass of the object lifted by the lever






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






34. 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.






35. Reason that machines are never 100% efficient






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






37. F/A






38. Do the work faster






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






40. Force exerted on the lever to make it move






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






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






43. Work unit






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






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






46. 1st class - 2nd class - 3rd class






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






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






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






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