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. The rate of motion that an object changes position






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






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






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






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






6. Mass of the object lifted by the lever






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






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






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






10. Science of designing machines to suit people






11. 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






12. Do the work easier






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






14. 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.






15. F x d






16. Hydraulic system in your body






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






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






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






20. Force exerted on the lever to make it move






21. Stored energy






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






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






24. 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.






25. F/A






26. Do not seal the gas (usually air)






27. Energy of motion






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






29. Act like levers






30. 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.






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






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






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






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






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






36. Several simple machines all working together in a system






37. Is the work done by the machine






38. Distance between the fulcrum and the load






39. A fixed point






40. 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






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






42. 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






43. Pneumatic system in your body






44. Reason that machines are never 100% efficient






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






46. (driven gear) smaller gear






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






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






49. Bigger gear






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