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Mechanical Systems

Subject : engineering
  • Answer 50 questions in 15 minutes.
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  • Match each statement with the correct term.
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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 fluid transfers the pressure from the input piston to the ____________

3. Stored energy

4. Pneumatic system in your body

5. Bigger gear

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

8. Distance between the fulcrum and the load

9. Mass of the object lifted by the lever

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

11. Is the work done by the machine

12. 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

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

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

15. The rate of motion that an object changes position

16. Do the work faster

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

18. A fixed point

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

20. Hydraulic system in your body

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

22. Act like levers

23. 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)

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

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

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

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

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

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

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

31. Reason that machines are never 100% efficient

32. Force exerted on the lever to make it move

33. F x d

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

35. 1st class - 2nd class - 3rd class

36. Unit of measurement for pressure

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

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

39. Science of designing machines to suit people

40. Work unit

41. 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

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

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

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

45. F/A

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

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

48. Do the work easier

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

50. 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.