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

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

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

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

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

6. Mass of the object lifted by the lever

7. Do the work faster

8. 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)

9. Several simple machines all working together in a system

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

11. 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

12. 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.

13. Science of designing machines to suit people

14. Pneumatic system in your body

15. 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.

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

17. (driven gear) smaller gear

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

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

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

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

22. Is the work done by the machine

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

24. Distance between the fulcrum and the effort force

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

26. Do the work easier

27. 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.

28. Hydraulic system in your body

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

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

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

32. 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

33. A fixed point

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

35. Do not seal the gas (usually air)

36. F/A

37. Work unit

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

39. Unit of measurement for pressure

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

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

42. The rate of motion that an object changes position

43. Reason that machines are never 100% efficient

44. F x d

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

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

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

48. 1st class - 2nd class - 3rd class

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

50. Stored energy