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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.
  • 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. Do not seal the gas (usually air)

2. Do the work faster

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

4. Work unit

5. Distance between the fulcrum and the load

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

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

8. (driven gear) smaller gear

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

10. Is the work done by the machine

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

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. 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

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

15. Do the work easier

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

17. Act like levers

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

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

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

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

22. 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.

23. Stored energy

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

25. 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

26. 1st class - 2nd class - 3rd class

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

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

29. Mass of the object lifted by the lever

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

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

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. F x d

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

36. Pneumatic system in your body

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

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

39. Distance between the fulcrum and the effort force

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

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

42. Unit of measurement for pressure

43. A fixed point

44. Several simple machines all working together in a system

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

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

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

48. Bigger gear

49. Energy of motion

50. Hydraulic system in your body