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Mechanical Engineering

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. If a force causes rotations -Vector- Machines can have more than one torque-Units: foot- pound and newton - meter - i.e. engines - airplanes - propeller

2. Dimensions and units

3. When the moving fluid is a gas

4. Liquid or gas

5. Length x Width

6. A pull on an object

7. The standard system of units that uses base 10 and used in the rest of the world. US does not use - but Great Britain does - Base Units: mass - kilograms (kg) - length- meters (m) - and time-Seconds (S) - Force is a derived unit measured in newtons (

8. Piston travels up and exhaust valve opens. Combustion by product exhaustion

9. Mechanics is an application of math that describes how forces affect a body

10. Used to measure or quantify -US Common: Absolute and Gravitational -SI: absolute

11. A fluid power system uses hydraulics and a fluid under pressure to create a greater force than is applied

12. When the fluid is in motion

13. The magnitude of something in a particular direction

14. Body in motion (car)

15. Length / Time

16. Both engines drive wheels -ICE used for cruising -Electric motor assists with low speed for acceleration and hill climbing

17. A^2+b^2=c^2 - used to calculate vectors

18. A quantity that has both magnitude and direction when placed within a coordinate system -Forces and Velocity i.e. driving 50 miles to the northeast

19. Are independent of other dimensions - They are limited in number - length - mass - time - temperature - force

20. Varies by location (on earth) - distance (from earth) - and mass (of planet)

21. Can be applied at a time on an object

22. Static - Dynamic

23. ICE generates electricity for electric battery -Electric motor turns wheels

24. When the sum of all forces and the sum of all moments both equal forces - No movement

25. Compression-Tension-Shear

26. A system adopted from an old British system of units in the 13th century -Engineering system -Units: length- foot (ft) - time- second (s) - force-(lbs) - Mass is a derived unit called a slug -Political/Economic choice -Awkward

27. Movement along a line (reciprocal or linear motion) -Units: feet and meters

28. When the work done by the effort just equals the work done by the load - ______ of the machine will occur

29. Intake of fuel and air mixture - compression of mixture by piston

30. Energy may enter or leave. No mass enters or leaves the system i.e. Closed water bottle - car engine - human

31. Result of gravity acting on mass -The greater the mass - the greater the weight -Is a force -Units: lbs - N

32. Used in cars -2 rotations of crankshaft -4 strokes (down - up - down - up) of piston - i.e. cars - trucks - planes - buses - motorcycles - submarine -1% of gas actually moves people

33. A movement around a central pivot point (rotational movement) -Units: revolutions per second (rps) and revolutions per minute (rpm)

34. Derived from - or composed of - base dimensions i.e. Area (length x width) - Weight (mass x acceleration) - velocity (length/time)

35. Allows comparison between different measuring systems and units - Necessary to market internationally

36. Body at rest or is in equilibrium (wall)

37. Piston travels up and both plugs are closed

38. If the force needed to operate the machine (input force) is less than the force being opposed or the load being moved (output force) -The ratio of the output force divided by the input force -If the number is greater than one - there is a mechanical

39. A change in velocity over time -Unites: USA- ft/s^2 and SI: m/s^2

40. The designing of machines that contribute to society and our quality of life - Mechanical engineers apply the principles of mathematics - chemistry - and physics to solve real- world problems

41. Old technology- harder to service-Still used on big trucks and trailers because they are too expensive to convert

42. Psi - newtons - pascals

43. Force/Area

44. (Force)(Distance)/Seconds

45. Causes acceleration -Units: USA: 32.2 ft/s^2 SI: 9.8 m/sec^2

46. What we are studying

47. Three- dimensional property measured in units of length times length times length =length x width x height

48. ...

49. Mass x acceleration

50. Exhaust