Test your basic knowledge |

Mechanical Engineering

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. Four Stroke Engine -Used in hotter areas because more efficient -Higher compression ratio than gasoline






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






3. Describes how applied forces bring a body into motion






4. Two stroke- Four Stroke- Diesel-Rotary -Hybrid






5. A^2+b^2=c^2






6. A small piece that makes up a larger whole. Each component is there for a specific job - but the sum of components






7. 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






8. When the fluid is in motion






9. The magnitude of something in a particular direction






10. What we are studying






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






12. Dimensions and units






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






14. The force simple machines use to do work on a single load or against a single force






15. Applied at an angle or parallel to a surface






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






17. Force and mass are proportional to each other (F=ma) -If F increases - so does acceleration -Force causes acceleration - More force means more acceleration - same mass - More mass means less acceleration - same force

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18. 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 (






19. (pi) x (radius)^2






20. Length / Time






21. Modern Technology- More efficient-Better Cooling-Easier to service- longer life - lither weight- More expensive






22. Can be applied:-By direct contact: push - pull - twist -At a distance: gravity - magnetism Can change: speed - direction - shape - units of force






23. 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






24. A flat - two dimensional property -Units of length multiplied by length describe area -A=length x width






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






26. Friction changes KE to heat energy- Heat is transferred to air- Front brakes work harder than rear- Some brakes use asbestos- Newer cars have dual braking systems - Don't drive through water or your brakes won't work well (ride breaks to dry them out






27. Work/force or vertical distance/sloping distance






28. Mass can neither by created nor destroyed - only transformed






29. Exhaust






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






31. Describes how applied forces bring a body into rest or equilibrium






32. Rotation will not occur - but translation might occur






33. Mass x acceleration






34. More compact (size of beer keg) - No valves -Benefits: fewer parts - lower engine weight Problems: seal - lower inertia forces -1 rotar=3 to 4 pistons






35. A pull on an object






36. A combination of components






37. Air is drawn in






38. Length x Width x Height






39. Combustion of fuel mixture ignited by spark plug






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






41. Fuel is injected and combusts due to temperature of compressed air






42. Piston travels up and both plugs are closed






43. Rotation may occur






44. Energy may enter or leave. Mass can enter or leave the system i.e. open water bottle - molecule - hydraulic cylinder - human






45. Translation (slide) -Rotate -Slide and Rotate Together






46. When the moving fluid is a gas






47. Force x Distance






48. Weight/Time






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






50. The perpendicular distance from the pivot point to the point of application of the force (d) - M=Fd -Clockwise=Negative moment -Counterclockwise=Positive moment