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. Same pressure - work - volume - Different forces and distances






2. An indication of kinetic energy of mass at the molecular level






3. Length x Width






4. The magnitude of something in a particular direction






5. One that pushes on an object






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






7. Can be applied at a time on an object






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






9. Compression-Tension-Shear






10. When the work done by the effort exceeds the work done by the load - the load...






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






12. 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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13. Length / Time






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






15. Combustion ignited by spark plug and materials are compressed






16. In a hydraulic with an incompressible fluid - the total pressure at any point in the system is the same - liquid

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






18. (Force)(Distance)/Seconds






19. Weight/Time






20. ...






21. When fluid is at rest






22. 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






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






24. When the moving fluid is a gas






25. Force x Distance






26. What we are studying






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






28. The amount of atoms and molecules in something - Matter is energy that has become solid -An object gains mass when it gains more energy and vice a versa -Units: SI- kgs and USA: Slugs - lbs






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






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






31. Every object continues in motion in a straight line unless acted upon by some force -Every object at rest continues at rest unless acted upon by a force -So forces cause a change in an object's state of motion

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32. Piston travels down and intake valve is opened. Intake of fuel and air into chamber






33. A combination of components






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






35. 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






36. Compression of fuel mix






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






38. (pi) x (radius)^2






39. Psi - newtons - pascals






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






41. Force without machine/Force with machine






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






43. Exhaust of combustion products






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






45. Static - Dynamic






46. Length x Width x Height






47. Describes how applied forces bring a body into motion






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






49. When two parallel forces equal in magnitude and opposite direction - i.e. steering wheel - turn a know - turn on and off a faucet






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