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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. 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






2. Weight/Time






3. For every action there is an equal and opposite reaction -Force -F=mg -Earth exerts a force on all of us

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4. Describes how applied forces bring a body into motion






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






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






7. Force x Distance






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






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






10. Dimensions and units






11. Applied at an angle or parallel to a surface






12. Incompressible (volume doesnt change) Transmit force evenly - Lubricates - Trap contaminants - Some based on vegetable oils - Biodegradable - Aircraft fluids noncombustible (thins as temperature rises)






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






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






15. Psi - newtons - pascals






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






18. Can be reduced by decreasing the weight or force or increasing the area i.e. airbag






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






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






22. Air is drawn in






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






24. 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






25. Length / Time






26. In a right triangle - the sum of the squares of the sides equals the square of the hypotenous






27. External Combustion engine -Only used in factories and plants (not used in cars)






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






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






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






31. A pull on an object






32. Liquid or gas






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






34. Compression-Tension-Shear






35. The branch of science and engineering involving measurement






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






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






38. Intake of fuel and air mix






39. 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






40. An application of Pascal's Principle (trading distance and force while doing the same amount of work) -Gives a mechanical advantage -The muscles of machines - used to produce very large forces - use a fluid under pressure (gas is low pressure and liq






41. A device that uses energy to do work to accomplish some desired activity - They do not produce energy - but they do transmit and transform energy - Machines can transmit a force - control its motion - and change its direction - a system of components






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






43. Result of a force moving an object against a resistance through some distance in a desired direction -Work transfers energy -Work is a measure of what is done and not the effort applied - Done by lifting - pushing - rotating - or sliding -W=Fd -F=Amo






44. The magnitude of something in a particular direction






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






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






47. Static - Dynamic






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






49. One that pushes on an object






50. Rotation will not occur - but translation might occur