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






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






3. (Force)(Distance)/Seconds






4. Describes a physical property of anything - What we are measuring






5. Static - Dynamic






6. Air is compressed - work is done on the system






7. 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






8. 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






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






10. Liquid or gas






11. Describes how applied forces bring a body into motion






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






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






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






15. Rotation will not occur - but translation might occur






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






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






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






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






20. 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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21. 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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22. Piston travels up and both plugs are closed






23. Ignition - power stroke






24. 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






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

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26. Psi - newtons - pascals






27. Compression of fuel mix






28. A pull on an object






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






30. Force x Distance






31. 1. Magnitude: size - a numberi.e. 50 mph 2. Direction: angle i.e. N -E -W -S






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






33. One that pushes on an object






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






35. Tells us how fast work is done - varies with time (more power is needed to do work in less time - and less power is needed to do work in more time) =Fd/s -Units: USA: ft- lb/s SI: watts (J/S)






36. 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






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






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






39. Exhaust of combustion products






40. Applied at an angle or parallel to a surface






41. When the moving fluid is a gas






42. Combustion ignited by spark plug and materials are compressed






43. Length x Width






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






45. The branch of science and engineering involving measurement






46. Compression-Tension-Shear






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






48. Body in motion (car)






49. 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






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