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






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






3. Mass x acceleration






4. What we are not studying






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






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






7. Dimensions and units






8. Can be applied at a time on an object






9. Rotation will not occur - but translation might occur






10. (Force)(Distance)/Seconds






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






12. Applied at an angle or parallel to a surface






13. Exhaust of combustion products






14. 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






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






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






17. When fluid is at rest






18. A pull on an object






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






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






21. 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 (






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






24. When the fluid is in motion






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






26. 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






27. Piston travels up and both plugs are closed






28. Pistons connected to crankshaft -1 stroke up - 1 stroke down of the piston -1 rotation of the piston -Problems: high emissions - noisy - inefficient - high vibrations - unburnt fuel - burnt oil -Benefits: small and light -Being phased out in USA - i.






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






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






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






32. One that pushes on an object






33. Exhaust






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






35. Work/force or vertical distance/sloping distance






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






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






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






40. Force x Distance






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






42. Rotation may occur






43. Compression of fuel mix






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






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






46. Force/Area






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






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






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






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