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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. Air is drawn in






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






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






4. Length x Width






5. The magnitude of something in a particular direction






6. Rotation will not occur - but translation might occur






7. A pull on an object






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






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






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






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






12. Mass x acceleration






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






14. What we are studying






15. Length x Width x Height






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






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






18. Applied at an angle or parallel to a surface






19. 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






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






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






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






23. 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.






24. 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






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






26. 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






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






28. 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






29. 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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30. ...






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






32. Ignition - power stroke






33. One that pushes on an object






34. Work/force or vertical distance/sloping distance






35. Intake of fuel and air mix






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






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






38. Force/Area






39. 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






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






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






43. Combustion ignited by spark plug and materials are compressed






44. 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 (






45. (pi) x (radius)^2






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






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






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






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






50. Exhaust