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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. Weight/Time






2. Describes how applied forces bring a body into motion






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






4. 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






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






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






7. Dimensions and units






8. Compression of fuel mix






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






10. 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






11. Work/force or vertical distance/sloping distance






12. 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






13. Can be applied at a time on an object






14. 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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15. 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






16. When the fluid is in motion






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






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






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






20. Length / Time






21. Air is drawn in






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






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. One that pushes on an object






25. 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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26. 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






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






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






29. Rotation will not occur - but translation might occur






30. What we are not studying






31. What we are studying






32. A combination of components






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






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






35. When fluid is at rest






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






37. Brake pedal and linkage - Master Cylinder - Wheel cylinders (4) - Hydraulic lines - Hydraulic fluid - Mechanical advantage is provided by the foot pedal to the booster (level) - A greater force is applied on the wheel cylinders than on the brake peda






38. (Force)(Distance)/Seconds






39. Combustion ignited by spark plug and materials are compressed






40. Piston travels up and both plugs are closed






41. (pi) x (radius)^2






42. ...






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






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






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






46. 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.






47. The branch of science and engineering involving measurement






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






49. Exhaust






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







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