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






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






3. Can be applied at a time on an object






4. What we are not studying






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






6. 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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7. Exhaust






8. 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)






9. Piston travels up and both plugs are closed






10. Combustion ignited by spark plug and materials are compressed






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






12. 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






13. When the fluid is in motion






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






15. Weight/Time






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






17. Force/Area






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






19. Air is drawn in






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






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






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






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






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






25. Liquid or gas






26. 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






27. Applied at an angle or parallel to a surface






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






29. Length x Width x Height






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






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






32. (Force)(Distance)/Seconds






33. ...






34. Rotation will not occur - but translation might occur






35. Dimensions and units






36. 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






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






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






39. Compression-Tension-Shear






40. 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






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






43. Combustion of fuel mixture ignited by spark plug






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






45. More compact (size of beer keg) - No valves -Benefits: fewer parts - lower engine weight Problems: seal - lower inertia forces -1 rotar=3 to 4 pistons






46. Static - Dynamic






47. (pi) x (radius)^2






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






49. When the moving fluid is a gas






50. The magnitude of something in a particular direction