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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. The magnitude of something in a particular direction






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






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






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






5. Force/Area






6. 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






7. A pull on an object






8. Static - Dynamic






9. 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)






10. One that pushes on an object






11. Applied at an angle or parallel to a surface






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






13. The branch of science and engineering involving measurement






14. 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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15. Energy may enter or leave. Mass can enter or leave the system i.e. open water bottle - molecule - hydraulic cylinder - human






16. Compression-Tension-Shear






17. Body in motion (car)






18. A^2+b^2=c^2






19. When fluid is at rest






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






21. ...






22. Rotation will not occur - but translation might occur






23. A combination of components






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






25. Combustion ignited by spark plug and materials are compressed






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. Length x Width x Height






28. Ignition - power stroke






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






30. When a simple machine increases a force it is at the expense of a ____ in the distance the load is moved






31. The perpendicular distance from the pivot point to the point of application of the force (d) - M=Fd -Clockwise=Negative moment -Counterclockwise=Positive moment






32. Dimensions and units






33. When the moving fluid is a gas






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






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






36. 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






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






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






39. Translation (slide) -Rotate -Slide and Rotate Together






40. Intake of fuel and air mix






41. Often a free body has _______ acting on it






42. Describes how applied forces bring a body into motion






43. The designing of machines that contribute to society and our quality of life - Mechanical engineers apply the principles of mathematics - chemistry - and physics to solve real- world problems






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






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






46. (Force)(Distance)/Seconds






47. 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






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






49. What we are not studying






50. Piston travels up and both plugs are closed







Sorry!:) No result found.

Can you answer 50 questions in 15 minutes?


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