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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. When two parallel forces equal in magnitude and opposite direction - i.e. steering wheel - turn a know - turn on and off a faucet






2. Combustion ignited by spark plug and materials are compressed






3. (Force)(Distance)/Seconds






4. 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






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






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






7. Length x Width x Height






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






10. 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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11. Exhaust






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. 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 (






14. Rotation will not occur - but translation might occur






15. The magnitude of something in a particular direction






16. Dimensions and units






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






18. Mass x acceleration






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






20. Exhaust of combustion products






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






22. Force without machine/Force with machine






23. Force/Area






24. (pi) x (radius)^2






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






26. Describes how applied forces bring a body into motion






27. Piston travels up and both plugs are closed






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






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






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






32. When fluid is at rest






33. When the work done by the effort just equals the work done by the load - ______ of the machine will occur






34. Work/force or vertical distance/sloping distance






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






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






37. Applied at an angle or parallel to a surface






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






39. Liquid or gas






40. A pull on an object






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






42. ...






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






44. Static - Dynamic






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






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






47. When the moving fluid is a gas






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






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






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