Test your basic knowledge |

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






2. An application of Pascal's Principle (trading distance and force while doing the same amount of work) -Gives a mechanical advantage -The muscles of machines - used to produce very large forces - use a fluid under pressure (gas is low pressure and liq






3. Force/Area






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






5. A combination of components






6. One that pushes on an object






7. A pull on an object






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






9. Piston travels up and both plugs are closed






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






11. Force without machine/Force with machine






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






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






14. The force simple machines use to do work on a single load or against a single force






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






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






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






18. Intake of fuel and air mix






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






20. 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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21. Translation (slide) -Rotate -Slide and Rotate Together






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






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






24. Dimensions and units






25. Mass x acceleration






26. 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






27. 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






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






29. Body in motion (car)






30. Work/force or vertical distance/sloping distance






31. Applied at an angle or parallel to a surface






32. Ignition - power stroke






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






34. The magnitude of something in a particular direction






35. When the moving fluid is a gas






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






38. Rotation will not occur - but translation might occur






39. Compression-Tension-Shear






40. ...






41. (pi) x (radius)^2






42. Compression of fuel mix






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






44. Result of a force moving an object against a resistance through some distance in a desired direction -Work transfers energy -Work is a measure of what is done and not the effort applied - Done by lifting - pushing - rotating - or sliding -W=Fd -F=Amo






45. Combustion of fuel mixture ignited by spark plug






46. In a hydraulic with an incompressible fluid - the total pressure at any point in the system is the same - liquid

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






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






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






50. Are independent of other dimensions - They are limited in number - length - mass - time - temperature - force