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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. Combustion of fuel mixture ignited by spark plug






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






3. A combination of components






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






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






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






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






8. Applied at an angle or parallel to a surface






9. 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.






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






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






12. Varies by location (on earth) - distance (from earth) - and mass (of planet)






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






14. Body in motion (car)






15. 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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16. Exhaust






17. Work/force or vertical distance/sloping distance






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






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






20. Psi - newtons - pascals






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






22. 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






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






24. Force without machine/Force with machine






25. Combustion ignited by spark plug and materials are compressed






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






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. Compression of fuel mix






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






30. Exhaust of combustion products






31. 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






32. When fluid is at rest






33. When the moving fluid is a gas






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






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






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






38. Piston travels up and both plugs are closed






39. Rotation will not occur - but translation might occur






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






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






42. Length x Width x Height






43. Force/Area






44. Combine two or more power sources - locomotives - buses (diesel- electric) -Submarines (Nuclear- electric) -Components:gas engine - fuel tank - electric motor - generator - batteries - transmission -2 motors: Internal Combustion Engine and Electric E






45. 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






46. The magnitude of something in a particular direction






47. When the fluid is in motion






48. Mass x acceleration






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






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







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