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






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






3. Rotation may occur






4. Exhaust






5. Rotation will not occur - but translation might occur






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






7. Compression-Tension-Shear






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






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






11. The branch of science and engineering involving measurement






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






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






14. One that pushes on an object






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






16. Applied at an angle or parallel to a surface






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






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






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






20. (Force)(Distance)/Seconds






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






22. Piston travels up and both plugs are closed






23. Body in motion (car)






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






25. 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.






26. Movement along a line (reciprocal or linear motion) -Units: feet and meters






27. Work/force or vertical distance/sloping distance






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






29. 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






30. A flat - sloping surface -The only simple machine that does not move -The force is applied to the ramp - since this is the direction the load weight is moved -Sloping side is longer than vertical side -Less force is required to accomplish the same am






31. When the fluid is in motion






32. 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






33. When fluid is at rest






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

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35. 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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36. Translation (slide) -Rotate -Slide and Rotate Together






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






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






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






40. Length x Width






41. A pull on an object






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






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






44. Force without machine/Force with machine






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






46. What we are not studying






47. When the moving fluid is a gas






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






49. Weight/Time






50. Ignition - power stroke