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^2+b^2=c^2






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






4. Describes how applied forces bring a body into motion






5. A device that uses energy to do work to accomplish some desired activity - They do not produce energy - but they do transmit and transform energy - Machines can transmit a force - control its motion - and change its direction - a system of components






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






7. Air is drawn in






8. Ignition - power stroke






9. When the fluid is in motion






10. One that pushes on an object






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






12. 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)






13. Compression of fuel mix






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






15. Exhaust of combustion products






16. Length / Time






17. The branch of science and engineering involving measurement






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






19. 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






20. Dimensions and units






21. Brake pedal and linkage - Master Cylinder - Wheel cylinders (4) - Hydraulic lines - Hydraulic fluid - Mechanical advantage is provided by the foot pedal to the booster (level) - A greater force is applied on the wheel cylinders than on the brake peda






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






23. A^2+b^2=c^2 - used to calculate vectors






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






25. Liquid or gas






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






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






29. What we are studying






30. Applied at an angle or parallel to a surface






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






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

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






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






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






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






38. 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






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






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






41. Weight/Time






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






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






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






45. Compression-Tension-Shear






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






47. (pi) x (radius)^2






48. Length x Width x Height






49. A combination of components






50. 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