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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. The magnitude of something in a particular direction






2. Can be applied:-By direct contact: push - pull - twist -At a distance: gravity - magnetism Can change: speed - direction - shape - units of force






3. Rotation may occur






4. When fluid is at rest






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






6. Exhaust






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






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






9. Length x Width x Height






10. Compression-Tension-Shear






11. Exhaust of combustion products






12. 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






13. Force/Area






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






15. 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






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






17. Length x Width






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






19. Force x Distance






20. The branch of science and engineering involving measurement






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






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






23. Work/force or vertical distance/sloping distance






24. Psi - newtons - pascals






25. Combustion ignited by spark plug and materials are compressed






26. Dimensions and units






27. Can be applied at a time on an object






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






29. 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






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






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






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






33. Liquid or gas






34. What we are not studying






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






36. Intake of fuel and air mix






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






38. 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 (






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






40. (Force)(Distance)/Seconds






41. Static - Dynamic






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






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






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






46. Compression of fuel mix






47. The amount of atoms and molecules in something - Matter is energy that has become solid -An object gains mass when it gains more energy and vice a versa -Units: SI- kgs and USA: Slugs - lbs






48. 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)






49. 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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50. 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