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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. Liquid or gas






2. Mass x acceleration






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






4. Ignition - power stroke






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






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






7. 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






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

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9. The branch of science and engineering involving measurement






10. Length x Width x Height






11. Applied at an angle or parallel to a surface






12. Weight/Time






13. 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






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






15. 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






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






17. Combustion of fuel mixture ignited by spark plug






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






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






20. 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)






21. (Force)(Distance)/Seconds






22. When the moving fluid is a gas






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






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






25. 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






26. 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






27. Length x Width






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






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






30. A combination of components






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






32. The magnitude of something in a particular direction






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






34. Derived from - or composed of - base dimensions i.e. Area (length x width) - Weight (mass x acceleration) - velocity (length/time)






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






36. Three- dimensional property measured in units of length times length times length =length x width x height






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






38. When the fluid is in motion






39. 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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40. Can be applied at a time on an object






41. 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






42. Body in motion (car)






43. Air is drawn in






44. Static - Dynamic






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






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






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






48. 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






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






50. Old technology- harder to service-Still used on big trucks and trailers because they are too expensive to convert