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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. Often a free body has _______ acting on it






2. Psi - newtons - pascals






3. 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






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






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






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






8. Work/force or vertical distance/sloping distance






9. Compression of fuel mix






10. Static - Dynamic






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






12. When fluid is at rest






13. When the fluid is in motion






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






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






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






17. What we are studying






18. 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






19. Rotation may occur






20. If the force needed to operate the machine (input force) is less than the force being opposed or the load being moved (output force) -The ratio of the output force divided by the input force -If the number is greater than one - there is a mechanical






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. Force/Area






23. Exhaust of combustion products






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






25. Rotation will not occur - but translation might occur






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






27. Piston travels up and both plugs are closed






28. 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.






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






30. (pi) x (radius)^2






31. Air is drawn in






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






33. Length / Time






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






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






36. When the moving fluid is a gas






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






38. Exhaust






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






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






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






42. Mass x acceleration






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






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






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






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






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






48. Can be applied at a time on an object






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






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







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Can you answer 50 questions in 15 minutes?


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