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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. 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






2. Exhaust






3. 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






4. Dimensions and units






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






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






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






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






9. Piston travels up and both plugs are closed






10. The magnitude of something in a particular direction






11. 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






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






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






14. Work/force or vertical distance/sloping distance






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






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






17. (pi) x (radius)^2






18. ...






19. Often a free body has _______ acting on it






20. Length x Width






21. Every object continues in motion in a straight line unless acted upon by some force -Every object at rest continues at rest unless acted upon by a force -So forces cause a change in an object's state of motion

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22. Friction changes KE to heat energy- Heat is transferred to air- Front brakes work harder than rear- Some brakes use asbestos- Newer cars have dual braking systems - Don't drive through water or your brakes won't work well (ride breaks to dry them out






23. What we are studying






24. Force/Area






25. 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 (






26. 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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27. The branch of science and engineering involving measurement






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






29. A pull on an object






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






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






32. 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.






33. Weight/Time






34. Force x Distance






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






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






37. 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






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






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






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






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






42. Can be reduced by decreasing the weight or force or increasing the area i.e. airbag






43. Force without machine/Force with machine






44. Describes how applied forces bring a body into motion






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






46. (Force)(Distance)/Seconds






47. Exhaust of combustion products






48. Air is drawn in






49. Rotation will not occur - but translation might occur






50. One that pushes on an object






Can you answer 50 questions in 15 minutes?



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