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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. Length x Width x Height






2. 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






3. 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






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






5. Piston travels up and both plugs are closed






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






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






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






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






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






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






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






13. Mass x acceleration






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






15. Length x Width






16. 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






17. Rotation may occur






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






19. More compact (size of beer keg) - No valves -Benefits: fewer parts - lower engine weight Problems: seal - lower inertia forces -1 rotar=3 to 4 pistons






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






21. Intake of fuel and air mix






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






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






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






25. Force x Distance






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






27. 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






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






29. Psi - newtons - pascals






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






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






32. (Force)(Distance)/Seconds






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






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






35. Air is drawn in






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






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






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






40. The magnitude of something in a particular direction






41. Work/force or vertical distance/sloping distance






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






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






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






45. Often a free body has _______ acting on it






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






47. 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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48. Body in motion (car)






49. Compression of fuel mix






50. Weight/Time