Test your basic knowledge |

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. 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






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






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






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






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






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






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






8. Rotation may occur






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






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






11. Liquid or gas






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


13. When the moving fluid is a gas






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






15. Body in motion (car)






16. Compression of fuel mix






17. A combination of components






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






19. What we are studying






20. Piston travels up and both plugs are closed






21. Mass x acceleration






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






23. For every action there is an equal and opposite reaction -Force -F=mg -Earth exerts a force on all of us


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






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. Mass can neither by created nor destroyed - only transformed






27. (Force)(Distance)/Seconds






28. Combustion ignited by spark plug and materials are compressed






29. Work/force or vertical distance/sloping distance






30. 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






31. Static - Dynamic






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






33. Compression-Tension-Shear






34. One that pushes on an object






35. 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






36. Describes how applied forces bring a body into motion






37. (pi) x (radius)^2






38. Can be applied at a time on an object






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






40. 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






41. Combustion of fuel mixture ignited by spark plug






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






43. 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.






44. Length x Width






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






46. Length x Width x Height






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






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






49. Exhaust






50. Body at rest or is in equilibrium (wall)