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. 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






2. Length x Width






3. Air is drawn in






4. Applied at an angle or parallel to a surface






5. Force without machine/Force with machine






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






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






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






9. 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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10. What we are not studying






11. Can be applied at a time on an object






12. The magnitude of something in a particular direction






13. When fluid is at rest






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






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






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






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






18. Body in motion (car)






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






20. A combination of components






21. Combustion of fuel mixture ignited by spark plug






22. 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






23. When the moving fluid is a gas






24. 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






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






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






27. Force x Distance






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






29. 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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30. A change in velocity over time -Unites: USA- ft/s^2 and SI: m/s^2






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






32. Mass x acceleration






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






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






35. Work/force or vertical distance/sloping distance






36. Piston travels up and both plugs are closed






37. Rotation may occur






38. 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






39. Intake of fuel and air mix






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






41. 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






42. 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






43. (Force)(Distance)/Seconds






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






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






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






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






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






50. ...