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






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






3. 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






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






5. 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






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






7. Weight/Time






8. Combustion of fuel mixture ignited by spark plug






9. (pi) x (radius)^2






10. Rotation will not occur - but translation might occur






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






12. Compression-Tension-Shear






13. Intake of fuel and air mix






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






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






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






17. Exhaust of combustion products






18. 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






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






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






21. Often a free body has _______ acting on it






22. Psi - newtons - pascals






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






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






25. Air is drawn in






26. 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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27. Mass x acceleration






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






29. What we are studying






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






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

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32. Liquid or gas






33. 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






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






35. Piston travels up and exhaust valve opens. Combustion by product exhaustion






36. A pull on an object






37. Piston travels down and intake valve is opened. Intake of fuel and air into chamber






38. A device that uses energy to do work to accomplish some desired activity - They do not produce energy - but they do transmit and transform energy - Machines can transmit a force - control its motion - and change its direction - a system of components






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






40. Combustion ignited by spark plug and materials are compressed






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






42. 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






43. Applied at an angle or parallel to a surface






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






45. 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 (






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






47. Can be applied at a time on an object






48. Force x Distance






49. The magnitude of something in a particular direction






50. What we are not studying