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






2. The magnitude of something in a particular direction






3. 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






4. 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






5. What we are studying






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






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






8. Mass x acceleration






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






10. Liquid or gas






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






12. One that pushes on an object






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






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






15. Rotation will not occur - but translation might occur






16. Force x Distance






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






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






19. 1. Magnitude: size - a numberi.e. 50 mph 2. Direction: angle i.e. N -E -W -S






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

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






22. Exhaust






23. Ignition - power stroke






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






25. Dimensions and units






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






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






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






29. Applied at an angle or parallel to a surface






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






31. 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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32. The branch of science and engineering involving measurement






33. Used to measure or quantify -US Common: Absolute and Gravitational -SI: absolute






34. Force without machine/Force with machine






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






36. 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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37. A pull on an object






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






39. 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






40. 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






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






42. Rotation may occur






43. 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






44. Length x Width x Height






45. 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






46. Static - Dynamic






47. 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 (






48. Describes how applied forces bring a body into motion






49. Often a free body has _______ acting on it






50. 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