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NDT year 2, test 1
16問 • 2年前
  • Zachary Halycz
  • 通報

    問題一覧

  • 1

    what is the first level of government certification for the liquid penetrant method?

    level 2, 1&2 combined

  • 2

    what does NDT stand for?

    non-destructive testing

  • 3

    what are reasons we do NDT? what is the most important reason?

    NDT does not damage the part being examined, the way the part starts, is the way it ends. ensures safety of the parts functionality.

  • 4

    advantages of NDT

    •materials tested not damaged or destroyed •equipment for NDT is portable

  • 5

    what is the definition of LPI?

    •liquid penetrant inspection “detects surface discontinuities in non-pourous materials

  • 6

    advantages of LPI

    low cost, portable, small defects located, simple method of inspection, works on variety’s of metals.

  • 7

    disadvantages of LPI?

    •parts need to be exceedingly clean and dry • can’t locate sub-surface defects •can’t be used on pourous materials •messy •can cause corrosion

  • 8

    what kind of defects can LPI find?

    1 nano meter surface breaking

  • 9

    what are the system controls that can be done?

    1. water temperature and pressure check 2. dryer uniformity 3. test pieces “aluminum block”

  • 10

    what was LPI called in the days of rail road inspection?

    oil and whiting method

  • 11

    what force/ action makes LPI possible?

    cappliary force, causes liquids to creep and crawl

  • 12

    what are 3 characteristics of a good penetrant?

    oil based, low surface tension, high wet ability

  • 13

    what is surface tension (dynes/cm) of a good penetrant?

    10-15 dynes/cm

  • 14

    what are the classifications for discontinuities (defects)

    1. inherent “casting stage” 2. processing 3. surface discontinuities 4. service

  • 15

    when are inherent discontinuities formed?

    •when something is made by casting, “porosity” occurs internally and externally. •half moon appearance •foreign debris caught in material

  • 16

    what are defects called that occur when a part is being used?

    part in service

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    問題一覧

  • 1

    what is the first level of government certification for the liquid penetrant method?

    level 2, 1&2 combined

  • 2

    what does NDT stand for?

    non-destructive testing

  • 3

    what are reasons we do NDT? what is the most important reason?

    NDT does not damage the part being examined, the way the part starts, is the way it ends. ensures safety of the parts functionality.

  • 4

    advantages of NDT

    •materials tested not damaged or destroyed •equipment for NDT is portable

  • 5

    what is the definition of LPI?

    •liquid penetrant inspection “detects surface discontinuities in non-pourous materials

  • 6

    advantages of LPI

    low cost, portable, small defects located, simple method of inspection, works on variety’s of metals.

  • 7

    disadvantages of LPI?

    •parts need to be exceedingly clean and dry • can’t locate sub-surface defects •can’t be used on pourous materials •messy •can cause corrosion

  • 8

    what kind of defects can LPI find?

    1 nano meter surface breaking

  • 9

    what are the system controls that can be done?

    1. water temperature and pressure check 2. dryer uniformity 3. test pieces “aluminum block”

  • 10

    what was LPI called in the days of rail road inspection?

    oil and whiting method

  • 11

    what force/ action makes LPI possible?

    cappliary force, causes liquids to creep and crawl

  • 12

    what are 3 characteristics of a good penetrant?

    oil based, low surface tension, high wet ability

  • 13

    what is surface tension (dynes/cm) of a good penetrant?

    10-15 dynes/cm

  • 14

    what are the classifications for discontinuities (defects)

    1. inherent “casting stage” 2. processing 3. surface discontinuities 4. service

  • 15

    when are inherent discontinuities formed?

    •when something is made by casting, “porosity” occurs internally and externally. •half moon appearance •foreign debris caught in material

  • 16

    what are defects called that occur when a part is being used?

    part in service