Liquid Penetrant Level II Final Exam
Questions And Answers.
Which of the following discontinuities could be classified as a finishing processing discontinuity?
- Answer -Heat-treat crack
Aluminum alloy test specimens that have been tested by the liquid penetrant method should be
thoroughly cleaned after testing because: - Answer -the alkaline content of wet developers
and most emulsifiers could result in surface pitting, particularly in moist atmospheres.
Which factor would apply in determining the dwell time required for the penetrant to be
effective? - Answer -Type of discontinuity sought.
Which of the following physical properties, more than any other, determines what makes a
material a good penetrant? - Answer -No one single property determines if a material will or
will not be a good penetrant.
Which of the following discontinuities might be found in rolled plate? - Answer -Laminations
Which of the following is NOT recommended method of removing grease from a surface of a
part to be penetrant tested? - Answer -Hot water rinse
Which of the following is NOT a form in which penetrant developer is commonly available? -
Answer -High viscosity developer
When using post-emulsification penetrants, difficulties incurred during the washing operation
can be overcome by: - Answer -completely reprocessing the part from surface preparation on
and by using a longer emulsifier time.
The function of the emulsifier in the post-emulsification penetrant method is to: - Answer -
react with the surface penetrant to make the penetrant water-washable.
Which of the following is a discontinuity that might be found in forging? - Answer -Lap
, Of the methods listed below, the most effective means of precleaning a test item prior to a
penetrant test is: - Answer -vapor degreasing
Which of the following statements concerning contaminating materials on the surface of a part
to be penetrant tested is NOT true? - Answer -The contaminant may retain the penetrant and
thus increase the sensitivity of the inspection
Which of the statements below best states the danger of using sandblasting for cleaning
surfaces to be penetrant tested? - Answer -The discontinuities may be closed
The penetrant indication of a forging lap will normally be: - Answer -a continuous line
Which of the following is a discontinuity which might be found in sand castings: - Answer -
Shrinkage
Why is it advisable to have a black light installed at the wash station? - Answer -To check the
effectiveness of the wash cycle
An important difference between non-water-washable penetrants and water-washable
penetrants is that: - Answer - water-washable penetrants contain an emulsifier, while non-
water washable penetrants do not
Which of the following are typical of foreign matter which might block the openings of
discontinuities if the surface of a test specimen is NOT properly cleaned? - Answer - All of the
above. (Core and mold material, scale, paint)
The speed with which a penetrant penetrates a surface flaw is influenced to the greatest extent
by which of the following properties? - Answer -Viscosity
Which of the following is a discontinuity that might be found in rolled bar stock? - Answer -
Crack or seam
Which of the following discontinuities could be classified as a primary processing discontinuity
often found in cast material - Answer -Porosity
Questions And Answers.
Which of the following discontinuities could be classified as a finishing processing discontinuity?
- Answer -Heat-treat crack
Aluminum alloy test specimens that have been tested by the liquid penetrant method should be
thoroughly cleaned after testing because: - Answer -the alkaline content of wet developers
and most emulsifiers could result in surface pitting, particularly in moist atmospheres.
Which factor would apply in determining the dwell time required for the penetrant to be
effective? - Answer -Type of discontinuity sought.
Which of the following physical properties, more than any other, determines what makes a
material a good penetrant? - Answer -No one single property determines if a material will or
will not be a good penetrant.
Which of the following discontinuities might be found in rolled plate? - Answer -Laminations
Which of the following is NOT recommended method of removing grease from a surface of a
part to be penetrant tested? - Answer -Hot water rinse
Which of the following is NOT a form in which penetrant developer is commonly available? -
Answer -High viscosity developer
When using post-emulsification penetrants, difficulties incurred during the washing operation
can be overcome by: - Answer -completely reprocessing the part from surface preparation on
and by using a longer emulsifier time.
The function of the emulsifier in the post-emulsification penetrant method is to: - Answer -
react with the surface penetrant to make the penetrant water-washable.
Which of the following is a discontinuity that might be found in forging? - Answer -Lap
, Of the methods listed below, the most effective means of precleaning a test item prior to a
penetrant test is: - Answer -vapor degreasing
Which of the following statements concerning contaminating materials on the surface of a part
to be penetrant tested is NOT true? - Answer -The contaminant may retain the penetrant and
thus increase the sensitivity of the inspection
Which of the statements below best states the danger of using sandblasting for cleaning
surfaces to be penetrant tested? - Answer -The discontinuities may be closed
The penetrant indication of a forging lap will normally be: - Answer -a continuous line
Which of the following is a discontinuity which might be found in sand castings: - Answer -
Shrinkage
Why is it advisable to have a black light installed at the wash station? - Answer -To check the
effectiveness of the wash cycle
An important difference between non-water-washable penetrants and water-washable
penetrants is that: - Answer - water-washable penetrants contain an emulsifier, while non-
water washable penetrants do not
Which of the following are typical of foreign matter which might block the openings of
discontinuities if the surface of a test specimen is NOT properly cleaned? - Answer - All of the
above. (Core and mold material, scale, paint)
The speed with which a penetrant penetrates a surface flaw is influenced to the greatest extent
by which of the following properties? - Answer -Viscosity
Which of the following is a discontinuity that might be found in rolled bar stock? - Answer -
Crack or seam
Which of the following discontinuities could be classified as a primary processing discontinuity
often found in cast material - Answer -Porosity
