MDT Exam 1 PT UPDATED QUESTIONS
AND CORRECT ANSWERS
Which one of the following conditions will affect the rate and the extent a liquid penetrant
will enter cracks, fissures and other small openings?
a. the hardness of the specimen being tested
b. the surface condition of the specimen being tested
c. the color of the penetrant
d. the conductivity of the specimen being tested - CORRECT ANSWER b. the surface
condition of the specimen being tested
Which of the following is a commonly used classification for penetrant?
a. postemulsifiable penetrant
b. nonferrous penetrant
c. chemical etch penetrant
d. nonaqueous penetrant - CORRECT ANSWER a. postemulsifiable penetrant
A generally accepted method for removing excess nonwater washable penetrant is:
a. repeatedly dipping the test specimen in a cleaner
b. soaking the test specimen in hot detergent water
c. blowing the excess penetrant off the surface of the part with compressed air
d. wiping and cautiously cleaning the test specimen with a cleaner-dampened cloth -
CORRECT ANSWER d. wiping and cautiously cleaning the test specimen with a
cleaner-dampened cloth
Which of the following is generally the more acceptable method for cleaning parts prior to
penetrant testing?
a. sand blasting
b. wire brushing
c. grinding
, d. vapor degreasing - CORRECT ANSWER d. vapor degreasing
The first step in conducting a liquid penetrant test on a surface that has been painted is to:
a. carefully apply the penetrant over the surface
b. completely remove the paint
c. thoroughly wash the surface with a detergent
d. wire brush the surface to roughen the smooth surface coating of paint - CORRECT
ANSWER b. completely remove the paint
When conducting a liquid penetrant test using a postemulsifiable visible dye penetrant, the
generally accepted method for applying the wet developer is by:
a. brushing
b. swabbing
c. dipping
d. spraying - CORRECT ANSWER d. spraying
Which of the following surface conditions could have a detrimental effect on a liquid
penetrant test?
a. a wet surface
b. a rough weld
c. an oily surface
d. all of the above - CORRECT ANSWER d. all of the above
When using a postemulsifiable penetrant, the emulsifier time should be:
a. as long as the penetrant dwell time
b. half the penetrant dwell time
c. the same as the developer time
d. only as long as necessary to remove the interfering background - CORRECT
ANSWER d. only as long as necessary to remove the interfering background
AND CORRECT ANSWERS
Which one of the following conditions will affect the rate and the extent a liquid penetrant
will enter cracks, fissures and other small openings?
a. the hardness of the specimen being tested
b. the surface condition of the specimen being tested
c. the color of the penetrant
d. the conductivity of the specimen being tested - CORRECT ANSWER b. the surface
condition of the specimen being tested
Which of the following is a commonly used classification for penetrant?
a. postemulsifiable penetrant
b. nonferrous penetrant
c. chemical etch penetrant
d. nonaqueous penetrant - CORRECT ANSWER a. postemulsifiable penetrant
A generally accepted method for removing excess nonwater washable penetrant is:
a. repeatedly dipping the test specimen in a cleaner
b. soaking the test specimen in hot detergent water
c. blowing the excess penetrant off the surface of the part with compressed air
d. wiping and cautiously cleaning the test specimen with a cleaner-dampened cloth -
CORRECT ANSWER d. wiping and cautiously cleaning the test specimen with a
cleaner-dampened cloth
Which of the following is generally the more acceptable method for cleaning parts prior to
penetrant testing?
a. sand blasting
b. wire brushing
c. grinding
, d. vapor degreasing - CORRECT ANSWER d. vapor degreasing
The first step in conducting a liquid penetrant test on a surface that has been painted is to:
a. carefully apply the penetrant over the surface
b. completely remove the paint
c. thoroughly wash the surface with a detergent
d. wire brush the surface to roughen the smooth surface coating of paint - CORRECT
ANSWER b. completely remove the paint
When conducting a liquid penetrant test using a postemulsifiable visible dye penetrant, the
generally accepted method for applying the wet developer is by:
a. brushing
b. swabbing
c. dipping
d. spraying - CORRECT ANSWER d. spraying
Which of the following surface conditions could have a detrimental effect on a liquid
penetrant test?
a. a wet surface
b. a rough weld
c. an oily surface
d. all of the above - CORRECT ANSWER d. all of the above
When using a postemulsifiable penetrant, the emulsifier time should be:
a. as long as the penetrant dwell time
b. half the penetrant dwell time
c. the same as the developer time
d. only as long as necessary to remove the interfering background - CORRECT
ANSWER d. only as long as necessary to remove the interfering background
