Recommended general Questions P1

Question 1

1. Which one of the following conditions will affect the rate and 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

Answer 1

B. the surface condition of the specimen being tested

Question 2

2. Which of the following is a commonly-used classification for penetrants?

A. post-emulsification penetrant
B. nonferrous penetrant
C. chemical etch penetrant
D. nonaqueous penetrant

Answer 2

A. post-emulsification penetrant

Question 3

3. A generally-accepted method for removing excess nonwater soluble 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

Answer 3

d. wiping and cautiously cleaning the test specimen with a cleaner-dampened cloth

Question 4

4. Which of the following parts could not be tested by the liquid penetrant method?

A. an iron casting
B.an aluminum forging
C. a part made from a porous material
D. a part made from a nonporous material

Answer 4

C. a part made from a porous material

Question 5

5. Which of the following discontinuities can be found by the penetrant test method?

A. a surface crack
B. a subsurface crack
C. an internal inclusion
D. none of the above

Answer 5

A. a surface crack

Question 6

6. Which of the following is generally the most acceptable method for cleaning parts prior to penetrant testing?

a. sand blasting
b. wire brushing
c. grinding
d. vapor degreasing

Answer 6

d. vapor degreasing

Question 7

7. Which of the following is not a generally-accepted method for cleaning parts prior to penetrant testing?

A. vapor degreasing
B. liquid solvent
C. wire brushing
D. alkaline cleaner

Answer 7

C. wire brushing

Question 8

8. After the excess water-washable penetrant has been rinsed off the surface of a part being penetrant tested, it is common practice 10 dry the part. The dying ovens used for this process should not exceed 120°C because:

A. there will be an excessive amount of bleed out if the drying oven is hotter than 120°c
B. excess heat may cause a loss in sensitivity of the penetrant
C. the penetrant will emit toxic fumes if the drying oven is hotter than 120°C
D. the parts will be too hot to inspect

Answer 8

B. excess heat may cause a loss in sensitivity of the penetrant

Question 9

9. The most common type of contaminate found in fluorescent penetrant fluid is:

a. metal filings
b. oil
c. detergents (from cleaning)
d. water

Answer 9

d. water

Question 10

10. Black light used for fluorescent penetrant inspection can cause permanent damage to:

A. human tissues
B. human eyes
C. human blood cells
D. none of the above

Answer 10

D. none of the above

Question 11

11. Which of the following is not a basic inspection principle which applies to all penetrant methods?

a. the penetrant must enter the discontinuity to form an indication B. indications glow when subjected to a black light
C. a longer penetrant time is required for smaller discontinuities
d. if the penetrant is washed out of the discontinuity, an indication will not be formed by that discontinuity

Answer 11

B. indications glow when subjected to a black light

Question 12

12. Sub-surface discontinuities can best be detected by:

a. the post-emulsification penetrant method
B. the visible dye penetrant method
C. the fluorescent, water-washable penetrant method
d, none of the above will detect sub-surface discontinuities

Answer 12

d, none of the above will detect sub-surface discontinuities

Question 13

13. Which of the materials listed below is not normally tested by the liquid penetrant test method?

A. rubber
B. aluminum
C. glass
D. copper

Answer 13

A. rubber

Question 14

14. 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

Answer 14

B. completely remove the paint

Question 15

15. When using a post emulsification penetrant, it is necessary to apply the emulsifier:

A. before applying the penetrant
B. after the water wash operation
C. after the penetration time has elapsed
D. after the development time has elapsed

Answer 15

C. after the penetration time has elapsed

Question 15

16. Which of the following discontinuities would be impossible to detect using a liquid penetrant test?

A. forging lap
B. crater crack
C. grinding cracks
D. nonmetallic internal inclusions

Answer 15

D. nonmetallic internal inclusions

Question 16

18. The term used to describe the action of the developer in soaking up the penetrant in a discontinuity, to cause the maximum bleed out of the liquid penetrant for increased contrast and sensitivity is known as:

A. blotting
B. capillary action
C. concentration
D. attraction

Answer 16

A. blotting

Question 17

17. When conducting a water washable liquid penetrant test, the developer is applied:

A. immediately after the penetrant has been applied
B. immediately before the penetrant is applied
C. after removal of the penetrant
D. after removal of the emulsifier

Answer 17

C. after removal of the penetrant

Question 18

19. A black light lamp should not be used with a cracked filter or without the filter in place because of the harmful effects to the human eyes caused by __________ emitted from such a lamp.

A. black light
B. ultraviolet light
C. infrared light
D.none of the above

Answer 18

B. ultraviolet light

Question 19

21. The most desirable method of removing excess water-washable penetrant after the necessary penetration time is by:

A. a coarse pressure water spray
B. water and brush
C. a solid stream of water
D. water and clean rags

Answer 19

A. a coarse pressure water spray

Question 20

20. The term used to define the period of time in which the test part is covered with penetrant is:

A. waiting time
B. soak time (drain time)
C. penetration time (dwell time)
D. bleed-in time

Answer 20

C. penetration time (dwell time)

Question 21

When conducting a liquid penetrant test using a post-emulsifiable dye penetrant, the generally-accepted method for applying the wet developer is:

a. brushing
b. swabbing
C. dipping
D. spraying

Answer 21

D. spraying

Question 22

23. Which of the following is not a characteristic that applies to liquid penetrant testing?

A. this method can accurately measure the depth of a crack or discontinuity
B. this method can be used for on-site testing of large parts
C. this method can be used to find shallow surface discontinuities
D. this method can be made more or less sensitive by using different penetrant materials

Answer 22

A. this method can accurately measure the depth of a crack or discontinuity

Question 23

24, Which of the following discontinuities is most likely to be missed due to improper rinse techniques?

A. forging lap
B. deep pitting
C. shallow and broad discontinuities
D. the rinse technique will not affect the detection of discontinuities

Answer 23

C. shallow and broad discontinuities