Section 5B: Inspection Examination & Testing (API 570 Pg 29-37)

Question 1

1. When UT thickness measurements are taken:

A. They must be taken by an examiner qualified to ASNT
B. The owner/user must assure competency of those taking the readings
C. The exam must be conducted with at least 100 feet – candles of light
D. A minimum of 3 readings are taken at each CML

Answer 1

B. The owner/user must assure competency of those taking the readings

Question 2

2. UT thickness measurements may be performed by the:

A. Authorized Inspector
B. Examiner
C. Authorized inspector or the examiner
D. API qualified shear wave examiner (QUTE)

Answer 2

C. Authorized inspector or the examiner

Question 3

3. The inspector should consult with a corrosion specialist when:
   A. CUI is discovered during the external inspection
   B. The grounding connection is found corroded
   C. The short-term corrosion rate changes significantly
   D. Determining an external inspection interval

Answer 3

C. The short-term corrosion rate changes significantly

Question 4

4. Which of the following is NOT an appropriate response when a piping circuit’s corrosion rate has accelerated from the historical rates?

A. Follow up with acoustic emission
B. Follow up with more thickness readings at other examination points
C. Follow up with profile RT
D. Follow up with UT scan

Answer 4

A. Follow up with acoustic emission

Question 5

5. Guided – wave examination is a tool that:

A. Accurately determines wall thickness
B. Determines a volumetric percentage wall loss
C. Accurately detects cracks
D. Accurately detects and sizes cracks

Answer 5

B. Determines a volumetric percentage wall loss

Question 6

6. Which is NOT a primary function of the external inspection?

A. Determine the condition of the insulation
B. Determine the condition of any painting systems
C. Find vibrating piping
D. Check process conditions

Answer 6

D. Check process conditions

Question 7

7. During the external inspection, the inspector should always:

A. Check the wall thickness at each CML location
B. Record for any unrecorded temporary repairs
C. Record the temperature of the piping system
D. Remove a part of any insulation to check for CUI

Answer 7

B. Record for any unrecorded temporary repairs

Question 8

8. Who is responsible to perform the external inspection on a piping system?

A. Authorized inspector
B. Examiner
C. Authorized inspector, or an examiner
D. Authorized inspector or qualified others (examiners, operations and maintenance personnel.)

Answer 8

D. Authorized inspector or qualified others (examiners, operations and maintenance personnel.)

Question 9

9. During the external inspection, the inspector should look for components that have been replaced with the incorrect metallurgy. Which of the following components are most susceptible to being replaced with the wrong metallurgy?

A. Socket – welded fittings
B. Butt– welded fittings
C. Threaded components
D. Austenitic SS components

Answer 9

C. Threaded components

Question 10

10. Personnel performing the external inspection must:

A. Be qualified by appropriate training
B. Have a valid API 570 certificate.
C. Have a valid ASNT certificate
D. Have either an API 570 or appropriate ASNT certificate

Answer 10

A. Be qualified by appropriate training

Question 11

11. During the external inspection SPECIAL attention should be given to:

A. Hangers
B. Attachment welds
C. Tees and elbows
D. Pipe shoes

Answer 11

B. Attachment welds

Question 12

12. Weep – holes in repads should normally:

A. Remain open on in-service pipe
B. Be used to test the repad welds during each pipe outage
C. Be threaded and plugged after fabrication is complete
D. Be used to pump leak sealant compounds in the cavity between the shell and repad

Answer 12

A. Remain open on in-service pipe

Question 13

13. Weep-holes in repads that are plugged should:

A. Be seal welded
B. Have the plug removed at each schedule unit outage
C. Have the plug removed at each external inspection
D. Be plugged with a material that will not hold pressure (like grease)

Answer 13

D. Be plugged with a material that will not hold pressure (like Grease)

Question 14

14. When can a fatigue crack at a branch connection be first detected?

A. After about 25% of the pipe’s life has been consumed
B. After about 50% of the pipe’s life has been consumed
C. After about 80% of the pipe’s life has been consumed
D. After a failure occurs

Answer 14

C. After about 80% of the pipe’s life has been consumed

Question 15

15. What NDE technique can be used to find hotspots on refractory lined piping?

A. Shear wave UT
B. Acoustic emissions
C. Radiography
D. Thermography

Answer 15

D. Thermography

Question 16

16. A CML is a spot used:

A. To check for various damage types (Wall loss, cracking, or HTHA)
B. Only for taking UT thickness readings
C. Only for taking UT or profile RT thickness readings
D. In RBI assessments and is called Corrosion Monitored Logic

Answer 16

A. To check for various damage types (Wall loss, cracking, or HTHA)

Question 17

17. A CML that is used for thickness measurements should be measured:

A. At least every 5 years
B. At least every 10 years
C By only using UT or profile RT
D. By only using UT

Answer 17

C. By only using UT or profile RT

Question 18

18. Which of the following is NOT necessarily a requirement when taking UT thickness readings on a piping circuit?

A. When possible take readings on the 4 pipe quadrants
B. At pipe elbow also take readings on the ID and OD
C. Take multiple readings at each examination point.
D. The technician should be qualified to ASNT SNT – TC – 1A

Answer 18

D. The technician should be qualified to ASNT SNT – TC – 1A

Question 19

19. UT thickness reading will be taken on a pipe circuit. Which of the following best describes the process for taking readings at a specified examination point?

A. Take one reading and record
B. Take multiple readings and record the highest reading of the set
C. Take multiple readings and record the average of the set
D. Take multiple readings and record the lowest reading of the set
E. Take multiple readings and record the lowest reading Or average of the set

Answer 19

E. Take multiple readings and record the lowest reading Or average of the set

Question 20

20. CMLs should always be:

A. Measured with a digital UT instrument.
B. Permanently marked on a drawing
C. Permanently marked on a drawing and on the pipe
D. Placed on each fitting in circuit

Answer 20

B. Permanently marked on a drawing

Question 21

21. In which of the following piping systems can the number of CMLs be eliminated or significantly reduced? ( Open book)

A. Crude unit overhead piping
B. Caustic piping.
C. Olefins cold side piping
D. Olefins cold side piping

Answer 21

C. Olefins cold side piping

Question 22

22. The number of CMLs on a piping system are being substantially reduced. Who should be consulted?

A. Corrosion specialist
B. Piping engineer
C. Both authorized inspector and engineer
D. Either authorized inspector or engineer

Answer 22

A. Corrosion specialist

Question 23

23. Which of the following corrosion mechanisms usually creates uniform corrosion?

A. Ammonia salts
B. Caustic embrittlement
C. HTHA
D. Sulfidation

Answer 23

D. Sulfidation

Question 24

24. More thickness CML’s should be selected for piping systems with:

A. More complexity in terms of fittings and branches
B. High alloy for product purity
C. Higher potential for fatigue
D. Having the possibility of sulfidation corrosion

Answer 24

A. More complexity in terms of fittings and branches

Question 25

25. More thickness CML's should be selected for piping systems with: A. Long straight-run piping systems B. Higher potential for stress corrosion cracking C. Higher potential for hydrogen blistering D. Higher expected corrosion rates

Answer 25

D. Higher expected corrosion rates

Question 26

26. Fewer thickness CMLs could be selected for piping systems that have: A. Long straight piping runs B. More potential for localized corrosion C. Processes that have significant variation in feeds D. Corrosion rates exceeding 0.005 ipy

Answer 26

A. Long straight piping runs

Question 27

27. CML's can be eliminated from piping systems only when: A. The probability of failure is extremely low B. The consequence of failure is extremely low C. Either the probability or consequence of failure is extremely low D. Both the probability and consequence of failure is extremely low

Answer 27

C. Either the probability or consequence of failure is extremely low

Question 28

28. Who should be consulted about placement of CML's assigned to a circuit that is subject to localized corrosion or cracking? A. Corrosion specialist B. Piping engineer C. Both Authorized inspector and engineer D. Either authorized inspector or engineer

Answer 28

A. Corrosion specialist

Question 29

29. Profile radiography is preferred when taking thickness measurements on piping: A. ≤ 1/2 NPS B. ≤ 1 NPS C. ≤ 1-1/2 NPS D. ≤ 2 NPS

Answer 29

B. ≤ 1 NPS

Question 30

30. When localized corrosion is suspected, profile radiography is often the preferred NDE method for piping: A. ≤ 3 NPS B. ≤ 8 NPS C. ≤ 12 NPS D.≤ 16 NPS

Answer 30

B. ≤ 8 NPS

Question 31

31. Ultrasonic thickness measurements may need specialized equipment on piping: A. ≤ 1/2 NPS B. ≤ 1 NPS C. ≤ 1-1/2 NPS D. ≤ 2 NPS

Answer 31

D. ≤ 2 NPS

Question 32

32. Thickness readings are taken using UT. Above what temperature should special procedures be used in order to ensure accurate readings? A. 150°F B. 250°F C. 400°F D. 500°F

Answer 32

A. 150°F

Question 33

33. The NDE Method called alternating current flux leakage is useful in finding:(open book) A. MIC damage B. Porosity in weld C. Subsurface cracks D. Surface breaking cracks

Answer 33

D. Surface breaking cracks

Question 34

34. The NDE method called Guided Wave examination is useful for detecting: A. Cracking. B. Wall loss C. Shallow pits D. Spalled factory

Answer 34

B. Wall loss

Question 35

35. CUI can be a major issue on insulated carbon steel piping systems operating between: A. 25–250°F B. 10–350°F C. 40–125°F D. 120–400°F 

Answer 35

B. 10–350°F

Question 36

36. Which document provides details about CUI? A. API 577 B. API 583 C. NACE 651 D. NACE 2201

Answer 36

B. API 583

Question 37

37. Which of the following is NOT a NDE technique used to locate CUI damage? A. Acoustic emission B. Guided wave examination C. Pulsed Eddy current D. Real- time radiography

Answer 37

A. Acoustic emission

Question 38

38. Mixing points should always be: A. Inspected similar to the most corrosive of the two process streams joined B. Inspected similar to injection points C. Set up as a separate piping circuit D. Reviewed to determine if corrosion might be more severe than either of the two joined process streams

Answer 38

D. Reviewed to determine if corrosion might be more severe than either of the two joined process streams

Question 39

39. Injection points that are susceptible to localized corrosion should be: A. Inspected every 5 years B. Inspected the lesser of 1/2 life or 5 years C. Set up as a separate piping circuit D. 100% radiographed or UT scanned

Answer 39

C. Set up as a separate piping circuit