API 570 - Mockup OP - Paper 2 + M

1)

API 570 Authorized Piping Inspector Preparatory Program

* Open Book Mockup Examination- Paper 2 *

Instructions : Refer Applicable ASME/API documents.

1. What the MAWP is recalculated, the wall thickness used shall be the actual thickness minus:

1. The estimated corrosion loss before the date of the next inspection

2. Twice the estimated corrosion loss before the date of the next inspection

3. Three times the estimated corrosion loss before the date of the next inspection

4. The estimated corrosion loss before the date of the next inspection

2. The base metal is P No.1, the weld metal is A No.1, and the wall thickness is 7/8. What is the holding time at 1100-1200F for heat treatment

1. 1 hour

2. 2 hours

3. 3 hours

4. Procedure is not required for this thickness

3. What is the required thickness of straight run pipe subject to internal pressure only, based on the following conditions: NPS 14, SA 285 Gr.C, EFW Spiral seam (No radiography), operating at 216 psi / 378F

1. 0.11

2. 1.1

3. 0.06

4. Not enough information given

4. The radiograph of a Normal Fluid service piping weld revealed a crack. What is the acceptable crack length if the pipe wall was 0.375?

1. None

2. T/3

3. 3/16"

4. Cracks will not show on radiographs

5. Geometric unsharpness of the radiograph of a component under 2" th1ck shall not exceed _________

a. 0.020"

b. 0.030"

c. 0.040"

d. 0.050"

(API-570-Mockup2-OB) 2/10

6. What is the maximum Brinell hardness of base metal P-6?

1. 241

2. 270

3. 281

4. not specified

7. What is the minimum holding time of SA-106 Grade B, 1 inch thick material?

1. 2.4 hours

2. 2 hours

3. 1 hour

4. not specified

8. What is the working pressure of a 150 Ib. flange, SA 350 Gr.LF6 CL 1, used at 400F?

1. 230 psig

2. 200 psig

3. 170 psig

4. 140 psig

9. What is the minimum class flange that can be used if the material is SA 351 Gr.C F8C, temperature 950F and working pressure is 1930 psig

1. 800

2. 900

3. 1500

4. This material can not be used at this temperature

10. The preheat zone shall extend beyond each edge of a pipe weld

1. 1

2. 2

3. 2T

4. 3T

11. What is the root face limitation as listed on the attached WPS and PQR

1. 3/32

2. 1/8

3. No limit

4. Not designated


12. If the supporting PQR is used, are the P-nos correct on the attached WPS?

1. Yes

2. No

3. Could be if properly preheated

4. Not enough information

13. Is the thickness range on the WPS supported by the PQR?

1. Yes

2. No

3. Re qualification is required by API 570

4. Re qualification is required by ASME Section V

14. Is the attached PQR properly qualified?

1. No, because RT is not allowed during PQR qualification

2. No, because there are not enough tensile tests

3. No, because peening is allowed by ASME B31.3

4. Yes

15. What should have been the correct number and type of guide bends on the PQR?

1. 6 side bends

2. 2 face and 2 root bends

3. 1 side, 1 face and 1 root bend

4. No side bends required

16. PWHT is required for all thicknesses of piping over inch for which

of the following materials?

1. P Nos. 1 and 2

2. P Nos. 1 and 3

3. P Nos. 2 and 3

4. P Nos. 4 and 5

17. NPS 12, Sch 80 and Sch 160 pipes (M.O.C = A 106 gr B) are to be used at 10 C. Determine whether,

1. Both pipes require impact testing

2. Only Sch 160 will require impact test but Sch 80 would be exempt.

3. Both would be exempt

4. Sch 80 would require but Sch 160 will be exempt.


18.A 6 NB Sch 40 pipe is selected for following conditions.

Design Pr = 360 psi

Design Temp. = 300 degrees F

M.O.C. = A 53 gr B (ERW)

Corrosion Allowance = 2.0 mm

Assume standard mill tolerance

Your assessment is:

1. Pipe design meets code requirement

2. Pipe design does not meet code requirement

3. Depends on opinion of Piping Inspector

4. Depends on opinion of Piping Design Engineer

19.A piping installation was constructed out of material requiring impact testing. Following two steel materials (material A and B) were tested for impact test results. These materials are to be used for repair work on piping. The test data is as follows:

Material A:Material B:

SMTS = 65000 psi (Deoxidized)

Reading for specimen (1) = 16.0 ft lb


Reading for specimen (3) = 9.5 ft lb SMTS = 60,000 psi (Deoxidized)




1. Both material (A) and (B) are OK

2. (A) is OK but (B) is not OK

3. (B) is OK but (A) is not OK

4. Both are not OK

20. An austenitic stainless steel piping system operates between temperatures of 50 oF and 350 oF .The temperature of installation was 100 oF. The approximate values of minimum expansion and contraction range for sliding support installed at 150 ft from the anchored end will respectively be:

1. 2.4 inch and 4.3 inch



4. None of the above

21. A Flat plate (without joints) is used as permanent blank for flanged point with gasket I.D = 200 mm Design pr. = 200 psi. and safe stress value for plate is 18,000 psi, for given temperature of 250oC. what shall be the minimum blank thickness from given options. Corrosion allowance is Nil code of construction B 31.3 8 mm 1.10 mm

2.12 mm

3.14 mm


22. A 106 gr B pipe after installation, required Hydrostatic leak test. Following data is presented Design pr = 300 psi, Design temp = 500F. Considering stress at design as well as ambient temperature determine correct hydrotest pr. If test is carried out at ambient conditions.

1.450 psi

2.476 psi

3.330 psi

4.375 psi

23. Calculate pneumatic test pressure for above piping considering stress correction.

1.349 psi

2.396 psi

3.408 psi

4.330 psi

24.Maximum Brinell hardness observed (after PWHT) on following three points was as follows:

Joint 1: MOC = PNO4, thk = 16mm, Hardness = 240 HB

Joint 2: MOC = PNO5, thk = 16mm, Hardness = 238 HB

Joint 3: MOC = PNO3, thk = 20 mm, Hardness = 228 HB

Your assessment is:

1. All joints are okay as per ASME B 31.3

2. Joint 2, and 3 are okay, joint 1 not okay

3. Only joint 1 is okay. Joint 2, and 3 are not.

4. None of the above are correct answers.

25.Identify incorrect statement/s:

1. In impact test exemption curves, curve D represents better

toughness material than curve B

2. curve C represents more brittle material than Curve B

3. Fully de-oxidized steels are tougher than non-deoxidized materials

4. 1 and 3

26.An ASTM A53 Grade B pipe with a maximum wall thickness of 0.75 is being considered for use in a cold service. What minimum temperature can it be used and not have an impact test?

1. +20 degrees F

2. +15 degrees F

3. +10 degrees F

4. 0 degrees F


27.Which of the following fluid services or classes of piping are excluded from the specific requirements of API 570?

1. Hazardous fluid services below threshold limits defined by jurisdictional requirements

2. Piping or tubing with an outside diameter not exceeding that of NPS

3. Non-metallic piping and polymeric or glass-lined piping

4. All of the above

28.For welding a 6'' NB sch 160 low alloy piping (1 % cr, 1/2% Mo) to (2- Cr 1 Mo) during plant erection, which of the following are applicable. Assume UTS value for both as 70000 psi

1. Preheat at 300 oF min. and PWHT in range 1300 oF 1375 oF

2. No preheating but PWHT in the range 1300 - 1400 oF

3. Preheating at 350 oF min and PWHT in the range 1300 - 1375 oF

4. Preheating at 350 oF and no PWHT

29.PWHT was carried out on 280 welds on pipes of P No 3 material in 2 batches of (A) 200 and (B) 80 respectively. Batch A was carried out in furnace and Batch B by local heat treatment. From batch A, 28 samples and from Batch, 40 samples were tested for Brinnel hardness. And brinnel hardness values were between 208 to 222 HB for batch A while for Batch B it was between 201 to 225 HB.

Your assessment is:

1. Batch A: sample size & hardness both not acceptable

Batch B: sample size & hardness both OK

2. Batch A: sample size & hardness both OK.

Batch B: sample size & hardness both OK

3. Batch A: sample size inadequate but hardness OK

Batch B: sample size adequate but hardness not acceptable

4. Batch A: sample size & hardness both OK

Batch B: sample size inadequate but hardness OK

30.ASTM A 105 flange (300 lb rating) maximum system hydrostatic pressure shall not exceed:

1. 600 psi

2. 450 psi

3. 1110 psi

4. 1125 psi


31.Suitable rating for pipe flanges (A105) for Design pr = 400 psi , design temp = 400 oF will be

1. 600 lb min.

2. 300 lb min

3. 400 lb min


32.A carbon steel ASTM A 53 Grade B material is being impact tested. What is the minimum energy requirement for this material (average for 3 specimens-fully deoxidized steel)?

1. 7 ft-lbs

2. 10 ft-lbs

3. 13 ft-lbs

4. 15 ft-lbs

33.Where the design temperature of the system is the same as the hydrostatic test temperature, the hydrostatic test pressure shall not be less than: (Yield stress during hydrotest is not governing factor.)

1. that calculated according to ASME Sec. VIII Code

2. 1.1 times the design pressure

3. 1.25 times the operating pressure

4. 1.5 times the design pressure

34.What is the longitudinal weld joint factor, Ej, for API 5L ERW (Electric Resistance Welded) pipe?

1. 1.00

2. 0.95

3. 0.85

4. 0.60

35.S is defined as the stress value for material from Table A-1 of ASME B31.3. Pick the value of S when the material is ASTM A335 Grade P5 and the temperature is 950 degrees F.

1. 11,400 psi

2. 10,600 psi

3. 8,000 psi

4. 20,00 psi


36.The recommended downstream limit of circuit of an injection point is a minimum of:

1. second change in flow direction past the injection point, or 25 feet beyond the first change in flow direction whichever is less

2. second change in flow direction past the injection point, or 25 feet beyond the first change in flow direction whichever is greater

3. second change in flow direction past the injection point, or 25

inches beyond the first change in flow direction whichever is less

4. second change in flow direction past the injection point, or 25

inches beyond the first change in flow direction whichever is greater

37. For external inspections for potential corrosion under insulation (CUI) on Class 1 systems, the examination should include at least ___________ percent of all suspect areas and ___________ percent of all areas of damaged insulation:

1. 50, 75

2. 50, 33

3. 75, 50

4. 25, 10

38.For Class 2 piping, the extent of CUI inspections on a system operating at 45F will be:

1. 75 % of damaged areas, 50 % of suspect areas

2. 50 % of suspect areas, 33 % of damaged areas

3. 33 % damaged areas, 50 % of suspect areas


39.In the Barlow formula for determining pipe thickness, the term S stands for:

1. internal design gage pressure of the pipe in psi

2. pressure design strength for internal pressure, in inches

3. allowable unit stress at the design temperature, in psi

4. maximum strain at the average operating temperature, in psi

40.Determine the linear expansion (in/100 ft) of a carbon steel pipe between 70 degrees F and 450 degrees F

1. 3.04 per 100 ft

2. 3.39 per 100 ft

3. 2.93 per 100 ft

4. 3.16 per 100 ft


41.A 20 long carbon steel pipe is heated uniformly to 450 degrees F. from 70 degrees F. Determine its length after heating.

1. 20.052

2. 20.263

3. 20.210

4. 20.250

42.As per API 570, in case of normal uniform corrosion, compared to other piping. The thickness measurements on valves:

1. Must be routinely taken at same frequency while inspecting, other piping components as valve thickness is less than other piping components

2. Must be routinely taken at twice the frequency as other piping components as valves are very critical components and essential for reliable operation.

3. Are not routinely taken unless unusual corrosion pattern and thinning is observed during servicing and repair.

4. Are routinely at twice the frequency of other components because valves are more expensive items compared to rest of the piping and must be more frequently checked.

43.The UT thickness measurements for pipes at elevated temperatures, the readings generally are corrected using thickness correction tables, because the readings are normally

1. Higher than actual thickness

2. Lower than actual thickness

3. Temperature has no effect on the UT readings

4. Whether readings will be higher or lower depends on the UT examiners skill

44.Certain areas and types of piping systems are potentially more susceptible to corrosion under insulation. Which of the items listed is not susceptible to CUI ?

1. Areas exposed to mist over-spray from cooling water towers

2. Carbon steel piping systems that normally operate in-service above 250 degrees but are in intermittent service

3. Deadlegs and attachments that protrude from insulated piping

4. Carbon steel piping systems, operating between 2500F and 6000 F

45.Environmental cracking of austenite stainless steels is caused many times by:

1. exposing areas to high-velocity and high-turbulence streams

2. excessive cyclic stresses that are often very low

3. exposure to chlorides from salt water, wash-up water, etc.

4. creep of the material by long time exposure to high temperature and stress


46. An eight-inch diameter piping system is installed in December 1979. The installed thickness is measured as 0.34. The minimum thickness of the pipe is 0.20. It is inspected in Dec/83 and the thickness is found to be 0.32. An inspection Dec/87 reveals a loss of 0.01 from the 12/85 inspection was during Dec/89 the thickness was found to be 0.29. The last inspection was during Dec/95 and the thickness was found to be 0.26. What is the long-term corrosion rate of this system?

1. 0.005/year

2. 0.0075/year

3. 0.00375/year

4. 0.0025/year

47Using the information in question above, calculate the short-term corrosion rate.

1. 0.005/year

2. 0.0075/year

3. 0.00375/year

4. 0.0025/year

48.Using the short-term corrosion rate in questions above, determine the remaining life of the system.

1. 18 years

2. 15 years

3. 12 years


49.Preheating to not less than___________ degrees F may be considered as an alternative to post weld heat treatment for alterations or repairs of P-1, piping initially post weld heat treated as a code requirement (may not be used if the piping was post weld heat treated due to environmental cracking prevention).

1. 150

2. 200

3. 300

4. 350

50. If an intelligent pigging system is used to inspect buried piping, what type of bends are usually required in the piping system?

1. Five diameter bends

2. 90 degree pipe bends

3. Ten diameter bends

4. Three diameter bends

-0-0-0-0-0-

API 570 Authorized Piping Inspector Preparatory Program

* API 570 - Open Book Mockup - 2 *

MASTER

QAQA

1. 226. 3 ?

2. 127. 4

3. 128. 3

4. 129. 4

5. 130. 4

6. 131. 2

7. 332. 3

8. 233. 4

9. 334. 3

10. 135. 3

11. 436. 1

12. 237. 1

13. 238. 4

14. 239. 3

15. 440. 4

16. 441. 1

17. 242. 3

18. 143. 1

19. 344. 4

20. 245. 3

21. 246. 1

22. 247. 1

23. 148. 3

24. 449. 3

25. 250. 1

-0-0-0-0-0-

Solution

16.Ref: B 31. 3, Table 331.1.1, Page 69

Correct answer: d

17.12 Sch 80 pipe, thk = 17.45 mm

12 Sch 160 pipe, thk = 33.32 mm

A 106 Gr B is Curve B material.

Ref. Fig. 323.2.2A,

Combination of 10oc and 17.45 mm is above curve B

(Refer Table 323.2.2A for correct reading)

Combination of 10oc and 33.32 is below curve B

12 Sch 80 No impact test

12 Sch 160 Require impact test

Correct answer: b

18.tm =

s = 20000 psi, E = 0.85

D= 168.28 mm, Y=0.4

=

= 1.77+2

= 3.77

tord =

Thk of 6 Sch 40 = 7.11 . . . safe

Correct answer: a

19.Material A

Average of 3 =

Value of 1 is 9.5 ft lb < 10 ft lb ____ not .

Material B

Average of 3 = _____.

Value of 1 is 10 ft lb_____.

Correct answer: c

20. Nett Expansion for 350F} = Exp. up to 350F exp. up to 100F

= 3.2- 0.34 = 2.86

For 150 feet, Total Expansion = 1.5x2.86=4.29 4.3

Nett expansion for -50F = ( Exp. up to 50F)-(Exp. up to 100F)

= - 1.24 0.34

= - 1.58. Negative sign means it is actually

contraction

For 150 feet, Total Contraction = 1.5x1.58 = 2.37 2.4

Correct answer: b

21.tm= + C

= + 0

= 9.12 mm

say 10 mm

Correct answer: b

22.Pt = 1.5 x P x

= 1.5 x 300 x

Correct answer: b

23.Pneumatic pr. = 1.1 x 300 x

Correct answer: a

24.P No. 4

Hardness required 225 HB max.

P No. 5

Hardnessrequired 241 HB max.

P No. 3

Hardnessrequired 225 HB max.

Correct answer: d

25.Correct answer: b(incorrect answer)

Actually, B is tougher than A

C is tougher than A and B

D is tougher than A, B and C

-0-0-0-0-0-

_1156399207.unknown

_1156419861.unknown

_1162278861.unknown

_1162278863.unknown

_1156399604.unknown

_1156399798.unknown

_1156399217.unknown

_1156399167.unknown

_1156398683.unknown

_1156399048.unknown

_1156397900.unknown

_1156397986.unknown

Documents

API 570 - Mockup OP - Paper 2 + M