API 510 Chapter 17 -Thirty Open-Book Sample Questions

Try these questions, using all of the codes specified in the API 510 exam ‘effectivity list’. There is little point in guessing the answers – the objective is to see where the answers come from in the codes, thereby increasing your familiarity with the content.

Take a Free API 510 Exam Chapter 17 Practice test with Latest Thirty Open-Book Sample Question and Answers

Question 1
A vessel is constructed to a pre-1999 version of the ASME
construction code. Can it be re-rated to the 1999 version?

(a) No, under no circumstances does API 510 allow it

(b) Yes, if it is re-tested to 130 % MAWP corrected for temperature

(d) Yes, without restriction

Question 2
The API philosophy is that temporary repairs should be replaced with permanent repairs

(a) Within 12 months

(b) At the next available maintenance opportunity

(d) At the next internal inspection

Question 3
A procedure is qualified using base material with an S-number.
Which of the following statements is true?

a) This qualifies corresponding S-number materials only

b) This qualifies corresponding F-number materials

c) This qualifies corresponding P-number materials only

d) This qualifies both P-number and S-number materials

Question 4
Which of the following NDE methods would be unlikely to find an edge-breaking lamination in a weld joint

(a) MT

(b) PT

(d) UT

Question 5
The inspection interval for all PRVs is determined by:

(a) The inspector

(b) The engineer

(d) Any of the above

Question 6
Who decides the corrosion rate that best reflects current process conditions

(a) The inspector

(b) The corrosion specialist

(d) The owner/user (in the written scheme of examination)

Question 7
Providing certain conditions are met, a vessel may be re-rated to:

(a) Its original construction code only

(b) Its original construction code and the later edition of the construction code

(d) The ASME code only

Question 8
Thickness data for a pressure vessel are provided as follows:
Minimum (calculated) thickness = 0.125 in
Current measured thickness = 0.25 in
Measured thickness 4 years ago = 0.50 in
What are the remaining life and the inspection period of the vessel?

(a) 4 years, 2 years

(b) 4 years, 4 years

(d) None of the above

Question 9
Weld repairs to existing stainless steel overlay or clad areas
should consider:

(a) The problem of local softening

(b) The problem of martensite formation

(d) The possibility of increased corrosion rates after the repair is completed

10.

Question 10
A pressure vessel has the following data:
. Nameplate stamping RT-2
. MAWP = 280 psig at 690 °F
. S = 13 350 psi
. Actual shell thickness = 0.475 in
. ID = 78.5 in
. Welded joints are all type 1
What is the minimum safe shell thickness to support the rated MAWP of 280 psi?

(a) Approximately 0.83 in

(b) Approximately 1.10 in

(d) Approximately 0.89 in

11.

Question 11
For vessels susceptible to brittle fracture, what additional tests should the inspector specifically consider after repair welding is completed?

(a) Additional volumetric NDE

(b) Additional surface NDE

(d) Shear wave (angle probe) UT

12.

Question 12
A vessel has the following data:
. Elliptical heads joined to the shell by type 1 joints (Cat B) with full RT
. Head ID = 52 in
. Thickness at the knuckle (corroded) = 0.28 in
. S = 13 800 psi
What is the safe MAWP of this head (ignoring any static pressure consideration)?

a) 137 psi

b) 148 psi

c) 175 psi

d) 190 psi

13.

Question 13
For a vessel that has no nameplate, the inspector should specify that a new nameplate is fitted showing:

(a) Maximum and minimum allowable temperature, MAWP, and date

(b) MAWP, MDMT, and construction code

(d) All of the above plus the ASME U-stamp

14.

Question 14
RBI assessment should be thoroughly documented in accordance with:

(a) API 580 section 10

(b) API 580 section 16

(d) All of the above

15.

Question 15
In API 510, sulphidation is classed as a DM resulting in:

(a) General/local metal loss

(b) Surface connected cracking

(d) Blistering

16.

Question 16
Which of these is not a material verification (PMI) technique that can be used on-site?

(a) Spectrographic analysis

(b) Metallographic replication

(d) Spark testing

17.

Question 17
Plain carbon and other ferritic steels may be in danger of brittle fracture at:

a) Above 380 °C

b) 60–120 °C

c) Ambient temperature

d) None of the above

18.

Question 18
A vessel constructed of material with a thickness of 0.50 in and UTS of 75 000 psi is to be weld-repaired using weld consumables with UTS of 60 000 psi. If the depth of the weld repair is 0.2 in, what is the total required thickness of the weld deposit?

(a) 0.16 in

(b) 0.20 in

(d) 0.275 in

19.

Question 19
A vessel is made from a carbon steel plate (UCS-66 curve A) with a design stress of 17 500 psi. It operates at very low material stress of 100 psi and is made of 1 in the plate that has been spot radiographed. What is the minimum design metal temperature for the material to not require impact testing?

(a) -100 °F

(b) -25 °F

(d) -55 °F

20.

Question 20
It is required to investigate whether a scheduled internal inspection on a multizone vessel (with varying corrosion rates)can be substituted by an on-stream inspection. The inspector should:

(a) Specify an RBI assessment

(b) Take the worst-corroding zone as the reference

(d) Prohibit the substitution as it is not allowed for multizone vessels according to API 510

21.

Question 21
If there is a conflict between the ASME codes and API 510 then:

(a) ASME takes priority

(b) API 510 takes priority

(d) The owner/user shall decide which takes priority

22.

Question 22
A nozzle is fitted abutting (i.e. set-on) the vessel wall. What is an acceptable method of attaching it?

(a) With a full penetration groove weld through the nozzle wall

(b) With a full penetration groove weld through the vessel wall

(d) Both (a) and (c) are acceptable

23.

Question 23
An engineer has passed the NBBPVI inspection examination. Under what conditions can the inspector be awarded an API 510 authorized pressure vessel inspector certificate?

(a) By just proving that he or she meets the API 510 education and experience requirements

(b) By demonstrating a further 1 year’s experience

(d) Only bypassing the API 510 exam

24.

Question 24
A vessel has an inside diameter of 30 inches. What is the maximum allowed averaging length for calculating corroded wall thickness?

(a) 10 in

(b) 15 in

(d) 30 in

25.

Question 25
What are HIC cracks likely to look like?

(a) A spider’s web

(b) A set of stairs

(d) Daggers

26.

Question 26
Which of the following is a commonly accepted advantage of the GMAW process?

(a) It has a high deposition rate compared to SMAW or GTAW

(b) It has the best control of the weld pool of any of the arc processes

(d) It gives deep penetration on thick steels in a short-circuiting transfer

27.

Question 27
How often should an external inspection be performed on an above-ground vessel?

(a) 5 years

(b) 10 years

(d) It depends on the process

28.

Question 28
Which of these vessels in which internal inspection is physically possible, but are in severe corrosive service, may not use an onstream inspection as a substitute for an internal inspection?

(a) The recorded corrosion rate is 0.1 mm/year

(b) The vessel is 3 years old

(d) The vessel has no protective internal lining

29.

Question 29
For a vessel that has no nameplate or design/construction information, a pressure test should be performed:

(a) Immediately

(b) Before any further use of the vessel

(d) As soon as practical

30.

Question 30
CMLs should be distributed:

(a) Appropriately over a vessel

(b) In highly stressed areas

(d) Near areas of past failure

Question 1 of 30

API 510 Chapter 17