API 510 Chapter 17

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.


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?



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



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



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



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



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



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



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?




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



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?



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



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)?



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



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



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



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



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



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?



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?



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:



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



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



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?



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



Question 25
What are HIC cracks likely to look like?



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



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



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?



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



Question 30
CMLs should be distributed:


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