API 510 TEST QUESTIONS WITH
CORRECT ANSWERS
A vessel is to undergo a hydrostatic test after an alteration; the test pressure will be 785
psi. Using standard commercially available gauges what is the minimum and maximum
gage pressure range acceptable for this test? - Answer-0-1500 to 0-3000 psi
Which of the following should a progressive record for a pressure vessel contain? -
Answer-Construction and design information, operating and inspection history, repair
alteration and fitness for service
When preforming an external inspection of a vessel, what consideration need be given
the external insulation? - Answer-If insulation is in good condition and the vessel
operates within the high and low temperatures stated in API 510, removal of insulation
is not necessary for inspection
What must be considered important in the inspection of a metallic lining? - Answer-That
there are no holes or cracks present in the lining.
Which is the most severe stress caused by internal pressure in a cylindrical shell? -
Answer-Circumferential stress acting along the longitudinal axis.
Of the following heads; which is normally required to be the thickest all things being
equal? - Answer-Forged flat heads
Unless justified by RBI, the maximum interval between external visual inspections for an
above the ground vessel is: - Answer-5 years
What is the maximum inspection interval for a vessel with a remaining safe operating
life of less than four years? - Answer-The full remaining safe operating life up to a
maximum of 2 years.
What is the maximum allowed time between the testing of pressure relieving devices
per api 519 if it's in a service that promotes fouling of the valve? - Answer-5 years
Who is responsible for the rerating calculations of a section VIII div. 1 vessel? - Answer-
The manufacturer or an owner/user engineer (or his representative)
, If the requirements of an api 510 are met who determines if a temporary fillet weld patch
may be used in a repair? - Answer-An engineer competent in pressure vessel design
and the api authorized inspector
The maximum carbon content of weldable steel per ASME code is? - Answer-.35%
Per API 510 what is the recommended shell temperature during a hydrostatic test of a
vessel 1" thick? - Answer-10 degrees F above MDMT
If you weee looking for the last date that a pressure relief valve was set, where should
this information always be? - Answer-Relief valve tag
In what two ways may the probable corrosion rate for a new vessel be determined
before the first internal inspection? - Answer-From data collected on vessels providing
the same or similar service or from published data on vessels providing comparable
service.
What must be done to avoid pressure testing after the major repair or alteration of a
vessel? - Answer-Make certain it is permitted by jurisdictional rules that may exist and
consult with an engineer experienced in pressure vessel design and the authorized
pressure vessel inspector
If the corrosion rate of a vessel is
determined to be less than a given
amount per year, it is possible to exempt
the vessel from internal inspections.
What is the value of the corrosion rate - Answer-.005" per year
What may happen if vessels are
subjected to temperatures above
design? - Answer-Creep of the vessel's material may occur.
The definition of pressure a
/pressure boundary is: - Answer-The portion of the vessel that contains the pressure
What does the term non-standard
vessel mean? - Answer-•A vessel fabricated to a
recognized construction code
but has lost its nameplate or
stamping.
What Code is used to evaluate a
vessel after it has been placed in
service? - Answer-API 510
CORRECT ANSWERS
A vessel is to undergo a hydrostatic test after an alteration; the test pressure will be 785
psi. Using standard commercially available gauges what is the minimum and maximum
gage pressure range acceptable for this test? - Answer-0-1500 to 0-3000 psi
Which of the following should a progressive record for a pressure vessel contain? -
Answer-Construction and design information, operating and inspection history, repair
alteration and fitness for service
When preforming an external inspection of a vessel, what consideration need be given
the external insulation? - Answer-If insulation is in good condition and the vessel
operates within the high and low temperatures stated in API 510, removal of insulation
is not necessary for inspection
What must be considered important in the inspection of a metallic lining? - Answer-That
there are no holes or cracks present in the lining.
Which is the most severe stress caused by internal pressure in a cylindrical shell? -
Answer-Circumferential stress acting along the longitudinal axis.
Of the following heads; which is normally required to be the thickest all things being
equal? - Answer-Forged flat heads
Unless justified by RBI, the maximum interval between external visual inspections for an
above the ground vessel is: - Answer-5 years
What is the maximum inspection interval for a vessel with a remaining safe operating
life of less than four years? - Answer-The full remaining safe operating life up to a
maximum of 2 years.
What is the maximum allowed time between the testing of pressure relieving devices
per api 519 if it's in a service that promotes fouling of the valve? - Answer-5 years
Who is responsible for the rerating calculations of a section VIII div. 1 vessel? - Answer-
The manufacturer or an owner/user engineer (or his representative)
, If the requirements of an api 510 are met who determines if a temporary fillet weld patch
may be used in a repair? - Answer-An engineer competent in pressure vessel design
and the api authorized inspector
The maximum carbon content of weldable steel per ASME code is? - Answer-.35%
Per API 510 what is the recommended shell temperature during a hydrostatic test of a
vessel 1" thick? - Answer-10 degrees F above MDMT
If you weee looking for the last date that a pressure relief valve was set, where should
this information always be? - Answer-Relief valve tag
In what two ways may the probable corrosion rate for a new vessel be determined
before the first internal inspection? - Answer-From data collected on vessels providing
the same or similar service or from published data on vessels providing comparable
service.
What must be done to avoid pressure testing after the major repair or alteration of a
vessel? - Answer-Make certain it is permitted by jurisdictional rules that may exist and
consult with an engineer experienced in pressure vessel design and the authorized
pressure vessel inspector
If the corrosion rate of a vessel is
determined to be less than a given
amount per year, it is possible to exempt
the vessel from internal inspections.
What is the value of the corrosion rate - Answer-.005" per year
What may happen if vessels are
subjected to temperatures above
design? - Answer-Creep of the vessel's material may occur.
The definition of pressure a
/pressure boundary is: - Answer-The portion of the vessel that contains the pressure
What does the term non-standard
vessel mean? - Answer-•A vessel fabricated to a
recognized construction code
but has lost its nameplate or
stamping.
What Code is used to evaluate a
vessel after it has been placed in
service? - Answer-API 510
