API 510 ACTUAL EXAM QUESTIONS
AND VERIFIED ANSWERS ALL
CORRECT
What must a SV repair organization have? - Answer-Quality assurance system and a
documented training program.
When are balanced bellows safety relief valves used? - Answer-When there is a high
back pressure at the discharge of the valve.
Can a rupture disc be used downstream of safety relief valves? - Answer-Yes.
When would a rupture disc be used? - Answer-In corrosive service, fouling service, or if
a faster response is needed.
What is the main cause for SV's to malfunction? - Answer-Corrosion.
What are the two main causes for SV springs to malfunction? - Answer-Corrosion and
the wrong spring for high temperature service.
Can eddy current be used to detect sub surface defects? - Answer-It can detect SOME
sub surface discontinuities of round objects like tubes and bar stocks.
Can eddy current be used to determine thicknesses of coatings, non conductive surface
coatings, and thicknesses of claddings? - Answer-Yes.
Is eddy current more sensitive with discontinuities perpendicular or parallel to the
currents? - Answer-Perpendicular.
Does the coating need to be removed to inspect a part with ACFM? - Answer-No.
Does the ACFM probe need to touch the surface of the material? - Answer-No.
Can ACFM be used to inspect complex geometries like nozzles, ring grooves, and
ground out areas? - Answer-Yes.
When is the pilot operated valve used? - Answer-Low differential between set pressure
and operating pressure, large relief area required or very high set pressures, very low
set pressures, local sensing of pressure and remote discharge.
,When an MT applicator is qualified using overhead technique, what positions are they
qualified for? - Answer-All positions.
Where would you find the definition of an alteration? - Answer-In API 510 paragraph
3.1.1
Where would you find the information about responsibilities before entering a vessel? -
Answer-In API 510, paragraph 5.3.3
What will cause sub-surface cracking? - Answer-Hydrogen-induced cracking and wet
hydrogen sulfide cracking (API 510, paragraph 5.4.1(c)).
What damage mechanisms cause metallurgical changes? - Answer-Graphitization,
temper embrittlement, and hydrogen embrittlement (API 510, paragraph 5.4.1(e)).
At what temperature will low-alloy steels experience a reduction in toughness? -
Answer-At temperatures above 650° F (API 510, paragraph 3.1.69).
What damage mechanism causes macro cracking? - Answer-HTHA (High temperature
hydrogen attack (API 510, paragraph 5.4.1(d))).
Alteration - Answer-Physical change in any component that has design implications
affecting pressure containing ability beyond the scope described in existing data
reports.
What are NOT considered "alterations?" - Answer-Any comparable or duplicate
replacement, the addition of any reinforced nozzle less than or equal to the size of
existing reinforced nozzles, and the addition of nozzles not requiring reinforcement.
Inspection - Answer-The external, internal, or on-stream evaluation of the condition of a
vessel conducted by the authorized inspector or his/her designee in accordance with
API 510 code.
Examination - Answer-Process by which an examiner or inspector investigates a
component using NDE in accordance with approved NDE procedures
Major Repair - Answer-Any work not considered an alteration that removes and
replaces a major part of the pressure boundary other than a nozzle.
When does a major repair classify as an alteration? - Answer-When any restorative
work results in a change to the design temperature, MAT, or MAWP. Requirements for
re-rating shall be satisfied.
What is low-alloy steel? - Answer-Family of steels containing up to 9% chromium and
other alloying additions for high temperature strength, and creep resistance.
, What are some low-alloy steels commonly encountered in refining? - Answer-C-0.5Mo,
Mn-0.5Mo, 1Cr-0.5Mo, 1.25Cr-0.5Mo, 2.25Cr-1.0Mo, 5Cr-0.5Mo, and 9Cr-1Mo. These
are considered ferritic steels.
What constitutes a nickel-based alloy? - Answer-An alloy with >30% Nickel. Some
alloys include 200, 400, K-500, 800, 800H, 825, 600H, 617, 625, 718, X-750, and C276.
Imperfection - Answer-Flaws or other discontinuities noted during inspection or
examination that may or may not exceed the applicable acceptance criteria.
Indication - Answer-A response or evidence resulting from the application of an NDE
that may be non relevant, flawed, or defective upon further analysis. (A signal of a
discontinuity in the material)
Defect - Answer-Discontinuity(s) that render a part or product unable to meet minimum
applicable acceptance standards or specifications. Designates rejectability.
Flaw - Answer-Imperfection or other discontinuity noted during inspection that may or
may not exceed the applicable acceptance criteria. (An undesirable discontinuity.)
Inclusion - Answer-Entrapped foreign solid material, such as slag, flux, tungsten, or
oxide.
Artifact - Answer-Indications on radiographic film that may be caused by damage to the
film before, during, or after processing.
Discontinuity - Answer-Interruption of the typical structure of a material, such as a lack
of homogeneity in its mechanical, metallurgical, or physical characteristics.
Where would you find the thickness calculations for a shell? - Answer-UG-27(c)(1)
Where would you find the thickness calculations for a sphere? - Answer-UG-27(d)
Where would you find external pressure calculations? - Answer-UG-28(c)
Where would you find reinforcement calculations? - Answer-UG-37
Where would you find out-of-roundness limits? - Answer-UG-80
Where would you find information on Charpy impact test specimens? - Answer-UG-84
Where would you find information on MAWP? - Answer-UG-98
Where would you find information on hydrostatic testing? - Answer-UG-99
AND VERIFIED ANSWERS ALL
CORRECT
What must a SV repair organization have? - Answer-Quality assurance system and a
documented training program.
When are balanced bellows safety relief valves used? - Answer-When there is a high
back pressure at the discharge of the valve.
Can a rupture disc be used downstream of safety relief valves? - Answer-Yes.
When would a rupture disc be used? - Answer-In corrosive service, fouling service, or if
a faster response is needed.
What is the main cause for SV's to malfunction? - Answer-Corrosion.
What are the two main causes for SV springs to malfunction? - Answer-Corrosion and
the wrong spring for high temperature service.
Can eddy current be used to detect sub surface defects? - Answer-It can detect SOME
sub surface discontinuities of round objects like tubes and bar stocks.
Can eddy current be used to determine thicknesses of coatings, non conductive surface
coatings, and thicknesses of claddings? - Answer-Yes.
Is eddy current more sensitive with discontinuities perpendicular or parallel to the
currents? - Answer-Perpendicular.
Does the coating need to be removed to inspect a part with ACFM? - Answer-No.
Does the ACFM probe need to touch the surface of the material? - Answer-No.
Can ACFM be used to inspect complex geometries like nozzles, ring grooves, and
ground out areas? - Answer-Yes.
When is the pilot operated valve used? - Answer-Low differential between set pressure
and operating pressure, large relief area required or very high set pressures, very low
set pressures, local sensing of pressure and remote discharge.
,When an MT applicator is qualified using overhead technique, what positions are they
qualified for? - Answer-All positions.
Where would you find the definition of an alteration? - Answer-In API 510 paragraph
3.1.1
Where would you find the information about responsibilities before entering a vessel? -
Answer-In API 510, paragraph 5.3.3
What will cause sub-surface cracking? - Answer-Hydrogen-induced cracking and wet
hydrogen sulfide cracking (API 510, paragraph 5.4.1(c)).
What damage mechanisms cause metallurgical changes? - Answer-Graphitization,
temper embrittlement, and hydrogen embrittlement (API 510, paragraph 5.4.1(e)).
At what temperature will low-alloy steels experience a reduction in toughness? -
Answer-At temperatures above 650° F (API 510, paragraph 3.1.69).
What damage mechanism causes macro cracking? - Answer-HTHA (High temperature
hydrogen attack (API 510, paragraph 5.4.1(d))).
Alteration - Answer-Physical change in any component that has design implications
affecting pressure containing ability beyond the scope described in existing data
reports.
What are NOT considered "alterations?" - Answer-Any comparable or duplicate
replacement, the addition of any reinforced nozzle less than or equal to the size of
existing reinforced nozzles, and the addition of nozzles not requiring reinforcement.
Inspection - Answer-The external, internal, or on-stream evaluation of the condition of a
vessel conducted by the authorized inspector or his/her designee in accordance with
API 510 code.
Examination - Answer-Process by which an examiner or inspector investigates a
component using NDE in accordance with approved NDE procedures
Major Repair - Answer-Any work not considered an alteration that removes and
replaces a major part of the pressure boundary other than a nozzle.
When does a major repair classify as an alteration? - Answer-When any restorative
work results in a change to the design temperature, MAT, or MAWP. Requirements for
re-rating shall be satisfied.
What is low-alloy steel? - Answer-Family of steels containing up to 9% chromium and
other alloying additions for high temperature strength, and creep resistance.
, What are some low-alloy steels commonly encountered in refining? - Answer-C-0.5Mo,
Mn-0.5Mo, 1Cr-0.5Mo, 1.25Cr-0.5Mo, 2.25Cr-1.0Mo, 5Cr-0.5Mo, and 9Cr-1Mo. These
are considered ferritic steels.
What constitutes a nickel-based alloy? - Answer-An alloy with >30% Nickel. Some
alloys include 200, 400, K-500, 800, 800H, 825, 600H, 617, 625, 718, X-750, and C276.
Imperfection - Answer-Flaws or other discontinuities noted during inspection or
examination that may or may not exceed the applicable acceptance criteria.
Indication - Answer-A response or evidence resulting from the application of an NDE
that may be non relevant, flawed, or defective upon further analysis. (A signal of a
discontinuity in the material)
Defect - Answer-Discontinuity(s) that render a part or product unable to meet minimum
applicable acceptance standards or specifications. Designates rejectability.
Flaw - Answer-Imperfection or other discontinuity noted during inspection that may or
may not exceed the applicable acceptance criteria. (An undesirable discontinuity.)
Inclusion - Answer-Entrapped foreign solid material, such as slag, flux, tungsten, or
oxide.
Artifact - Answer-Indications on radiographic film that may be caused by damage to the
film before, during, or after processing.
Discontinuity - Answer-Interruption of the typical structure of a material, such as a lack
of homogeneity in its mechanical, metallurgical, or physical characteristics.
Where would you find the thickness calculations for a shell? - Answer-UG-27(c)(1)
Where would you find the thickness calculations for a sphere? - Answer-UG-27(d)
Where would you find external pressure calculations? - Answer-UG-28(c)
Where would you find reinforcement calculations? - Answer-UG-37
Where would you find out-of-roundness limits? - Answer-UG-80
Where would you find information on Charpy impact test specimens? - Answer-UG-84
Where would you find information on MAWP? - Answer-UG-98
Where would you find information on hydrostatic testing? - Answer-UG-99
