API 510 Practice Test Questions
with All Correct Answers
What form of NDE may not be effective for finding tight, scale filled cracks and should
not be used as the only means of detection for Caustic Stress Corrosion Cracking?
API 571 4.5.3.7 - Answer-PT
A welding technique where the heat and placement of weld passes in deposited weld
layers is controlled so that sufficient heat is provided to temper each previously
deposited weld layer is known as:
API 577 3.1.65 - Answer-Temper Bead Welding.
What materials are highly resistant but not immune to Cl SCC?
API 571 4.5.1.2 - Answer-Nickel base alloys.
In brittle fracturing where can the fine shear lips be found?
API 571 4.2.7.5 - Answer-Along the free edge of the fracture, or localized
necking around the crack.
The next planned examination of a pressure vessel shall include all CMLs that have the:
API 510 5.6.2.1 - Answer-Highest corrosion rates and least remaining life.
If a welder has qualified in the shielded metal arc welding, submerged arc welding, and
gas tungsten arc welding process but has welded in only one of them, qualification for
the other two processes remains valid:
ASME SEC 9 QW-322.1 - Answer-6 months
One purpose of reviewing previous inspection reports is to ensure that:
API 510 7.1.2
* - Answer-Estimated corrosion rates for new equipment are accurate.
A vessel has a single corrosion rate of 10 mils per year. The minimum vessel required
thickness for both the shell and the heads is 0.75 inch. The actual thickness of the
heads is 0.95 inch and the shell is 0.90 inch. What is the vessel's remaining life?
API 510 7.2.1 - Answer-15 yrs
Following the alteration of a 1 1/2 inch-thick vessel, a hydrostatic test is performed. To
minimize the risk of brittle fracture, metal temperature during hydrostatic tests should be
at least:
API 5.8.7.2 - Answer-10 °F (6 °C) above the MDMT or MAT
with All Correct Answers
What form of NDE may not be effective for finding tight, scale filled cracks and should
not be used as the only means of detection for Caustic Stress Corrosion Cracking?
API 571 4.5.3.7 - Answer-PT
A welding technique where the heat and placement of weld passes in deposited weld
layers is controlled so that sufficient heat is provided to temper each previously
deposited weld layer is known as:
API 577 3.1.65 - Answer-Temper Bead Welding.
What materials are highly resistant but not immune to Cl SCC?
API 571 4.5.1.2 - Answer-Nickel base alloys.
In brittle fracturing where can the fine shear lips be found?
API 571 4.2.7.5 - Answer-Along the free edge of the fracture, or localized
necking around the crack.
The next planned examination of a pressure vessel shall include all CMLs that have the:
API 510 5.6.2.1 - Answer-Highest corrosion rates and least remaining life.
If a welder has qualified in the shielded metal arc welding, submerged arc welding, and
gas tungsten arc welding process but has welded in only one of them, qualification for
the other two processes remains valid:
ASME SEC 9 QW-322.1 - Answer-6 months
One purpose of reviewing previous inspection reports is to ensure that:
API 510 7.1.2
* - Answer-Estimated corrosion rates for new equipment are accurate.
A vessel has a single corrosion rate of 10 mils per year. The minimum vessel required
thickness for both the shell and the heads is 0.75 inch. The actual thickness of the
heads is 0.95 inch and the shell is 0.90 inch. What is the vessel's remaining life?
API 510 7.2.1 - Answer-15 yrs
Following the alteration of a 1 1/2 inch-thick vessel, a hydrostatic test is performed. To
minimize the risk of brittle fracture, metal temperature during hydrostatic tests should be
at least:
API 5.8.7.2 - Answer-10 °F (6 °C) above the MDMT or MAT
