API-510 Closed Book (Verified on test)
questions with complete solutions61
If a welder has qualified in the shielded metal arc welding, submerged arc welding, and gas
tungsten arc welding processes but has welded in only one of them, qualification for the other 2
processes remains valid:
A: for 6 months
B: for 1 year
C: for 2 years
D: Indefinitely - ANSWERS-A: for 6 months
One purpose of reviewing previous inspection reports is to ensure that:
A: Estimated corrosion rates for new equipment are accurate
B: Pressure relief valves have been installed prior to placing the vessel in service
C: Required pressure tests have been preformed
D: Thickness readings have been taken after every 1,000 hours of service - ANSWERS-A:
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". The actual thickness of the heads is 0.95" and the shell
is 0.90". What is the vessel's remaining life?
A: 7.5 years
B: 10 years
C: 15 years
D: 20 years - ANSWERS-C: 15 years
,(.90-.75)/.010=15
A pressure vessel has been in non-continuous service for 15 years. During this time, it has been
filled 3 times for 2 years at a time, then internally inspected. The last internal inspection
determined that the vessel had 9 years of remaining life. The next inspection is due:
A: Before 4.5 years of actual service
B: Before 5 years of actual service
C: Before 7.5 years of actual service
D: Before a maximum of 10 years actual service - ANSWERS-A: Before 4.5 years of actual service
Bulges and buckling in the metallic linings of pressure vessels normally indicate:
A: A leak in the lining or attachment welds
B: Accelerated corrosion of the parent metal
C: That the lining material was not compatible with the process
D: That the oversized lining was installed - ANSWERS-A: A leak in the lining or attachment welds
Increasing the maximum allowable working pressure and/or the temp of a pressure vessel, or
decreasing the temp so that additional Charpy impact testing will be required, is considered
which of the following:
A: A modification
B: A rework
C: An alteration
D: A repair - ANSWERS-C: An alteration
After an alteration to a pressure vessel, a nondestructive examination procedure may be
substituted for a pressure test only when a/an:
A: Authorized inspector has approved the NDE procedure
B: Pressure vessel engineer and an authorized pressure vessel inspector have been consulted
,C: Pressure vessel engineer experienced in pressure vessel design has approved the NDE
procedure
D: Pressure test is not practical - ANSWERS-B: Pressure vessel engineer and an authorized
pressure vessel inspector have been consulted
A plant engineer would like to increase a vessel's operating temp by 100F. The vessel's
nameplate states a maximum allowable working pressure of 250 PSIG at 650F, and the current
operating temp is 600F. What is the 1st step in increasing the operating temp?
A: Perform calculations to determine if the vessel thickness is sufficient
B: Determine a new corrosion rate for the vessel
C: perform an internal inspection of the vessel
D: Determine if the pressure-relief device will be suitable at the new temperature - ANSWERS-A:
Perform calculations to determine if the vessel thickness is sufficient
Following the alteration of a 2.5" thick vessel, a hydrostatic test is performed. To minimize the
risk of brittle fracture, metal temperature during hydrostatic tests should be at least:
A: 10F above the minimum design metal temperature
B: 30F above the minimum design metal temperature
C: 60F
D: 70F - ANSWERS-B: 30F above the minimum design metal temperature
Vessels insulated effectively to preclude the entrance of moisture:
A: may have the external inspection extended to a maximum of 10 years
B: do not need to have insulation removed for the external inspection
C: require a minimum of insulation removed to facilitate the corrosion under insulation
inspection
D: may substitute acoustic emission examination in lieu of stripping insulation - ANSWERS-B: do
not need to have insulation removed for the external inspection
, A crack in a vessel at the cone-to-cylinder juncture can be repaired with approval by the API-
authorized inspector provided that:
A: The weld is fully radiographed
B: The weld is postweld heat-treated
C: The weld is postweld heat-treated and fully examined radiographically
D: An engineer experienced in pressure vessel design is consulted - ANSWERS-D: An engineer
experienced in pressure vessel design is consulted
Which of the following statements is correct with regard to the welder's qualifications for a
minor pressure repair requested by an owner/operator?
A: The welder must be qualified for the applicable process by the company making the repair
B: A welder who is an employee of the owner/operator need not be formally qualified
C: The welder must be qualified by an ASME-Code shop, and be current in the process used for
the repair
D: The weld may use any qualified procedures that are in accordance with the ASME Code,
Section IX. - ANSWERS-A: The welder must be qualified for the applicable process by the
company making the repair
Materials used for making repairs shall be of known weldable quality and shall:
A: Be compatible with the original material
B: Be of known toughness
C: Have a minimum tensile strength of 50,000 psi
D: Have an ASTM specification number - ANSWERS-A: Be compatible with the original material
The springs in pressure-relief valves typically fail due to:
A: Tensile overload
B: Creep
C: Erosion
questions with complete solutions61
If a welder has qualified in the shielded metal arc welding, submerged arc welding, and gas
tungsten arc welding processes but has welded in only one of them, qualification for the other 2
processes remains valid:
A: for 6 months
B: for 1 year
C: for 2 years
D: Indefinitely - ANSWERS-A: for 6 months
One purpose of reviewing previous inspection reports is to ensure that:
A: Estimated corrosion rates for new equipment are accurate
B: Pressure relief valves have been installed prior to placing the vessel in service
C: Required pressure tests have been preformed
D: Thickness readings have been taken after every 1,000 hours of service - ANSWERS-A:
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". The actual thickness of the heads is 0.95" and the shell
is 0.90". What is the vessel's remaining life?
A: 7.5 years
B: 10 years
C: 15 years
D: 20 years - ANSWERS-C: 15 years
,(.90-.75)/.010=15
A pressure vessel has been in non-continuous service for 15 years. During this time, it has been
filled 3 times for 2 years at a time, then internally inspected. The last internal inspection
determined that the vessel had 9 years of remaining life. The next inspection is due:
A: Before 4.5 years of actual service
B: Before 5 years of actual service
C: Before 7.5 years of actual service
D: Before a maximum of 10 years actual service - ANSWERS-A: Before 4.5 years of actual service
Bulges and buckling in the metallic linings of pressure vessels normally indicate:
A: A leak in the lining or attachment welds
B: Accelerated corrosion of the parent metal
C: That the lining material was not compatible with the process
D: That the oversized lining was installed - ANSWERS-A: A leak in the lining or attachment welds
Increasing the maximum allowable working pressure and/or the temp of a pressure vessel, or
decreasing the temp so that additional Charpy impact testing will be required, is considered
which of the following:
A: A modification
B: A rework
C: An alteration
D: A repair - ANSWERS-C: An alteration
After an alteration to a pressure vessel, a nondestructive examination procedure may be
substituted for a pressure test only when a/an:
A: Authorized inspector has approved the NDE procedure
B: Pressure vessel engineer and an authorized pressure vessel inspector have been consulted
,C: Pressure vessel engineer experienced in pressure vessel design has approved the NDE
procedure
D: Pressure test is not practical - ANSWERS-B: Pressure vessel engineer and an authorized
pressure vessel inspector have been consulted
A plant engineer would like to increase a vessel's operating temp by 100F. The vessel's
nameplate states a maximum allowable working pressure of 250 PSIG at 650F, and the current
operating temp is 600F. What is the 1st step in increasing the operating temp?
A: Perform calculations to determine if the vessel thickness is sufficient
B: Determine a new corrosion rate for the vessel
C: perform an internal inspection of the vessel
D: Determine if the pressure-relief device will be suitable at the new temperature - ANSWERS-A:
Perform calculations to determine if the vessel thickness is sufficient
Following the alteration of a 2.5" thick vessel, a hydrostatic test is performed. To minimize the
risk of brittle fracture, metal temperature during hydrostatic tests should be at least:
A: 10F above the minimum design metal temperature
B: 30F above the minimum design metal temperature
C: 60F
D: 70F - ANSWERS-B: 30F above the minimum design metal temperature
Vessels insulated effectively to preclude the entrance of moisture:
A: may have the external inspection extended to a maximum of 10 years
B: do not need to have insulation removed for the external inspection
C: require a minimum of insulation removed to facilitate the corrosion under insulation
inspection
D: may substitute acoustic emission examination in lieu of stripping insulation - ANSWERS-B: do
not need to have insulation removed for the external inspection
, A crack in a vessel at the cone-to-cylinder juncture can be repaired with approval by the API-
authorized inspector provided that:
A: The weld is fully radiographed
B: The weld is postweld heat-treated
C: The weld is postweld heat-treated and fully examined radiographically
D: An engineer experienced in pressure vessel design is consulted - ANSWERS-D: An engineer
experienced in pressure vessel design is consulted
Which of the following statements is correct with regard to the welder's qualifications for a
minor pressure repair requested by an owner/operator?
A: The welder must be qualified for the applicable process by the company making the repair
B: A welder who is an employee of the owner/operator need not be formally qualified
C: The welder must be qualified by an ASME-Code shop, and be current in the process used for
the repair
D: The weld may use any qualified procedures that are in accordance with the ASME Code,
Section IX. - ANSWERS-A: The welder must be qualified for the applicable process by the
company making the repair
Materials used for making repairs shall be of known weldable quality and shall:
A: Be compatible with the original material
B: Be of known toughness
C: Have a minimum tensile strength of 50,000 psi
D: Have an ASTM specification number - ANSWERS-A: Be compatible with the original material
The springs in pressure-relief valves typically fail due to:
A: Tensile overload
B: Creep
C: Erosion
