AND DETAILED ANSWER EXPLANATIONS | A+ STUDY RESOURCE
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
Answer
A: Estimated corrosion rates for new equipment are accurate
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
Answer
A: for 6 months
A Vessel has a single corrosion rate of 10 mils per year. The minimum vessel required thick-
ness 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
1
,Answer
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 inspec-
tion 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
Answer
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
Answer
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 consid-
ered which of the following:
A: A modification
B: A rework
C: An alteration
2
,D: A repair
Answer
C: An alteration
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 cur-
rent 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
Answer
A: Perform calculations to determine if the vessel thickness is sufficient
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 con-
sulted
C: Pressure vessel engineer experienced in pressure vessel design has approved the NDE
procedure
D: Pressure test is not practical
Answer
B: Pressure vessel engineer and an authorized pressure vessel inspector have been con-
sulted
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
3
, C: 60F
D: 70F
Answer
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 in-
spection
D: may substitute acoustic emission examination in lieu of stripping insulation
Answer
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
Answer
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 re-
pair
B: A welder who is an employee of the owner/operator need not be formally qualified
4
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
Answer
A: Estimated corrosion rates for new equipment are accurate
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
Answer
A: for 6 months
A Vessel has a single corrosion rate of 10 mils per year. The minimum vessel required thick-
ness 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
1
,Answer
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 inspec-
tion 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
Answer
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
Answer
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 consid-
ered which of the following:
A: A modification
B: A rework
C: An alteration
2
,D: A repair
Answer
C: An alteration
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 cur-
rent 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
Answer
A: Perform calculations to determine if the vessel thickness is sufficient
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 con-
sulted
C: Pressure vessel engineer experienced in pressure vessel design has approved the NDE
procedure
D: Pressure test is not practical
Answer
B: Pressure vessel engineer and an authorized pressure vessel inspector have been con-
sulted
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
3
, C: 60F
D: 70F
Answer
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 in-
spection
D: may substitute acoustic emission examination in lieu of stripping insulation
Answer
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
Answer
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 re-
pair
B: A welder who is an employee of the owner/operator need not be formally qualified
4
