API 653 RECERTIFICATION QUIZ 2026
QUESTIONS WITH SOLUTIONS GRADED A+
⩥ Tank reconstruction. Answer: Activity requiring a new nameplate after
completion
⩥ Corroded roof plates. Answer: Must not be less than 0.09'' thick
averaged over any 100 in. squared
⩥ New nameplate. Answer: Added after tank reconstruction
⩥ Shell thickness readings. Answer: Must be within the last 180 days for
determining allowable liquid height
⩥ Pitting. Answer: Requires corrective action when remaining thickness
is less than 50% t min
⩥ Critical zone. Answer: Includes the bottom within 3'' of the shell
⩥ Tank age. Answer: 20 years old with a bottom thickness of 0.170'';
original bottom thickness was 0.250''
,⩥ Interval for next Internal Inspection. Answer: 1.5 years for the given
tank age and bottom thickness
⩥ Sacrificial anode. Answer: Type of cathodic protection with generally
low annual maintenance costs
⩥ Hot taps. Answer: Permitted only in the liquid section of a tank
⩥ API 653 hydrotest. Answer: Minimum duration is 24 hours
⩥ Alteration in API 653. Answer: Includes the addition of 16 NPS
nozzle
⩥ Vacuum box or tracer gas test. Answer: Examination methods for
repaired or replaced bottom welds
⩥ Welding procedures for tank repair. Answer: Should be qualified in
accordance with ASME BPVC Section IX
⩥ Lap patch. Answer: Installed on a tank bottom with a minimum
dimension of 12''
⩥ API 653 users. Answer: Owner/operator organizations with access to
engineers & inspectors
, ⩥ Qualifying a weld procedure. Answer: Requires a minimum of 2
tension tests
⩥ Calcining of tank concrete ringwall. Answer: Occurs when the
concrete is exposed to high temperature
⩥ Risk of brittle fracture. Answer: Not increased by a change to a
product with increased viscosity
⩥ Most susceptible floating-roof type. Answer: Pan type is the most
susceptible to sinking
⩥ New materials for repair. Answer: Must conform to the current
applicable standard
⩥ Major types of inspection records. Answer: Do NOT include operation
history
⩥ Reconstructed tank components. Answer: Bottom plates welded to
shell must be identified by material type
⩥ Radiograph indication 'F'. Answer: Indicates the IQI is placed on the
film side
QUESTIONS WITH SOLUTIONS GRADED A+
⩥ Tank reconstruction. Answer: Activity requiring a new nameplate after
completion
⩥ Corroded roof plates. Answer: Must not be less than 0.09'' thick
averaged over any 100 in. squared
⩥ New nameplate. Answer: Added after tank reconstruction
⩥ Shell thickness readings. Answer: Must be within the last 180 days for
determining allowable liquid height
⩥ Pitting. Answer: Requires corrective action when remaining thickness
is less than 50% t min
⩥ Critical zone. Answer: Includes the bottom within 3'' of the shell
⩥ Tank age. Answer: 20 years old with a bottom thickness of 0.170'';
original bottom thickness was 0.250''
,⩥ Interval for next Internal Inspection. Answer: 1.5 years for the given
tank age and bottom thickness
⩥ Sacrificial anode. Answer: Type of cathodic protection with generally
low annual maintenance costs
⩥ Hot taps. Answer: Permitted only in the liquid section of a tank
⩥ API 653 hydrotest. Answer: Minimum duration is 24 hours
⩥ Alteration in API 653. Answer: Includes the addition of 16 NPS
nozzle
⩥ Vacuum box or tracer gas test. Answer: Examination methods for
repaired or replaced bottom welds
⩥ Welding procedures for tank repair. Answer: Should be qualified in
accordance with ASME BPVC Section IX
⩥ Lap patch. Answer: Installed on a tank bottom with a minimum
dimension of 12''
⩥ API 653 users. Answer: Owner/operator organizations with access to
engineers & inspectors
, ⩥ Qualifying a weld procedure. Answer: Requires a minimum of 2
tension tests
⩥ Calcining of tank concrete ringwall. Answer: Occurs when the
concrete is exposed to high temperature
⩥ Risk of brittle fracture. Answer: Not increased by a change to a
product with increased viscosity
⩥ Most susceptible floating-roof type. Answer: Pan type is the most
susceptible to sinking
⩥ New materials for repair. Answer: Must conform to the current
applicable standard
⩥ Major types of inspection records. Answer: Do NOT include operation
history
⩥ Reconstructed tank components. Answer: Bottom plates welded to
shell must be identified by material type
⩥ Radiograph indication 'F'. Answer: Indicates the IQI is placed on the
film side
