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Study Guide API 653 Latest 2024
Graded A+
API 653 covers which of the following activities?
a) Tank Design
b) Tank Fabrication
c) Tank Operation
d) Tank Reconstrusction ✔✔d) Tank Reconstruction
Corroded roof plates on a fixed-roof tank shall NOT be less than:
a) Designers Recommendation
b) 0.090" thick averaged over any 100 sqin.
c) 0.500" at any point.
d) tmin averaged over critical length "L" Dimension ✔✔b) 0.90" thick averaged over any
100sqin.
A new nameplate shall be added to a tank after:
a) either major alterations or tank reconstructions.
b) either major alterations or tank reconstruction.
c) it has been relocated.
d) it has been reconstructed. ✔✔d) it has been reconstructed.
For a reconstructed tank, the shell thickness readings used to determine the allowable liquid height must have been taken within the last:
a) 30 days.
b) 60 days.
c) 90 days.
d) 180 days. ✔✔d) 180 days.
The impressed current sources of a cathodic protection system should be checked (to see if still operating) every:
a) month
b) two months.
Widely catered pits in a tank shell can be ignored if the extent of the pitting does not exceed:
a)2 pits in any 8 inches.
b) 1 inch in any 8 inches.
c) 2 inches in any 8 inches.
d) 1 inch in any vertical 8 inches.
e) 2 inch in any vertical 8 inches ✔✔e) 2 inch in any vertical 8 inches.
Which of the following is an advantage of the galvanic cathodic protection system?
a) Annual maintenance costs are generally low.
b) A single anode covers large surface areas
c) the Effective life of the anodes is usually 50 years.
d) It is easy to test the system's effectiveness. ✔✔a) annual maintenance costs are generally low
Hot taps are permitted:
a) anywhere on the tank.
b) anywhere on the tank provided the tank is gas free.
c) only in the liquid section of tank.
d) only in the liquid section of tank provided the product flash point is above 250*F. ✔✔c) only
in the liquid section of tank.
An API 653 hydrotest shall be held for at least:
a) 4 hours.
b) 8 hours
c) 12 hours
d) 24 hours ✔✔d) 24 hours
During a tank repair, if API 653 conflicts with the design standard, which standard governs?
a) most stringent standard
b) design standard
c) API 653
d) either standard based on the inspector"s judgment ✔✔c) API 653
a) API 650
b) original construction standard
c) ASME section IX
d) AWS D1.1 ✔✔C) ASME section IX
A lap patch is installed on a tank bottom and the patch plate crosses a tank bottom weld. What is the minimum dimension for this patch plate?
a) any size
b) 6"
c) 10"
d) 12" ✔✔d) 12"
API 653 is intended to be used by owner/operator organizations that:
a) employ tank inspectors
b) have access to engineers and inspectors
c) have a quality control manual
d) have both inspection and repair organizations ✔✔b) have access to engineers and inspectors
Which of the following tests are required when qualifying a weld procedure?
a) UT the complete assembly
b) a minimum of 6 bend tests
c) radiograph the completed assembly
d) a minimum of 2 tension tests ✔✔d) a minimum of 2 tension tests
Calcining of the tank concrete ringwall can occur when the concrete is:
a) exposed to a high temperature
b) attacked by an aggressive chemical
c) cracked and the reinforcement is exposed to atmosphere
d) exposed to freezing temperatures ✔✔a) exposed to a high temperature
Which of the following does NOT increase the risk of brittle fracture?
Which of the following is NOT considered one of the major types of inspection records?
a) operation history
b) inspection history
c) construction data
d) repair history ✔✔a) operation history
Which tank components in a reconstructed tank must be identified by material type?
a) roof plates
b) manway covers
c) bottom plates welded to shell
d) windgirders ✔✔c) bottom plates welded to shell
A "F" on the radiograph indicates:
a) the placement of a location marker
b) the backscatter is present
c) a RT with fast film speed
d) the IQI is placed on the film side ✔✔d) the IQI is placed on the film side
A new tank bottom was installed above the existing bottom. Now the spacing between a nozzle and new bottom is below the minimum requirements of API 650. Which of the following is NOT an acceptable method of repair?
a) trim the existing reinforcement pad and reweld
b) remove the existing reinforcement pad
c) replace the existing reinforcement pad with a thicker pad that has a smaller diameter
d) cut out a section of the shell with the nozzle and reinforcing pad the raise entire assembly
✔✔b) remove the exsisting reinforcement pad
The welding position "4G" is a:
a) overhead pipe groove weld
b) overhead plate groove weld
c) either a plate or pipe overhead groove weld
The qualifications for the person performing the external inspection include:
a) being knowledgeable of the specific tank operation
b) being able to read a Jaeger 3 eye chart
c) being certified as a API 653 Inspector
d) having a high school education ✔✔c) being certified as a API 653 Inspector
Which type of settlement causes the greatest stress on the shell to bottom weld?
a) out of plane
b) planar tilt
c) uniform
d) ridged body tilt ✔✔a) out of plane
Shell lap patches are only allowed on:
a) tanks made from Group IV, V,& VI materials
b) the upper three courses
c) plates that do not exceed 1/2"
d) plates where the membrane stress does not exceed 700 ksi ✔✔c) plates that do not exceed
1/2"
A welders qualification expires if:
a) he has not welded using the procedure within 6 months
b) he has not welded using the process within 6 months
c) he has not welded within 3 months
d) any of his welds fail to meet the primary code acceptance standards ✔✔b) he has not welded
using the process with in 6 months
During a tank reconstruction, a 0.750" shell course can be dismantled by cutting:
a) through the welds
b) a minimum of 1" away from the existing weld
c) a minimum of 2" away from the existing weld
Pitted roof plates in a floating roof shall NOT be less than:
a) 0.050" thick
b) 0.090" thick
c) what will cause a penetration by the next inspection
d) designers recommendation ✔✔c) what will cause a penetration by next inspection
Fatigue will NOT occur in carbon steel if stresses are below the :
a) transition limit
b) endurance limit
c) hardening limit
d) speed limit ✔✔b) endurance limit
In a corroded area "T2" the least thickness exclusive of pits, shall be greater than or equal to:
a) 60% of t-min plus corrosion allowance to next inspection
b) 60% of t-min
c) 0.100" plus corrosion allowance to inspection
d) 0.100" ✔✔a) 60% of t-min plus corrosion allowance to next inspection
The qualifications for the person performing the routine in-seervice inspections includes:
a) being knowledgeable of the tank operation
b) being able to read a jaeger 2 eye chart
c) being certified as an API 653 inspector
d) being able to leap a truck over the tank dike ✔✔a) being knowledgeable of the tank operation
Prior to the work, all alterations must be authorized by the:
a) Inspector
b) engineer
c) both the inspector and engineer
d either the inspector or engineer ✔✔b) engineer
The grain structure of weld metal is most similar to that found in:
c) lesser of 5 years or 1/4 life of shell
d) lesser of 10 years or 1/2 life of shell ✔✔c) lesser of 5 years of 1/4 life of shell
Existing weld joints in a reconstructed tank shall meet the minimum requirements of:
a) latest edition of API 650
b) as built standard
c) current construction standard
d) applicable standard ✔✔b) as built standard
Corrosion has been found on a tank bottom. The calculated remaining life on a tank bottom is 30 years. What is the Maximum interval for the next internal inspection (no RBI & no RPB)?
a) 10 years
b) 15 years
c) 20 years
d) inspector judgement ✔✔c) 20 years
The minimum thickness for replacement roof plates on a cone roof tank is:
a) 3/16" plus corrosion allowance
b) 1/4" plus corrosion allowance
c) 5/16" plus corrosion allowance
d) based on an engineering calculation ✔✔3/16" plus corrosion allowance
Certification of work performed is required after which activity?
a) major repairs and major alterations
b) major alterations
c) tank relocation
d) tank reconstruction ✔✔d) tank reconstruction
The minimum degree of surface cleanliness for a tank bottom prior to installing a coating is:
a) NACE #
b) NACE #
