29 Questions
API 653 Covers which of the following activities?
tank reconstruction
Corroded roof plates on a fixed roof tank shall not be less than
0.090" in any 100 inch squared area
A new nameplate should be added to a tank after
it has been reconstructed
for a reconstructed tank, the shell thickness readings used to determine the allowable shell height must have been taken within the last:
180 days
the impressed current sources of a cathodic protection system should be checked (to see if still operating) every
two months
which of the following is part of the critical zone
the bottom within 3" of the shell
a tank is 20 years old and has a bottom thickness of 0.170". Original bottom thickness was 0.250". Determine the interval for the next internal inspections
17.5 years
Widely scattered pitting in a tank shell can be ignored if the extent of the pitting does not exceed
2 inch in any vertical 8 inches
Which of the following is an advantage of the galvanic cathodic protection systems
annual maintenance costs are generally low
Hot taps are permitted:
only in the liquid section of the tank
An API 653 hydro test shall be held for at least
24 hours
Which of the following activities is considered an alteration in API 653
the addition of a 16 NPS nozzle
repaired or replaced bottom welds shall be examined with either a vacuum box or by using
a tracer gas test
welding procedures for tank repairs to the shell should be qualified in accordance with
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
12"
API 653 is intended to be used by Owner/Operator organizations that
have access to engineers and inspectors
Which of the following tests are required when qualifying a weld procedure
a minimum of 2 tension tests
calcining of a tanks concrete ringwall can occur when the concrete is
exposed to a high temperature
Which of the following does not increase the risk of brittle fracture
change to a product with increased viscosity
Which external floating roof is most susceptible to sinking
pan
All new materials used for repairs must conform to
current applicable standard
which of the following is not considered one of the major types of inspection records
operation history
Which tank component in a reconstructed tank must be identified by material type
bottom plates welded to the shell
an F on the radiograph indicates
the IQI is placed on the film side
if an atmospheric tank is air tested, the pressure should not exceed
2 inches of water
the welding position 4G is a(n)
overhead plate groove weld
A new tank bottom was installed above the existing tank bottom. Now the spacing between a nozzle and the new bottom is below the minimum requirements of API 650. Which of the following is not an acceptable method of repair
remove the existing reinforcement pad
During a tank repair, if API 653 conflicts with the design standard, which standard governs?
API 653
All reconstruction work must be authorized by the
either the engineer or inspector
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