API 653 - SECTION 650 EXAM 2024 WITH
100% ACCURATE SOLUTIONS
API 650 covers material, design, fabrication, erection and testing requirements for aboveground welded
steel storage tanks. Internal pressure allowed for these tanks approximates atmospheric pressure.
However, the internal pressures mus not exceed what criteria? - ANSWER ☑☑The weight f the roof
plates (1.1.1)
What is the maximum temperature permissible for a 'standard tank' covered by API 650, unless
additional requirements of appendix M of API 650 are followed? - ANSWER ☑☑200F (1.1.1)
Appendix A provides alternative simplified design requirements for tanks where the stressed
components, such as shell plates and reinforcing plates. They are limited to a maximum nominal
thickness of what (inches)? - ANSWER ☑☑1/2" (1.1.7)
Who is responsible for complying with all of the provisions of API 650 when a new tank is built? -
ANSWER ☑☑The manufacturer (1.3)
Required sections of this Standard become mandatory if the Standard has been adopted by _________ -
ANSWER ☑☑Legal jusrisdiction (3.11)
The lowest tempreature considered in the design shall be assumed to be how many degrees Farenheit
above the lowest one-day mean ambient temperature of the locality where the tank is to be installed? -
ANSWER ☑☑15F (3.4)
Material used to construct a tank shall conform to the specifications of API 650. May other material be
used? - ANSWER ☑☑Yes, provdied that the material is certified to meet all the requirements of an
applicable material spec listed in 650 and it is approved by the buyer. (4.1.2)
Shell plates for API 650 tanks are limited to what maximum thickness? - ANSWER ☑☑1.75" (4.2.1.4)
, A tank is to be fabricated using ASTM A283 Grade C 'killed' material. The maximum thickness of the
lower two course plates is 3/4". The tank is to be constructed in Las Vegas, NV. What Minimum Design
Temperature could be used without impact testing? - ANSWER ☑☑35F (3.4) and (Fig 4.2)
An impact specimen is removed from a 1.25" thick ASTM A516 Grade 55 plate. Three impact tests are
taken from the specimen. What average longitudinal impact value must the test meet? - ANSWER
☑☑15ft-lb (Tab 4.5b)
An AST is to be built in Mobile, AL. No other information is available. What design temperature would
you use for this tank? - ANSWER ☑☑25F (Fig 4.2)
An AST's bottom plates are 1/4" thick. They are single-welded lap-jointed. The lap need not exceed how
much? - ANSWER ☑☑1" (5.1.3.5)
The bottom course of a tank is made from 1" thick ASTM A283 Gr C plate. The second course of the tank
is made from 3/4" thick plate. What is the minimum distance that a vertical seam of the top course must
be offset from a vertical seam of the bottom course? - ANSWER ☑☑5t, thickess of thicker course.
(5*1) = 5"
(5.1.5.1b)
In a butt-welded bottom, three plate joints shall be at least how many inches from each other and from
the tank shell? - ANSWER ☑☑12" (5.1.5.4)
Who specifies the design metal temperature, the design specific gravity, the corrosion allowance (if any)
and the design wind velocity for the AST? - ANSWER ☑☑The purchaser (5.2.2)
A tank is buit from ASTM A537M 1 (C-Mn-Si) normalized, quenched and tempered, killed fine-grain,
reduced carbon and TMCP steel. The welding is done by an automatic process. The purchaser requires
hardness testing of the welds. The tank diameter is 19.1M. How many (if any) hardness test(s) will be
required for one circumferential weld? - ANSWER ☑☑One every 30m.
(19.1*pi) = 60m, 2 hardness tests.
(5.3.3.4)
100% ACCURATE SOLUTIONS
API 650 covers material, design, fabrication, erection and testing requirements for aboveground welded
steel storage tanks. Internal pressure allowed for these tanks approximates atmospheric pressure.
However, the internal pressures mus not exceed what criteria? - ANSWER ☑☑The weight f the roof
plates (1.1.1)
What is the maximum temperature permissible for a 'standard tank' covered by API 650, unless
additional requirements of appendix M of API 650 are followed? - ANSWER ☑☑200F (1.1.1)
Appendix A provides alternative simplified design requirements for tanks where the stressed
components, such as shell plates and reinforcing plates. They are limited to a maximum nominal
thickness of what (inches)? - ANSWER ☑☑1/2" (1.1.7)
Who is responsible for complying with all of the provisions of API 650 when a new tank is built? -
ANSWER ☑☑The manufacturer (1.3)
Required sections of this Standard become mandatory if the Standard has been adopted by _________ -
ANSWER ☑☑Legal jusrisdiction (3.11)
The lowest tempreature considered in the design shall be assumed to be how many degrees Farenheit
above the lowest one-day mean ambient temperature of the locality where the tank is to be installed? -
ANSWER ☑☑15F (3.4)
Material used to construct a tank shall conform to the specifications of API 650. May other material be
used? - ANSWER ☑☑Yes, provdied that the material is certified to meet all the requirements of an
applicable material spec listed in 650 and it is approved by the buyer. (4.1.2)
Shell plates for API 650 tanks are limited to what maximum thickness? - ANSWER ☑☑1.75" (4.2.1.4)
, A tank is to be fabricated using ASTM A283 Grade C 'killed' material. The maximum thickness of the
lower two course plates is 3/4". The tank is to be constructed in Las Vegas, NV. What Minimum Design
Temperature could be used without impact testing? - ANSWER ☑☑35F (3.4) and (Fig 4.2)
An impact specimen is removed from a 1.25" thick ASTM A516 Grade 55 plate. Three impact tests are
taken from the specimen. What average longitudinal impact value must the test meet? - ANSWER
☑☑15ft-lb (Tab 4.5b)
An AST is to be built in Mobile, AL. No other information is available. What design temperature would
you use for this tank? - ANSWER ☑☑25F (Fig 4.2)
An AST's bottom plates are 1/4" thick. They are single-welded lap-jointed. The lap need not exceed how
much? - ANSWER ☑☑1" (5.1.3.5)
The bottom course of a tank is made from 1" thick ASTM A283 Gr C plate. The second course of the tank
is made from 3/4" thick plate. What is the minimum distance that a vertical seam of the top course must
be offset from a vertical seam of the bottom course? - ANSWER ☑☑5t, thickess of thicker course.
(5*1) = 5"
(5.1.5.1b)
In a butt-welded bottom, three plate joints shall be at least how many inches from each other and from
the tank shell? - ANSWER ☑☑12" (5.1.5.4)
Who specifies the design metal temperature, the design specific gravity, the corrosion allowance (if any)
and the design wind velocity for the AST? - ANSWER ☑☑The purchaser (5.2.2)
A tank is buit from ASTM A537M 1 (C-Mn-Si) normalized, quenched and tempered, killed fine-grain,
reduced carbon and TMCP steel. The welding is done by an automatic process. The purchaser requires
hardness testing of the welds. The tank diameter is 19.1M. How many (if any) hardness test(s) will be
required for one circumferential weld? - ANSWER ☑☑One every 30m.
(19.1*pi) = 60m, 2 hardness tests.
(5.3.3.4)
