API 653 Practice Questions With
Verified Correct Answers
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Two methods of quantifying the remaining thickness of tank bottoms
are mentioned in API 653. One method uses the formula involving
"MRT". What is the name of the other method?
a. Deterministic and Analytic
b. Methodological and Non-destructive
c. Quantitative and Destructive
d. Probabilistic and Deterministic - Answer: Probabilistic and
Deterministic
,What is the maximum out-of-plumbness allowed from the top of the
shell to the bottom of the shell on a 48' high tank?
a. 5.76"
b. 5.00"
c. 5.48"
d. 4.80" - Answer: 5.00"
Due to strength requirements, the minimum thickness of an annular
plate ring is usually greater than:
a. 0.187"
b. 0.125"
c. 0.100"
d. 0.250" - Answer: 0.100"
The joint between the new material of an insert plate and the old
material of the existing tank shell plate shall be:
a. Lap welded
b. Plug welded
c. Butt welded
d. Fillet welded - Answer: Butt welded
,A pressure test at least 1.5 times the __________ shall be performed
on a nozzle installed by hot tapping after the valve has been installed
on it and prior to mounting the hot tap machine.
a. Design head
b. Operating head
c. Working head
d. Hydrostatic head - Answer: Hydrostatic head
Cone roof storage tanks may be as large as ______ feet in diameter.
a. 100'
b. 50'
c. 300'
d. 80' - Answer: 300'
The simplest type of floating roof is the:
a. Pan
b. Pontoon
c. Double deck
d. Cone - Answer: Pan
, An oxygen deficient atmosphere exists when a tank atmosphere has
less than what percent oxygen by volume?
a. 18.5%
c. 15.0%
b. 19.0%
d. 19.5% - Answer: 19.5%
Lead-in-Air analyzers must be designed to measure _______ Lead-in-Air
concentrations.
a. Organic
b. Inorganic
c. Radioactive
d. Liquid - Answer: Organic
Entry into a confined space is considered to have occurred as soon as:
a. Half the entrant's body is inside the confined space.
b. The entrants head enters the confined space.
c. A part of the entrant's body breaks the plane of an opening into the
space.
Verified Correct Answers
Professional Academic Assistance Services
Services Offered
• Proctored Exam Assistance
• Online Class Management (Full Course Support)
• Exam Preparation & Study Materials
• Assignments and Coursework Support
• Essay and Research Paper Writing
• Discussion Posts & Responses
• Editing and Proofreading
• Confidential Academic Consultation
Helping Students Achieve Academic Excellence
Two methods of quantifying the remaining thickness of tank bottoms
are mentioned in API 653. One method uses the formula involving
"MRT". What is the name of the other method?
a. Deterministic and Analytic
b. Methodological and Non-destructive
c. Quantitative and Destructive
d. Probabilistic and Deterministic - Answer: Probabilistic and
Deterministic
,What is the maximum out-of-plumbness allowed from the top of the
shell to the bottom of the shell on a 48' high tank?
a. 5.76"
b. 5.00"
c. 5.48"
d. 4.80" - Answer: 5.00"
Due to strength requirements, the minimum thickness of an annular
plate ring is usually greater than:
a. 0.187"
b. 0.125"
c. 0.100"
d. 0.250" - Answer: 0.100"
The joint between the new material of an insert plate and the old
material of the existing tank shell plate shall be:
a. Lap welded
b. Plug welded
c. Butt welded
d. Fillet welded - Answer: Butt welded
,A pressure test at least 1.5 times the __________ shall be performed
on a nozzle installed by hot tapping after the valve has been installed
on it and prior to mounting the hot tap machine.
a. Design head
b. Operating head
c. Working head
d. Hydrostatic head - Answer: Hydrostatic head
Cone roof storage tanks may be as large as ______ feet in diameter.
a. 100'
b. 50'
c. 300'
d. 80' - Answer: 300'
The simplest type of floating roof is the:
a. Pan
b. Pontoon
c. Double deck
d. Cone - Answer: Pan
, An oxygen deficient atmosphere exists when a tank atmosphere has
less than what percent oxygen by volume?
a. 18.5%
c. 15.0%
b. 19.0%
d. 19.5% - Answer: 19.5%
Lead-in-Air analyzers must be designed to measure _______ Lead-in-Air
concentrations.
a. Organic
b. Inorganic
c. Radioactive
d. Liquid - Answer: Organic
Entry into a confined space is considered to have occurred as soon as:
a. Half the entrant's body is inside the confined space.
b. The entrants head enters the confined space.
c. A part of the entrant's body breaks the plane of an opening into the
space.
