API-510 Closed Book (Verified on test) **FLASH CARDS**
Questions With Complete Solutions
3 pressure gauges are installed for convenience in the
hydrostatic testing of a pressure vessel. The 1st is at the top if
the vessel, the 2nd is 45ft from the top (reading 169.5 psig) and
the 3rd is 100ft from the top (reading 193.5 psig). If the vessel is
125ft high, what is the pressure at the top? [1 foot of water =
0.433 psi]
A: 140 psig
B: 150 psig
C: 189 psig
D: 204 psig Correct Answers B: 150 psig
(.433) (100) 43.3 193.5-43.3= 150.2
A 30-foot-tall (9144-mm-tall) water-filled pressure vessel has an
MAWP of 210 psi (1.45MPa). What pressure must the bottom
head of the vessel be designed for? [1 foot of water = 0.433 psi
(1000 mm of water 0.00978 MPa)
a) 197 psi (l.36MPa)
b) 210 psi (1.45 MPa)
c) 223 psi (1.54 MPa)
d) 240 psi (1.65 MPa) Correct Answers c) 223 psi (1.54 MPa)
A carbon steel vessel in intermittent service at 400°F (204°C)
has a thickness of 0.760 inch (19.3 mm), a minimum required
thickness of 0.600 inch (15.2mm), and a corrosion rate of 0.020
inch per year (0.5 mm/yr). When should inspection for extern
corrosion be performed?
,a) At the next internal inspection
b) In 5 years
c) In 10 years
d) Not required for carbon steel vessels operating below 500°F
(260°C) Correct Answers a) At the next internal inspection
A change in a "nonessential" variable in a welding a procedure
will require:
a) a new procedure PQR.
b) that the WPS be equalities.
c) that the supporting PQR be updated.
d) that the WPS be updated. Correct Answers d) that the WPS
be updated.
A change in a "nonessential" variable in a welding procedure
will require
a) A new procedure qualification record (PQR)
b) That the welding procedure specification (WPS) be re-
qualified
c) That the supporting PQR be updated
d) That the WPS be updated Correct Answers d) That the WPS
be updated
A corner joint is a joint between 2 member that are located:
A: Parallel to each other
B: At approx a 30 deg angle to each other
C: At approx a 60 deg angle to each other
D: At approx right angles to each other Correct Answers D: At
approx right angles to each other
,A crack in a vessel at the cone-to-cylinder juncture can be
repaired with approval by the API-authorized inspector provided
that:
A: The weld is fully radiographed
B: The weld is postweld heat-treated
C: The weld is postweld heat-treated and fully examined
radiographically
D: An engineer experienced in pressure vessel design is
consulted Correct Answers D: An engineer experienced in
pressure vessel design is consulted
A crack in a vessel at the cone-to-cylinder juncture can be
repaired with approval by the API-authorized inspector,
provided that:
a) the weld is fully radiographed.
b) the weld is postweld heat-treated.
c) the weld is postweld heat-treated and fully examined
radiographically.
d) an engineer experienced in pressure vessel design is
consulted. Correct Answers d) an engineer experienced in
pressure vessel design is consulted.
A crack in a welded joint may be weld-repaired only after:
a) nondestructive testing and inspection.
b) a fitness-for-service evaluation.
c) a hydrogen bake-out of the area.
, d) approval by the authorized pressure vessel inspector. Correct
Answers d) approval by the authorized pressure vessel
inspector.
A defect typically designates:
a) Minimum acceptability
b) An indication that is detectible but acceptable
c) An indication the is rejectable Reference: API-577 paragraph
3.16
d) Indication that requires further investigation Correct Answers
c) An indication the is rejectable Reference: API-577 paragraph
3.16
A liquid-penetrant procedure used during a vessel inspection
must be re-qualified
when all but which of the following are changed?
a) Type of penetrant, remover, and developer
b) Material being examined
c) Minimum light intensity
d) Method of applying developer Correct Answers b) Material
being examined
A low energy value on a test for notch toughness indicates that a
metal is:
a) Ductile
b) Elastic
c) Brittle
d) Low strength Correct Answers c) Brittle
Questions With Complete Solutions
3 pressure gauges are installed for convenience in the
hydrostatic testing of a pressure vessel. The 1st is at the top if
the vessel, the 2nd is 45ft from the top (reading 169.5 psig) and
the 3rd is 100ft from the top (reading 193.5 psig). If the vessel is
125ft high, what is the pressure at the top? [1 foot of water =
0.433 psi]
A: 140 psig
B: 150 psig
C: 189 psig
D: 204 psig Correct Answers B: 150 psig
(.433) (100) 43.3 193.5-43.3= 150.2
A 30-foot-tall (9144-mm-tall) water-filled pressure vessel has an
MAWP of 210 psi (1.45MPa). What pressure must the bottom
head of the vessel be designed for? [1 foot of water = 0.433 psi
(1000 mm of water 0.00978 MPa)
a) 197 psi (l.36MPa)
b) 210 psi (1.45 MPa)
c) 223 psi (1.54 MPa)
d) 240 psi (1.65 MPa) Correct Answers c) 223 psi (1.54 MPa)
A carbon steel vessel in intermittent service at 400°F (204°C)
has a thickness of 0.760 inch (19.3 mm), a minimum required
thickness of 0.600 inch (15.2mm), and a corrosion rate of 0.020
inch per year (0.5 mm/yr). When should inspection for extern
corrosion be performed?
,a) At the next internal inspection
b) In 5 years
c) In 10 years
d) Not required for carbon steel vessels operating below 500°F
(260°C) Correct Answers a) At the next internal inspection
A change in a "nonessential" variable in a welding a procedure
will require:
a) a new procedure PQR.
b) that the WPS be equalities.
c) that the supporting PQR be updated.
d) that the WPS be updated. Correct Answers d) that the WPS
be updated.
A change in a "nonessential" variable in a welding procedure
will require
a) A new procedure qualification record (PQR)
b) That the welding procedure specification (WPS) be re-
qualified
c) That the supporting PQR be updated
d) That the WPS be updated Correct Answers d) That the WPS
be updated
A corner joint is a joint between 2 member that are located:
A: Parallel to each other
B: At approx a 30 deg angle to each other
C: At approx a 60 deg angle to each other
D: At approx right angles to each other Correct Answers D: At
approx right angles to each other
,A crack in a vessel at the cone-to-cylinder juncture can be
repaired with approval by the API-authorized inspector provided
that:
A: The weld is fully radiographed
B: The weld is postweld heat-treated
C: The weld is postweld heat-treated and fully examined
radiographically
D: An engineer experienced in pressure vessel design is
consulted Correct Answers D: An engineer experienced in
pressure vessel design is consulted
A crack in a vessel at the cone-to-cylinder juncture can be
repaired with approval by the API-authorized inspector,
provided that:
a) the weld is fully radiographed.
b) the weld is postweld heat-treated.
c) the weld is postweld heat-treated and fully examined
radiographically.
d) an engineer experienced in pressure vessel design is
consulted. Correct Answers d) an engineer experienced in
pressure vessel design is consulted.
A crack in a welded joint may be weld-repaired only after:
a) nondestructive testing and inspection.
b) a fitness-for-service evaluation.
c) a hydrogen bake-out of the area.
, d) approval by the authorized pressure vessel inspector. Correct
Answers d) approval by the authorized pressure vessel
inspector.
A defect typically designates:
a) Minimum acceptability
b) An indication that is detectible but acceptable
c) An indication the is rejectable Reference: API-577 paragraph
3.16
d) Indication that requires further investigation Correct Answers
c) An indication the is rejectable Reference: API-577 paragraph
3.16
A liquid-penetrant procedure used during a vessel inspection
must be re-qualified
when all but which of the following are changed?
a) Type of penetrant, remover, and developer
b) Material being examined
c) Minimum light intensity
d) Method of applying developer Correct Answers b) Material
being examined
A low energy value on a test for notch toughness indicates that a
metal is:
a) Ductile
b) Elastic
c) Brittle
d) Low strength Correct Answers c) Brittle
