1. Post weld heat treatment of
vessel welds generally results in:
a.
Improvement in ductility
b.
Increase of tensile strength
c.
Increase of strength and ductility
d.
None of the above
2. The __________ shall be
responsible to the owner-user for determining that the requirements of API 510
for inspection, and testing are met.
a.
Vessel engineer
b.
Authorised inspector
c.
Repair organisation
d.
Operating personnel
3.
Vessels that are known to have a remaining life of
over __________ years or that are protected against external corrosion need not
have insulation removed for the periodic external inspection.
a.
10
b.
15
c.
5
d.
20
4. After an inspection interval is completed and if calculations
indicate that an inaccurate rate of corrosion has been assumed initially, how
do you determine the corrosion rate for the next inspection period?
a.
Check the original calculations to find out what
the error is in the original assumption.
b.
Unless the corrosion rate is changed by
Jurisdiction, the initial rates shall be used.
c.
The corrosion rate shall be adjusted to agree with
the actual rate found.
d.
Call in a corrosion specialist
5. If a vessel is made up of unknown materials and computations
must be made to determine the MAWP what can the inspector or the vessel
engineer do to establish the MAWP?
a.
The lowest grade material and highest joint efficiency
in the applicable code may be assumed for calculations.
b.
Assume MOC as SA 283 Gr.C and joint efficiency =
0.7
c.
The vessel made of the unknown material must be
removed from service and vessel of known material must be installed.
d.
The vessel of unknown material shall be subjected
to hydrostatic tests while having strain gages on it to determine its yield
strength and thus allowable stress.
6. An RBI
assessment can be used to alter the inspection strategy provided:
a.
The degradation methods are identified and
evaluated
b.
The RBI is fully documented.
c.
A third party conducts the RBI
d.
Both A and B above
7. What
climatic area may require a very active program for corrosion under insulation?
a.
Cooler dry locations.
b.
Very cold locations with year round temperature less
than 25°F
c.
Warmer, wet locations
d.
Warmer dry locations
8. Soil-to-air (S/A) interfaces for partially buried vessels are a
location where localized corrosion may take place. If the buried part is
excavated for inspection, how deep should the excavation be to determine if
there is hidden damage?
a.
12 to 18 inches
b.
6 to 12
inches
c.
12 to 24 inches
d.
6 to 18 inches
9. Environmental cracking of
austenite stainless steels is caused many times by:
a.
Exposing areas to high-velocity and high-turbulence
streams
b.
Excessive cyclic stresses that are often very low
c.
Exposure to chlorides from salt water
d.
Creep of the material by long time exposure to high
temperature and stress
10. Where can fatigue cracking
typically be first detected?
a. At points of low-stress intensification such as
reinforced nozzles
b. At points of high-stress intensification such as branch connections
b. At points of high-stress intensification such as branch connections
c. At points where cyclic stresses are very low
d. At points where there are only the primary stresses
API 510 PREPARATORY Final Exam – Closed Book Answer Key
Q.
|
ANS.
|
REFERENCE
|
1
|
A
|
General Knowledge
|
2
|
B
|
API 510, 4.4
|
3
|
A
|
API 510, 6.3
|
4
|
C
|
API 510, 6.4
|
5
|
B
|
API 510, 6.7
|
6
|
D
|
API 510, 6.2
|
7
|
C
|
API 572, 8.2.1
|
8
|
D
|
API 572, 8.2.9
|
9
|
C
|
IRE II, 202.064
|
10
|
B
|
API 510, 5.2
|
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