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SET - A
API-510 Preparatory Course
1. Following combination of Base metal and welding electrode was
qualified by a certain PQR. Impact testing is not required.
Base Metal = SA 285 Grc Plates, 3/4" thk
Welding electrode = AWS E 6015, 1/8" dia.
This PQR will qualify which of the following combinations of Base
Metal – Welding electrodes.
a) 1" thk SA 515gr 60 plates, E 6013 electrodes, 5/32 " dia.
b) 1 ¾ " thk SA 285 grc plates, E 6013 electrodes, 5/32" dia.
c) 1 ¼ thk plates plates SA516gr70, E 7018 electrodes, 3/32
dia
d) None of above
2. A pressure vessel is to be constructed to with MDMT = + 20 0F ,
M.O.C = SA 285 gr C .Required shell thickness = ¾ , Required
dished head thickness = 1 1/8 " thk (torisph) Determine if this
material is suitable for:
a) Both shell as well as Dished head
b) Suitable for head but not for shell
c) Suitable for shell only but not for head
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d) Not suitable for either
3. Name plate of a certain pressure vessel has name plate
stamping as “ RT 3 “ for the radiography, All Welds are type 1
welds.
Vessel dia. = 72 inch I.D.
M.O. C = SA 515 gr 70 Design temp = 600F
Allowable stress at design temp = 20,000 psi
If shell Thickness = 5/8" and C. A = 1/8" The MAWP for the
vessel shell will be
a. 234 psi
b. 168 psi
c. 256 psi
d. 286psi
4. Following two combinations of nozzle pipe dia and shell thickness
are given of reinforcement. Case 1: vessel wall thk = ½ " and
nozzle size NPS 3, Case 2 vessel wall thk = ¾ " Nozzle size NPS
2.
According to ASME Sec. VIII Div. 1, the reinforcement
requirement for which of above nozzles by should be verified by
calculations
a. For both cases
b. For none
c. Calculations required for 1 but not for 2
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d. Calculations required for 2 and not for 1
5. Which of the following changes on a pressure vessel could be
termed as an alteration?
a. Addition of a reinforced nozzle of size equal to an existing
nozzle
b. Addition of a nozzle not requiring reinforcement
c. Addition of a reinforced nozzle of size greater than an
existing nozzle, where the thickness of reinforcement was
found to be inadequate for the internal pressure
d. Only “b” and “c”
6. In liquid Penetrant Testing, a procedure is qualified to a
temperature of 15 0C. pick up a correct statement.
a. The same procedure is qualified to the temperature from
10 0C to 52 0C
b. The same procedure is restricted to maximum of 15 0C
only
c. The same procedure shall be applied to 5 0C to 10 0C
d. The same procedure is qualified to the temperature from 0
C to 5 0C
0
7. In a magnetic particle testing, the operator reported a rounded
indication with the following dimensions. Major dimension is 6.0
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mm and Minor dimension is 3.0 mm. But upon using a powerful
magnifier, it was revealed that actual defect is only 4 x 1.5 mm.
Based on Acceptance criteria of Asme Sec. VIII, Div 1, the
indication shall be:
a. accepted, as the magnifier shows indication within
acceptance standards
b. accepted, as it is not a major defect
c. rejected, as the visual inspection using magnifier shows
critical indication
d. rejected, as the dimensions shown by the indication is
above acceptance standards
8. A lead letter of B is used in radiography in order to know the
scatter in well within the limits
a. By keeping the letter B on source side and image of B on
film shall be lighter than the background
b. By keeping the letter B on source side and image of B on
film shall be similar or darker than the background
c. By keeping the letter B on film side and image of B on
film shall be similar or darker than the background
d. By keeping the letter B on film side and image of B on
film shall be lighter than the background
9. For instrument calibration in Ultrasonic Testing, amplitude control
linearity forms an important factor. The allowable tolerance for
amplitude height linearity (of the nominal amplitude ratio) is:
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a. + 5 %
b. + 10 %
c. + 15 %
d. + 20 %
10.
Which
of
the
following
penetrant
system
is
generally
considered least sensitive?
a. Water-washable – visible dye.
b. Solvent removable – visible dye.
c. Water-washable – fluorescent dye.
d. Post-emulsification – visible dye.
11.
MPI can not be adopted for which of the following materials?
a. Iron
b. Steel
c. Austenitic Stain less steels
d. All of the above
12.
Which of the following is an advantage of magnetic particle
testing over penetrant testing?
a. It can detect surface discontinuities with foreign material
imbedded in them.
b. It is faster on individual parts.
c. It can detect near-surface discontinuities.
d. All of the above.
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13.
Which of the following types of discontinuities is not normally
detected by radiography?
a. Cracks
b. Incomplete penetration
c. Laminations
d. Slag
14.
Double
wall
Double
image
technique
is
used
for
the
radiography of:
a. Plate welds
b. Tubular products with outer diameter up to 3.5 in
c. Large pipes with outer diameter 200 mm and above
d. Heavy castings
15. Visual check shall be carried out.
a. Before welding
b. During welding
c. After welding.
d. At all the above stages
16.
Which of the following ASME Boiler and Pressure Vessel Code
sections are referenced in API 510?
a. ASME Section V
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b. ASME Section VIII Div 1
c. ASME Section IX
d. All of above
17.
Corrosion
and
minimum
thickness
evaluation
may
be
conducted by?
a. Use of a external micrometer
b. Ultrasonic test
c. All of the above
d. None of above
18.
Which of the following are excluded from the scope of
application of API 510?
a.
Pressure vessels on movable structures covered by other
jurisdictional regulations
b.
All
classes
of
containers
listed
for
exemption
from
construction in ASME Section VIII Div. 1
c.
Pressure vessels which do not exceed volume of the five
cubic feet and pressure of 250 psi
d.
19.
All of the above
Widely scattered pits may be ignored as long as the following
conditions are satisfied:
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a. No pit depth is greater than one half the vessel wall
thickness exclusive of the corrosion allowance.
b. The total area of the pits does not exceed 7 square inches
or 45 square cm within any 8 inch diameter circle
c. The sum of their dimensions along any straight line within
a circle of diameter 8 inches does not exceed 2 inches ( 5
cm)
d. All of the above
20.
Each vessel above ground shall be given a visual external
inspection preferably while in operation at a frequency of:
a. At least once in every 5 years
b. Same as that required for internal or on – stream
inspection
c. The lesser of “a” or “b”
d. None of the above are applicable
21.
An ellipsoidal head has an internal diameter of 76 inches and
a depth of 21 inches (including a straight face of 2 inches).
What should its spherical radius be for the crown portion?
a. 76.0 inches
b. 38.0 inches
c. 68.4 inches
d. 60.8 inch
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SET - B
API-510 Preparatory Course
1.
Re-rating
may
be
done
after
which
of
the
following
requirements are met?
a.
Calculations from either the manufacturer or an
owner-use pressure vessel engineer experienced in
pressure vessel design, fabrication or inspection shall
justify the re-rating.
b.
The re-rating is in accordance with the construction
code to which the pressure vessel was originally built
or by computations that are determined using the
appropriate formulae in the latest edition of the
ASME Code
c.
Current inspection records verify that the pressure
vessel
is
satisfactory
for
the
proposed
service
conditions and that the corrosion allowance provided
is adequate.
d.
2.
All of the above
Which of the following is / are to be undertaken in case the
ownership and location of vessel are changed?
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a.
The vessel shall be hydro tested only
b.
The
vessel
shall
be
internally
and
externally
inspected before it is re-used
c.
The
allowable
conditions
of
service
shall
be
established and the next period of inspection shall be
established for the new service.
d.
3.
Only “b” and “c”
A new pressure vessel should be inspected to which of the
following codes?
4.
a.
API 510
b.
API 572
c.
ASME Sec. VIII Div. 1
d.
All of the above
For repairs as per API 510, the welders and welding
procedures shall be qualified to the requirement of:
5.
a.
API 1104 code
b.
ASME Section V
c.
ASME Section IX
d.
AWS D 1.1
Calculate the remaining life of a vessel given the following
data: Actual
thickness
= 0.955 inch.
Minimum thickness
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required = 0.787 inch Thickness at pervious inspection 5
years prior to present inspection = 1.015 inch
6.
a.
20 years
b.
14 years
c.
28 years
d.
None of the above
The period between the two consecutive internal (or onstream) inspections shall not exceed?
a.
One half of the remaining life of the vessel (based on
corrosion rate)
b.
10 years
c.
cases where the safe working life is estimated to be
less than 4 years the inspection interval may be the
full remaining safe operating life up to a maximum of
2 years
d.
7.
The least of above
After completion or repairs, a pressure test
a.
Must always be conducted
b.
Shall be applied if the authorized pressure vessel
inspector believes that one is necessary
c.
Must never be conducted
d.
Shall be conducted only if repair is done on pressure
parts.
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8.
If probable corrosion rates can not be determined, on stream
determinations shall be made after approximately
9.
a.
10,000 hours of service
b.
1000 hours of service
c.
5000 hours of service
d.
After 2,500 hours of service
Which of the following documents referenced in API 510
addresses recommended inspection practices for pressure
vessels?
10.
a.
API 620
b.
API 572
c.
API Std 526
d.
All of the above
After completion of alterations a pressure test
a.
Normally required
b.
Subject to approval of the jurisdiction ( where
applicable ) appropriate NDE shall be required where
pressure test is not performed
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c.
Substituting NDE procedure for a pressure test after
an alteration ay be done only after consulting a
pressure vessel engineer experienced in pressure
vessel design and the authorized pressure vessel
inspector have been consulted
d.
11.
All of above
Materials used for making repair by welding in carbon steel
vessels shall have the following limitations?
a.
They shall meet the requirements stipulated I NACE
MR 0175
b.
The carbon content shall not be over 0.35%
c.
Welding repair shall be done by using only the GTAW
process
d.
12.
All of the above
Corrosion under insulation (CUI) due to environmental factors
like
humidity,
moisture,
will
be
more
pronounced
at
temperature
a.
Below 250F
b.
250F to 2500F
c.
More than 2500
d.
Other
factors
being
same
corrosion
in
above
temperature ranges will be same minimize.
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13. During Hydrostatic testing, risk of brittle fracture, which of the
following action may be taken
a. Replace Hydro testing by pneumatic testing
b. Recalculate test pressure based on material stress at
MDMT
c. Carry out test at temperature more 300F above MDMT
d. None of the above
14. Authorization for which of the following approval from pressure
vessel engineer is not mandatory
a. Repairs for vessels that comply with sec VIII Div 1
b. Alterations for vessels that comply with sec VIII Div 1
c. Repairs for vessels that comply with sec VIII Div 2
d. Alternations for vessels that comply with sec VIII Div 2
15. In WPS PQR documentation, the essential, supplementary
essential and Non-essential variables (EV, SEV, NEV) shall be
addressed in these documents. Which document shall address
which of the variables.
a. All EVs , SEVs and NEV s shall be addressed in both WPS
and PQR
b. Only EV s and SEVs shall be addressed in both PQR and
WPS documents
c. PQR shall address all EVs and SEVs while WPS shall
record all EV s , SEV s and NEVs
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d. WPS shall address EV s and SEVs while PQR must record
all EVs , SEVs and NEVs
16. Corrosion and minimum thickness evaluation may be conducted
by?
a. Use of Magnetic particle examination
b. Ultrasonic testing
c. Profile radiography
d. Only “b” and “c”
17. Which of the following is / are to be undertaken in case the
ownership or location of vessel are changed
a. The vessel shall be internally inspected before it is re-used
b. The vessel shall externally inspected before it is re-used.
c. The allowable conditions of service shall be established and
the next period of inspection shall be established for the new
service.
d. All of the above
18. Which of the following are essential elements of a Quality control
system of a repair organization?
a. Statement of authority and responsibility
b. Welding procedures
c. The relationship of the QC manager with the owner
d. All of the above
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e. Only “a” and “b” above
19. Welders and welding procedures shall be qualified to the
requirement of
a. ASME Section VIII Div. 1
b. ASME Section V
c. ASME Section IX
d. None of the above
20. Calculate the remaining life of a vessel given the following data:
Actual thickness = 0.955 inch Minimum thickness required =
0.755 inch Thickness at pervious inspection 5 years prior to
present inspection = 1.025 inch
a. 20 years
b. 14 years
c. 28 years
d. Any of the above depending upon ambient conditions
21. The period between internal or on-stream inspections shall not
exceed?
a. One half of the remaining life of the vessel (based on
corrosion rate)
b. 10 years
c. The lesser of “a” and “b”
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d. In cases where the safe working life is estimated to be
less than 4 years the inspection interval may be the full
remaining safe operating life up to a maximum of 2
years
e. “c” and “d” above
22. After completion or repairs a pressure test
a. Must always be conducted
b. Shall be applied if the authorized pressure vessel
inspector believes that one is necessary
c. Must never be conducted
d. Only “a’ and “b” above
23.
Which of the following changes on a pressure vessel could be
termed as an alteration?
a. Addition of a reinforced nozzle of size equal to an
existing nozzle
b. Addition of a nozzle not requiring reinforcement
c. Any change that effect the pressure containing
capacity of the vessel beyond the scope of items
described in existing data reports
d. All of the above
e. Only “b” and “c”
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24.
If the bolt shank corrosion is anticipated for foundation bolts,
what testing methods are recommended?
a. Tensile testing of equivalent sized rivets
b. Hammer testing
c. RT at an angle to the shank axis
d. All of the above
25.
Which of the following documents referenced in API 510
addresses recommended inspection practices for pressure
vessels?
a. API 620
b. API Recommended practice 572
c. API Std 526
d. All of the above
26.
After completion of alterations a pressure test is:
a. Normally required
b. Subject to approval of the jurisdiction (where
applicable ) appropriate NDE shall be required where
pressure test is not performed
c. Substituting NDE procedure for a pressure test after
an alteration ay be done only after consulting a
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pressure vessel engineer experienced in pressure
vessel design and the authorized pressure vessel
inspector have been consulted
d. All of the above
27.
Which of the following are typical conditions found on the
external surfaces of vessels?
a. Blistering
b. Caustic embrittlement
c. CUI
d. Only “b” and “c” above
28.
The external surfaces of vessels should be examined not only
for corrosion but also for:
a. Leaks
b. Cracks
c. Buckles
d. All of the above
29. Erosion would normally be exhibited at:
a. Wear plates on saddles
a. Baffle plates
b. Impingement plates
c. All of the above except “a”
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30.How is hammer testing utilized?
a. As a supplement to visual inspection
b. To be confirmed by subsequent NDT
c. None of above
d. Only “b” and “a” above
31.
Shells of vessels adjacent to inlet impingement plates are
susceptible to
a. Stress-corrosion cracking
b. Erosion
c. Hydrogen embrittlement
d. Any of the above depending upon ambient conditions
32.
Which of the following are common reasons for in- service of
shutdown inspection:
a. To determine the physical condition of he equipment
b. To determine the type, rate and causes of deterioration
c. none of the above
d. “a” and “b” above
33.Which of the following may be classified as “internals” of
vessels?
a. Catalyst bed supports
b. Cyclone entry nozzles
c. Demister pads
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d. “a” and “c”
34.If any setting is noticed on a vessel, which of the following
should be done?
a. Conduct RT after 48 hours of observing the defective
condition
b. Nozzles and adjacent shell areas should be inspected for
distortion and cracking
c. Use acoustic emission monitoring
d. All of the above
35.Which of the following are types of NDT methods?
a. Ultrasonic testing
b. Radiographic testing
c. Hammer testing
d. Both “a” and “b”
36.
Which of the following are common reasons for in- service of
shutdown inspection?
a. To determine the physical condition of he equipment
b. To determine the type, rate and causes of deterioration
c. none of the above
d. “a” and “b” above
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SET-C
API 510 Preparatory Course
1.
Which of the following are excluded from the scope of application
of API 510?
a. Pressure vessels on movable structures covered by other
jurisdictional regulations
b. All classes of containers listed for exemption from
construction in ASME Section VIII Div. 1
c. Pressure vessels which do not exceed volume of the five
cubic feet and pressure of 250 psi
d. All of the above
2.
During Hydrostatic testing, to avoid risk of brittle fracture, which
of the following action may be taken?
a. Recalculate test pressure based on material stress at test
temperature
e. Carry out test at temperature more 300F above MDMT
f. The test area is cordoned off and out of bounds for nonessential personnel
g. None of the above
3.
Which of the following are essential elements of a Quality control
system of a repair organization?
a. Organisational authority and responsibility
b. Statements about Working (Inspection/repair)Procedures
and their documentation
c. Statement of controls to ensure Quality conformance
d. All of the above
4.
According to API 510, authorized inspection agency is:
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a. Jurisdiction organization
b. Inspection organisation of Insurance company which under
writes insurance of pressure vessels
c. Inspection organization of owner-user
d. Any of above
5.
Repair Organization: According to API 510 is:
a. Holder of ASME certificate & appropriate code symbol
stamp.
b. Owner-user
c. Contractor under contract with owner-user
d. Any of above
6.
For all repairs and alterations under API 510, the ultimate
responsibility rests with:
a.
b.
c.
d.
Owner user
API Committee
API-510 Inspector
Jurisdiction authority
7.
Identify incorrect statement from following:
a. A welder performing procedure test is also qualified in that
position.
b. Supplementary essential variables become essential
variables when impact test is specified.
c. For procedure qualification, the test can be performed in
any position as the position is not essential variable for
procedure qualification.
d. None of above.
8.
Following two combinations of nozzle pipe dia and shell thickness
are given of reinforcement. Case 1: vessel wall thk = ½ " and
nozzle size NPS 3, Case 2 vessel wall thk = ¾ " Nozzle size NPS
2 ½ According to ASME Sec. VIII reinforcement requirement for
which of above nozzles by should be verified by calculations?
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a.
b.
c.
d.
9.
For both cases
For none
Calculations required for 1 but not for 2
Calculations required for 2 and not for 1
Normally, minimum thickness evaluation may be conducted by?
a.
b.
c.
d.
Use of a external micrometer
Ultrasonic testing
Vernier callipers
None of above
10. Which of the following statements is true?
a.
b.
c.
d.
11.
A Pressure Vessel is being designed for 0.85 joint efficiency with
full penetration welds. RT requirement for such vessel is
a.
b.
c.
d.
12.
All defects are not discontinuities
All discontinuities are defects
Discontinuities are rejectable defects
Defects are rejectable discontinuities
Nil
Spot
100 %
Joints radiography
Post weld heat treatment is carried out
a.
To increase hardness
b.
To increase tensile strength
c.
To release locked-up stresses in the weld
d.
None of above.
13. If all other conditions remain same the design thickness of which
dished end (torispherical, hemispherical, ellipsoidal) will be
maximum?
a.
b.
c.
d.
Torispherical
Hemispherical
Ellipsoidal
All have same thickness
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14. In A 516 Gr 70 specification the letter A indicates:
a.
b.
c.
d.
That material is ASME material. (A for ASME)
That material is Ferrous material
That material is Non-Ferrous material
None of the above
15. Any thickness-offset within the allowable tolerance shall be
provided a taper transition of:
a.
b.
c.
d.
16.
3 to 1 min.
4 to 1 min.
3 to 2 min.
All of the above
For calculating reinforcement pad requirements for given Design
Pressure, which of the following statement is applicable:
a. Credit can be taken for extra metal in shell
b. Credit can be taken for extra metal in nozzle
c. a and b above are true
d. None of above
17. Choose correct Pneumatic test pressure from given options for a
vessel with following data:
Design Pr
=
160 psi
Design temp=
675º F
M.O.C
=
SA 537 Cl. 1
Allow stress (Ambient)
=
20000 psi
Allow stress (675ºF)
=
19200 psi
a.
b.
176.0 psig
215.6 psig
c.
183.3 psig
d.
none of above
18. You are planning for the Hydro-test of a complete vessel with
Hydro test pressure 40Kg/cm2g. The calibrated test gauges
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available with you are 0-50 Kg/cm2g, 0-100 Kg/cm2g, 1-150
Kg/cm2g and 0-200 Kg/cm2g. Which two gauges are acceptable for
this test?
a.
b.
c.
d.
0-50 Kg/cm2g and 0-100 Kg/cm2g
0-100 Kg/cm2g and 0-200 Kg/cm2g
0-50 Kg/cm2g and 0-200 Kg/cm2g
0-100 Kg/cm2g and 0-150 Kg/cm2g
19. You are checking a plate received for the pressure vessel
fabrication. What will be your action plan?
a.
b.
c.
d.
Correlate test certificate with applicable specification
Correlate heat marks and identification with the actual
plate identification
Visual and dimensional inspection
All of the above are necessary action before accepting the
plate.
20. Qualification of welding procedure as per Section IX is required:
a.
b.
c.
d.
21.
For manual welding process
For machine welding process
For semi automatic welding process
For all of the above process
Erosion would normally be seen at:
a.
b.
c.
d.
22.
Drain nozzles
Saddle wear plates
Impingement plates
a. and c.
Temper embrittlement is:
a. Brittleness due to low temperature operation
b. Brittleness due to Hydrogen Sulphide attack at high
temperatures ( exceeding 700 deg. F)
c. Loss of ductility due to incorrect PWHT and High
temperature service
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d. None of above.
23.
Part MAWP for lower dished head in Vertical vessel will
generally be:
a. Lower than top head
b. Lower than shell
c. Higher than both shell and top head
d. Same as both top head and shell
24.
Choose correct statement — Allowable External pressure
for a vessel:
a. Will depend on weld joint efficiency (E)
b. Depends on Vessel temperature
c. Depends on Internal Corrosion allowance
d. Both b and c
25.
PWHT is required for vessels containing products, classified
as “lethal” or a thickness exceeding:
a. 1.0 inch
b. 0 .5 inch
c. 0.0 inch
d. 1.5 inch
SET-D
API 510 Preparatory Course
1.
For safe entry in pressure vessels which of the following
document is adopted in the API-510 body of knowledge?
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a.
b.
c.
d.
2.
A piping & valve system is described as follows: “closure of a
line, duct, or pipe by closing and locking two in-line valves and
by opening and locking a drain or vent valve in the line between
the closed valves” This is designated in API documents as:
a.
b.
c.
d.
3.
5.
Double valve single drain “arrangement
“On-off” arrangement
“Double block and bleed” arrangement
“Double in single out” arrangement
An individual stationed outside one or more permit spaces who
monitors the authorized entrants and orders the authorized
entrants to evacuate the permit space under unsafe conditions.
This individual is referred as:
a.
b.
c.
d.
4.
API – 2015
API – 576
IRE – Chap II
ASME – Sec. V
Supervisor
A qualified person
An attendant
None of above
HCl is more harmful in refining sour crudes because:
a.
In presence of H2S, corrosion of iron by HCl
becomes cyclic reaction regenerating HCl
b.
HCL forms galvanic cell which causes corrosion
cracking
c.
d.
HCl causes loss of ductility of steel.
None of the above
“In austenitic stainless steels, in presence of chlorides
spontaneous failure may occur under combined action of
corrosion and tensile stress” What type of phenomenon is
described by this statement:
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6.
a.
b.
c.
d.
Sour crude
a.
b.
c.
d.
7.
Sensitization of stainless steel
Stress corrosion cracking
Intergranular corrosion of stainless steels
Chromium-decay of stainless steels.
is more corrosive than sweet crude because
Sour crude is heavier than is sweet crude
Sweet crude has more waxing tendency (compared
to sour crude) which forms protective layer on
metallic surfaces hence sweet crudes are less
corrosive.
Sour crude contains high content H2S and sulpher
compared to sweet crude which lead to several types
of corrosion
None of the above.
The nondestructive examination method to be used for a
particular inspection should be determined by the:
a. Availability of certified NDE examiners
b. Length of time since the last inspection
c. Age of the component to be inspected
d. Type, location, and orientation of the expected flaws
8.
In planning for an internal inspection of a vessel that has acidic
corrodents, what type of corrosion would you expect to find on
the vessel shell from inside,
a. Hydrogen blistering in the vapor space
b. Uniform corrosion of vessel wall
c. Erosion of vessel walls.
d. None of above.
9.
The principal reason for inspecting a pressure relief device is to
determine:
a. Condition of pressure relief device and if it is functioning
properly
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b. The remaining life of pressure relief device.
c. The spring coil diameter.
d. The body thickness.
10.
Where (typically) are balanced safety relief valves used in
refineries?
a. For pressure control and bypass
b. On steam boiler drums and super heaters
c. When the discharge from the valves must be piped to
remote points
d. All of the above
11.
Which of the following are possible reasons for improper
performance of valves?
a.
b.
c.
d.
12.
Which of the following tests must be conducted on a valve as
soon as it has been removed out of a system:
a.
b.
c.
d.
13.
Corrosion
Damaged seating surfaces
Failed springs
All of the above
Visual Inspection
Hydrotesting of valve body
Radiographic testing
Check set-pressure and leak tightness
Which of the following best describes a safety relief valve?
a. A spring – loaded pressure relieving device that is popped
open by enough static pressure in the huddling chamber
and kinetic energy of the gas or vapour to overcome the
spring force on the disc as it is lifted to provide full opening
and allow minimal overpressure
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b. A spring – loaded pressure relieving valve that acts as a
safety valve when used in gas or vapour service and as a
relief valve when used in liquid service.
c. A spring – loaded pressure relieving device for liquid
service that begins to open when the inlet pressure
reaches set pressure. Overcomes the spring force and
begins to lift the disc off the seat and that continues to
open as inlet pressure and the lift of the disc increase
allowing the flow
of the liquid to increase
d. All of the above
14.
Which of the following are reasons for inspection of pressure
relieving devices:
a.
b.
c.
d.
To protect personnel and equipment
To determine the condition of a device
To evaluate inspection frequency
All of the above
15.
Which of the following could cause flutter/chatter in valves?
16.
a.
b.
c.
d.
API 576
Improper material of construction
Overpressure
Erosion
Large length piping to the valve inlet from the vessel
does not address:
a. Valve testing on test benches in shop
b. Application of rupture discs
c. Training requirements for mechanics involved in
inspection and repair of pressure relieving devices
d. All of the above
17. If any settling is noticed on a vessel, which of the following
should be done:
a. Conduct RT after 48 hours of observing the defective
condition
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18.
19.
b. Nozzles and adjacent shell areas should be inspected for
distortion and cracking
c. Use acoustic emission monitoring
d. All of the above
Recommended resistance of electrical grounding connections is:
a. 5 ohms
b. 50 ohms
c. 100 ohms
d. none of the above
For vessels which are supported on concrete saddles and
working in an area where the humidity is high which areas on
them are typically susceptible to external corrosion?
a. At the anchor bolts in the foundation
b. At the Points of contact of the metal surface with the
concrete
c. All of the above
d. None of the above
20.
H2S is in sour crude is more harmful in presence of:
a.
b.
c.
d.
21.
The leak tightness of the relief valves is tested on the test block
at a pressure equal to:
a.
b.
c.
d.
22.
Oxygen
Water (i.e. Wet H2S)
Sulphur
‘a’ and ‘c’ above
Same as set pressure
90% of the set pressure
Same as reseat pressure
None of the above
During Hydrostatic testing, risk of brittle fracture, which of the
following action may be taken
a.
b.
at MDMT
Replace Hydro testing by pneumatic testing
Recalculate test pressure based on material stress
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c.
MDMT
d.
23.
a.
Conduct RT after 48 hours of observing the defective
condition
b.
Nozzles and adjacent shell areas should be inspected for
distortion and cracking
Use acoustic emission monitoring
All of the above
Which of the following are typical deterioration that can take
place on the external surfaces of vessels?
a.
b.
c.
d.
26.
CUI
Caustic embrittlement
Erosion
All of the above
The external surfaces of vessels should be examined not only for
corrosion but also for:
a.
b.
c.
d.
27.
AES type
BEM type
AEP type
CFU type
If any setting is noticed on a vessel, which of the following
should be done:
c.
d.
25.
None of the above
Which of the following classifications of heat exchangers would
have U-tubes incorporated into it?
a.
b.
c.
d.
24.
Carry out test at temperature more 300F above
Leaks
Cracks
Buckles
All of the above
Which of the following are commonly used techniques of surface
preparation for inspection:
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a.
b.
c.
d.
Wire brushing
Sand – blasting
High pressure water blasting
All of the above
28. According to API 510, authorized inspection agency is:
a.
b.
Jurisdiction organization
Insurance company which under writes insurance of
pressure vessels
Inspection organization of owner-user
Any of above
c.
d.
29. Repair Organization: According to API 510 is
a.
Holder of ASME certificate & appropriate code symbol
stamp
Owner-user
Contractor under contract with owner-user
Any of above
b.
c.
d.
30. For corrosion area of considerable size; thickness averaging along
most critical element shall not exceed following length for 72” ID
vessel.
a.
b.
c.
d.
20 inches
40 inches
30 inches
None of above
31. According to API 510 for ellipsoidal head, crown portion thickness
recalculation:
a.
b.
c.
d.
Crown can be taken as spherical portion of radius K1 x D
K1 depends on D/2h ratio
Crown lies within concentric circle of 80% shell diameter
All of above
32. For non-continuous corrosive service with remaining life 25 years,
external inspection shall be performed after:
a. 10 years
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b. 12.5 years
c. 5 years
d. None of above
33. Inspection records shall have following information
a.
b.
c.
d.
34.
According to API-510, restoration by welding of parent metal
loss may be made by using by electrodes having tensiles
strength:
a.
b.
c.
d.
35.
Same as parent material
Higher than parent material
Lower than parent material
All of the above
For all repairs and alterations under API 510, the ultimate
responsibility rests with
a.
b.
c.
d.
36.
Design & Construction records (permanent)
Running inspection records
Repair and alteration records
All of above
Owner user
API Committee
API-510 Inspector
Jurisdiction authority
“Hot tapping” means
a. Light tapping of vessel by ball point hammer to find leakages
when the vessel is operating at working temperature.
b. Cutting the threads in the help of tap and die when material
hot so as to make the cutting of threads easier
c. Act of providing new tapping connection while the vessel is in
operation
d. Tapping hot water samples from process plants for analysis
purpose
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37.
Which of the following is an advantage of magnetic particle
testing over penetrant testing?
a. can detect surface discontinuities with foreign material
imbedded in them
b. It is faster on individual parts
c. It can detect near-surface discontinuities
d. All of the above
38.
In an A-scan presentation, the amplitude of vertical indications
on the screen represents the
a. Amount of ultrasonic sound energy returning to the search
unit
b. Distance traveled by the search unit
c. Thickness of material being tested
d. Elapsed time since the ultrasonic pulse was generated
39.
The nondestructive examination method to be used for a
particular inspection should be determined by the:
a. availability of certified NDE examiners.
b. length of time since the last inspection.
c. age of the component to be inspected.
d. type, location, and orientation of the expected flaws.
40. Which of the following statements is true?
a.
b.
c.
d.
All defects are not discontinuities.
All discontinuities are defects.
Discontinuities are rejectable defects.
Defects are rejectable discontinuities.
41. Which of the following search unit would contain the thinnest
quartz crystal?
a.
b.
c.
d.
A 1 megahertz search unit
A 5 megahertz search unit
A 15 megahertz search unit
A 25 megahertz search unit
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42.
Which of the following can be magnetized?
a.
b.
c.
d.
43.
Why are magnetic particles available in different colors?
a.
b.
c.
d.
44.
Iron
Nickel
Cobalt
All of the above
For color contrast with the part surface.
To enhance the detection of indications.
Both a and b.
Different colors are used with different magnetic flux values.
Visual testing is a
a. Nondestructive testing techniques applicable for surface and
internal discontinuities
b. Nondestructive testing techniques applicable for surface
discontinuities only.
c. Destructive testing techniques applicable for surface and
internal discontinuities.
d. Destructive testing techniques applicable for internal
discontinuities only.
45.
Incase of horizontal insulated vessel most likely location of CUI
will be:
a.
b.
c.
d.
46.
Under belly areas
At the top in lengthwise area
In 3 O’clock and 9 o’clock position
Uniformly all over
The rate of erosion varies as:
a.
b.
c.
d.
Square of fluid velocity
Linearly with velocity
Varies as cube of velocity
Varies as square root of velocity
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47.
For testing relief valves for set pressure:
a.
b.
c.
d.
48.
49.
Only air shall be used
Only water shall be used
The combination may be used
Only nitrogen shall be used irrespective of service condition
Cracks and laminations look similar from surface however,
generally:
a. Cracks run normal to vessels surfaces
b. Lamination runs slant or parallel to surface
c. a and b above
d. None of above
Visual Testing can detect the following weld discontinuities.
a. Undercut
b. Crater crack
c. Excessive reinforcement
d. Allof the above
50.
What probe would be chosen to detect the smallest defect if
steel specimen with a velocity 6 x 106 mm/sec is to be
inspected?
a.
b.
c.
d.
51.
2 MHz
10 MHz
5 MHz
6 MHz
Austenitic S.S. is considered as good Cryogenic material because:
a. Because of its good corrosion resistance
b. Because of its good tensile Strength
c. Because of its good yield Strength
d. Because of its good impact Strength
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SET-E
API 510 Preparatory Course
1.
For repairs on vessel walls, which have been subjected to
PWHT as a code requirement and made of P1 or P3 Steels,
(for which exemptions exist in ASME Sec. VIII Div 1 code,)
which of the following options may be adopted?
a. Conduct RT after 48 hours of completion of all hot work
b. Pre- heat to al least 3000F as an alternative to PWHT
after repair
c. Use acoustic emission monitoring
d. Ultrasonic testing
2.
2.
4.
HCl is more corrosive in refining sour crudes because:
a.
In presence of H2S, corrosion of iron by Hcl becomes
cyclic reaction regenerating Hcl.
b.
Hcl liberates chlorine in presence of sulphur which
causes stress corrosion cracking
c.
Hcl liberates Hydrogen in presence of sulphur
causing Hydrogen embrittlement.
d.
None of the above
“In austenitic stainless steels, in presence of chlorides
spontaneous failure may occur under combined action of
corrosion and tensile stress” What type of phenomenon is
described by this statement?
a.
Sensitization of stainless steel?
b.
Stress corrosion cracking
c.
Intergranular corrosion of stainless steels
d.
Chromium-decay of stainless steels
Sour crude is more corrosive than sweet crude because
a. Sour crude is heavier than sweet crude
b. Sweet crude has more waxing tendency (compared
to sour crude) which forms protective layer on
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metallic surfaces hence sweet crudes are less
corrosive.
c. Sour crude contains high content H2S and sulpher
compared to sweet crude which lead to several types
of corrosion
d. None of the above.
5.
In planning for an internal inspection of a vessel that has
acidic corrodents, what type and location of corrosion
would you expect to find on the vessel shell, away from
the welds?
a. Hydrogen induced cracking in the vapor space
b. Hydrogen embrittlement in the vapor space
c. Hydrogen blistering near the liquid level
d. Hydrogen embrittlement below the liquid level
6.
What can be done to extend the life of a vessel with a
corroded area in the shell plate 12 inches from the weld, a
joint efficiency of less than 1, and a corrosion thickness
currently near the minimum required thickness?
a. Recalculate t
using E < 1.
b. Recalculate t
using E = 1.
minimum
for current operating conditions
minimum
for current operating conditions
c. Recalculate t
minimum
for design conditions using E = 1.
d. Recalculate t
minimum
for design conditions using E < 1.
7. A pressure vessel constructed according to ASME Sec VIII Div
1 with shell thickness 7/8’’ (Material of Construction is
classified as P no 4 Gr. 1), repaired by using insert plates.
The requirement of radiography to be incorporated in repair
procedure shall be:
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a.
b.
c.
d.
8.
SA 516 Gr 70 specification the number 70 indicates:
a.
b.
c.
d.
9.
Stress-corrosion cracking
Erosion
Hydrogen embrittlement
Any of the above depending upon ambient conditions
H2S is in sour crude is more harmful in presence of:
a.
b.
c.
d.
12.
To protect personnel and equipment
To determine the condition of a device
To evaluate inspection frequency
All of the above
Shells of vessels adjacent to inlet impingement plates are
susceptible to:
a.
b.
c.
d.
11.
Minimum yield strength
Minimum ultimate tensile strength
Minimum % elongation
None of the above
Which of the following are reasons for inspection of
pressure - relieving devices:
a.
b.
c.
d.
10.
Full radiography
Spot radiography
May be a, or b depending on joint efficiency
Data is not adequate
Oxygen
Water (i.e. Wet H2S)
Sulphur
‘a’ and ‘c’ above
The leak tightness of the relief valves is tested on the test
block at a pressure equal to:
a.
b.
c.
d.
Same as set pressure
90% of the set pressure
Same as reseat pressure
None of the above
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13.
Which statement is correct?
a. ASME Section II B deals with consumables for welding
b. ASME Section V gives acceptance standards for NDT
examinations
c. PWHT can be carried out after Hydro test as a good
engineering practice
d. Lower the Carbon content, better the weldability
14.
The symbol which indicates ASME code stamping for
vessels manufactured to ASME Section VIII Div. 1 is:
a.
b.
c.
d.
15.
Which of the following is essential variable for procedure
qualification?
a.
b.
c.
d.
16.
U1
U2
U3
U
Welder used for welding
Weld edge preparation
Welding process
All of the above
Presence of hydrogen can cause which of
following defects at welds?
the
a. Slag
b. Under-bead Cracking
c. Lamination
d. All of the above
17. Which of the following method is most suitable for
detecting lamination in 25mm thick C.S. plate?
a.
b.
c.
d.
RT
UT
MT
PT
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18.
A stainless steel weld has a crack open to the surface.
Which NDT method will reveal it effectively ?
a. Liquid Penetrant.
b. Magnetic particle.
c. Radiography.
d. All of above.
19.
Procedure Qualification Record is a document which can be
revised time to time?
a.
b.
c.
d.
20.
Which of the following are areas on pressure vessel which
are susceptible to CUI?
a.
b.
c.
d.
21.
All the area which is below insulation
Insulated areas below steam vents
Insulated piping exposed to cooling tower mist
“b” and “c” above
Calculate the remaining life of a vessel subjected to
unoform rate of corrosion given the following data: Actual
thickness = 0.955 inch, Minimum thickness required =
0.755 inch Thickness at pervious inspection 5 years prior
to present inspection = 1.025 inch
a.
b.
c.
d.
22.
True
False
Depends on company policy
Depends on client of the company
20 years
14 years
28 years
None of the above
Corrosion under insulation (CUI) due to environmental
factors like humidity, moisture, will be more pronounced at
temperature:
a. 250F to 2500F
b. More than 2500F
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c. Other factors being same corrosion
temperature ranges will be same
d. None of above
23.
24.
in
above
Vessel MAWP for vertical vessel is measured at:
a. Top most point of vessel
b. Bottom most point of vessel
c. At the mid point between top & bottom
d. None of above
Hot tapping is best described by statement:
a. It is technique of preheating the part of vessel to
specified temperature and tapping with 1lb. rainded
hammer to detect wall thinning
b. It is technique of providing a tapping connection while
pipe system is in operation
c. It is technique of fixing a water tap on hot water lines
for use during winter
d. It is act of using the tap and die for threading when the
part is hot
25.
“CUI” is API 510 means:
a. Corrosion under inspection
b. Components under inspection
c. Corrosion under investigation
d. Corrosion under insulation
26. Inspection records contain the following information for a
particular thickness measurement location (TML) on a
dished head.(Thickness in inches)
Thicknes
s
Year
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0.500
0
0.425
5
0.400
10
On the basis of the information above, the long-term
corrosion rate for the location is:
a. 1 ½ mils per year
b. 5 mils per year
c. 10 mils per year
d. 100 mils per year
27.
A certain Weld in vessel (P1 material with exemptions in
ASME –VIII-Div. 1) was required to have PWHT initially
according to code requirement.
After 10 years when
repaired by welding is to be carried out. Performing PWHT
is found to be impracticable. What solution (according to
API-510) would you offer?
a. PWHT may be exempted, if proper NDE is carried out
b. Carry out Temper-bead welding as on alternative PWHT.
c. Carry out both Hydro-testing and Pneumatic Testing in
lieu of the PWHT
d. None of above would be acceptable solution
28.
Double wall Single image technique is used for the
radiography of:
a. Plate welds
b. Tubular products with outer diameter more than 3.5
inch.
c. Heavy castings
d. None of above
29.
Which of the following is a description of an “indication”?
a. A response or evidence resulting from the application of a
nondestructive evaluation technique
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b. A defect if it is of size greater than 3 mm
c. The light which is emitted from a signal
d. All of the above
30.
Welders carrying out repair/alteration according to API 510
shall be qualified according to:
a.
b.
c.
d.
31.
Which of the following represent grouping of weld-metals
in ASME IX?
a.
b.
c.
d.
32.
API 1104 welding qualification code
ASME Sec. IX code
Any one of a or b above
None of a or b above
P – Nos
F – Nos
S – Nos
A - Nos
A PQR was qualified in 5G position using a new welder. But
production welding is to be done in 2G position. Which of
the following are applicable as a minimum?
a. Both procedure and welder shall be re-qualified in 2G
position.
b. The qualified procedure can be used ,only welder needs
to be re-qualified
c. The welder is qualified, but the procedure needs requalification
d. Both procedure and welder need not be re-qualified.
33.
For a vessel, estimated remaining life is estimated as 7
years from now, next planned inspection shall not be later
than:
a. 7 Years
b. 3.5 Years
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c. 5 Years
d. 6 Years
34.
Calculate the remaining life and external insp. interval of a
vessel given the following data:
Actual thickness = 0.955 inch
Minimum thickness required = 0.755 inch
Thickness at previous inspection 5 years prior to present
inspection = 1.025 inch
a.
b.
c.
d.
35.
20 years, 10 years
14 years,5years
28 years, 10 years
None of the above
ASME Sec VIII Div. 1 specifies different acceptance level
for weld reinforcement, which of the following statements
are true in your opinion:
a. Permitted reinforcement
circ. seems
b. Permitted reinforcement
circ. seems
c. Permitted reinforcement
circ. seems
d. Permitted reinforcement
seems.
36.
for long. seems is higher than
for long. seems is lower than
for long. seems is same as
does not depend on location of
While deciding the governing thickness for crown portion
for corroded 2:1 ellipsoidal head, API 510 stipulates that &
crown thickness shall be calculated:
a. According to relevant ellipsoidal dished head formula
b. According to code formula for spherical heads with head
radius equal to 0.9 D, where D is shell dia meter.
c. Thickness of crown shall be same as knuckle thickness
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d. None of the above.
37.
For instrument calibration ( check Instrument response to
energy input in dB) in Ultrasonic Testing dB , amplitude
control linearity forms an important factor. The allowable
tolerance for amplitude height linearity (of the nominal
amplitude ratio) is:
a.
b.
c.
d.
38.
5%
10 %
15 %
20 %
Which of the following ASME Boiler and Pressure Vessel
Code sections are referenced in API 510?
a.
b.
c.
d.
39.
+
+
+
+
ASME Section V
ASME Section VIII
ASME Section IX
All of above
Which of the following is / are to be undertaken in case the
Service conditions of vessel are changed?
a. The vessel shall be hydro tested only.
b. The vessel shall be internally and externally inspected
before it is re-used.
c. The allowable conditions (MAWP, Temp. rating) for new
service shall be established and the next period of
inspection shall be established for the new service.
d. None of above
40.
The period between External inspections for vessels
(remaining life > 4 years) shall not exceed which of
following:
a. Smaller of: One half of the remaining life of the vessel
and 10 years
b. 5 years
c. The lesser of “a” and “b”
d. The higher of a. and b.
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41.
Materials used for making repair by welding in carbon steel
vessels shall have the following limitations?
a. They shall meet the requirements stipulated in NACE
MR 0175
b. The carbon content shall not be over 0.35%
c. The Carbon Equivalent shall not be over 0.35%
d. All of the above
42.
For carrying out temper – bead welding technique in lieu of
PWHT, which of the following is applicable?
a. The weld shall be deposited by GTAW process, with
Argon gas shielding
b. Weld metal shall be deposited by SMAW process using
low-Hydrogen electrodes
c. After depositing each layers of the weld, The weld shall
be DP checked
d. None of the above
43.
The period between internal or on-stream inspections shall
not exceed?
a. One half of the remaining life of the vessel (based on
corrosion rate)
b. 10 years
c. In cases where the safe working life is estimated to be
less than 4 years the inspection interval may be the full
remaining safe operating life up to a maximum of 2
years
d. Least of all above
44.
If rivet shank corrosion is anticipated for riveted vessels
what testing methods are recommended?
a. Tensile testing of equivalent sized revets
b. Hammer testing
c. RT at an angle to the shank axis
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d. Only “b” and “c”
45.
Which of the following classifications of heat exchangers
would have U-tubes incorporated into it?
a.
b.
c.
d.
46.
Which of the following are typical conditions found on the
external surfaces of vessels?
a.
b.
c.
d.
47.
CUI
settlement
distortions
All of the above
Which of the following are types of NDT methods?
a.
b.
c.
d.
49.
Hydrogen Blistering
Hydrogen embrittlement
CUI
All of the above
The external surfaces of vessels should be examined for:
a.
b.
c.
d.
48.
AES type
BEM type
AEP type
CFU type
Ultrasonic testing
Radiographic testing
Hammer testing
All of the above
How many tube sheets would a heat exchanger have which
incorporates U-tubes in it?
a.
b.
c.
d.
One
Two
Three
None of the above
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50.
Scheduling of refinery shutdowns for maintenance or
inspection is usually arranged through the collaboration of:
a.
b.
c.
d.
Process group
Maintenance group
Inspection group
All of the above
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SET-F
API 510 Preparatory Course
1.
An ellipsoidal head has an internal diameter of 76 inches and
depth of 21 inches (including a straight face dimension of 2
inches). What should its spherical (crown) radius be?
a.
b.
c.
d.
2.
A lead letter of B is kept between cassette and film in order to
know:
a.
b.
c.
d.
3.
The scatter in well within the limits- When B is darker
The scatter isn well within the limits- When B is lighter
For the purpose of measuring the intensification factor
As standard marking on radiographs.
Which of the following penetrant system is generally considered
least sensitive?
a.
b.
c.
d.
4.
76.9 inches
15.6 inches
68.4 inches
all of the above
Water-washable
Solvent removable
All equally sensitive
Post-emulsification
Which of the following is an advantage of magnetic particle
testing over penetrant testing?
a. It can detect surface discontinuities with foreign material.
b. Imbedded in them
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c. It is faster on individual parts.
d. It can detect near-surface discontinuities.
e. All of the above.
5.
Which of the following types of discontinuities is not normally
detected by radiography?
a.
b.
c.
d.
6.
Double wall Double image technique is used for the radiography
of:
a.
b.
c.
d.
7.
Plate welds
Tubular products with outer diameter less than 87.5 mm
Large pipes with outer diameter 200 mm and above
Heavy castings
The temperature measured at a weld layer is around 130 0C
during multipass welding. It is decided to carryout a surface NDT
method. Choose a best combination.
a.
b.
c.
d.
8.
Cracks
Incomplete penetration
Laminations
Slag
Penetrant testing with dry developer
Penetrant testing with fluorent penetrant
Magnetic particle testing with wet particles
Magnetic particle testing with dry particles
In a magnetic particle testing, an operator reported a surface
indication with the following dimensions. Major dimension is
6.0 mm and Minor dimension is 2.0 mm. But upon using a
powerful magnifier, later it was revealed that it is only 4 x 1.5
mm. The indication shall be:
a. accepted, as the magnifier shows indication within acceptance
standards
b. accepted, as it is not a major defect
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c. rejected, as the visual inspection using magnifier shows
critical indication
d. rejected, as the dimensions shown by the indication is above
acceptance standards
9.
In ultrasonic testing, during scanning, each pass of the search
unit shall overlap a minimum of:
a. 10 % of the transducer dimension parallel to the direction of
the scan
b. 10 % of the transducer dimension perpendicular to the
direction of the scan
c. 100 % of the transducer dimension parallel to the direction of
the scan
d. 100 % of the transducer dimension perpendicular to the
direction of the scan
10.
In the radiography, penetrameter is put on the job to:
a. Evaluate the image quality of the radiograph.
b. Measure the strength of the penetrating radiation.
c. Check the density of the radiograph.
d. All of above
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