Cwi Part C

Question 1

When qualifying repair welders for in-service piping,
which of the following is true?
A. The piping shall be subject to accelerated cooling
during the repair welding
B. The welder shall follow the details of a qualified
WPS
C. A single weld may be used to qualify more than
one welder
D. The welder shall prepare the repair groove prior
to welding

Answer 1

C

Question 2

Inspection of weld repairs requires:
A. All repairs be re-radiographed
B. All repairs be ultrasonically tested
C. All repairs be magnetic particle inspected
D. The repaired areas be inspected by the same
means previously used

Answer 2

D

Question 3

What is the minimum CTOD value for use with
alternative acceptance criteria?
A. 0.002 inch for all six specimens
B. 0.002 inch for all three specimens
C. 0.002 inch for three of the six specimens
D. 0.002 average for all specimens

Answer 3

A

Question 4

A welder who successfully completes a multiple
qualification using E71T-1M filler metal is qualified to use
which other filler metal?
A. EXX18-XX
B. ERXXS-6
C. EXX-1XXM
D. RG-60

Answer 4

C

Question 5

Which of the following testing methods may not be
used?
A. VT
B. RT
C. PT
D. Trepanning

Answer 5

D

Question 6

Which of the following minimum specified preheat
temperatures would be acceptable on a WPS if the
procedure test had been welded with a preheat of 250F?
A. 32 F
B. 150 F
C. 200 F
D. 250 F

Answer 6

D

Question 7

Which of the following is not considered an essential
variable for mechanized welding?
A. A change from a V to a U groove
B. A change in filler metal diameter from 1/8 in. to
1/16 in.
C. An increase in time between the first fill pass and
the first cap pass
D. A change in plasma gas orifice diameter

Answer 7

C

Question 8

For hydrogen cracking to occur, three conditions must
be satisfied simultaneously. These conditions are
hydrogen in the weld, the development of a crack-
susceptible weld microstructure and:
A. Yield strength of the material
B. A pipe wall thickness less than 0.250 in.
C. A pipe wall thickness more than 0.250 in.
D. Tensile stress acting on the weld

Answer 8

D

Question 9

For a welder qualification on 0.500 in. wall thickness
and 6 in. diameter, the number of destructive test
specimens required is:
A. 4
B. 6
C. 8
D. 16

Answer 9

A

Question 10

Parallel elongated slag inclusion (ESI) indications
separated by approximately the width of the root bead
shall be considered a single indication unless the width of
either of the indications exceeds 1/16 inch.
A. True
B. False
C. True if no other indications exist
D. True if SMAW was used for the welding

Answer 10

B

Question 11

How shall the size, location, and dimensions of all
imperfections accepted in accordance with Appendix A be
recorded?
A. On suitable forms
B. On the radiography test report
C. On the ultrasonic test report
D. On company letterhead

Answer 11

A

Question 12

Which of the following are acceptable means for
welders to identify their work?
A. Stenciling their identification symbol adjacent to
the weld
B. Recording their identification symbol on a weld
map
C. Writing their identification symbol adjacent to the
weld using a permanent marker
D. Any method prescribed by the company

Answer 12

D

Question 13

Which of the following is not an essential variable for
welding procedure qualification when using Alternative
Acceptance Criteria for girth welds?
A. A change in current
B. A change in the nominal wall thickness +/- 3/16 in.
C. A change in the number of weld passes for a given
thickness
D. A change in the welding process or method of
application

Answer 13

C

Question 14

For computed radiography, the image intensity
withing the area of interest shall not be less than how
much?
A. 45% of the system’s bit depth capability
B. 1.8 of the H&D density
C. 5% of the essential hole diameter
D. The adjacent base metal

Answer 14

A

Question 15

The type and number of tests performed when
qualifying a welding procedure for an in service fillet
weld with a wall thickness of 0.719 inch are:
A. 2 tensile, 2 root, 2 face bend
B. 2 tensile, 2 nick-break, 4 side bend
C. 2 nick-break, 4 face bend
D. 4 nick-break, 4 face bend, 4 macro test

Answer 15

D

Question 16

How many options are used in Annex A for the
determination of acceptance limits of planar
imperfections?
A. 2
B. 3
C. 4
D. 5

Answer 16

B

Question 17

A welding operator may be required to re-qualify:
A. If they have not welded in the past 6 months
B. If they have not used the identical welding unit in
one year
C. If a question arises about their competence
D. When a new edition of the code is published

Answer 17

C

Question 18

When using MT, relevant indications are those caused
by:
A. Defects
B. Imperfections
C. Internal stresses
D. External stresses

Answer 18

B

Question 19

When calibrating MUT systems, what percentage of
the screen height shall be used to establish the baseline
sensitivity from the initial calibration reflector?
A. 80%
B. 75
C. 50%
D. 25%

Answer 19

A

Question 20

For procedure qualification, the exposed surfaces of
each nick-break test shall show:
A. No slag inclusions over 1/4 inch
B. At least 3/4 inches of sound weld metal between
inclusions
C. Complete penetration and fusion
D. The tensile strength of the sample

Answer 20

C

Question 21

CVN tests for alternative acceptance criteria shall be
acceptable if:
A. The average absorbed energy for each set of
three specimens equals or exceeds 30 ft-lb
B. The maximum individual absorbed energy for
each set of three specimens equals or exceeds
22 ft-lb
C. The minimum individual absorbed energy for each
of the three specimens is less than 30 ft-lb
D. The average absorbed energy for each specimen
exceeds 30 ft-lb

Answer 21

A

Question 22

A weld was made on a pipe that had a wall thickness
of 9.5 mm with 1.5 mm of face reinforcement and no
root reinforcement. What is the essential wire diameter
of an ASTM E 747 IQI?
A. 0.010 in.
B. 0.013 in.
C. 0.016 in.
D. 0.020 in.

Answer 22

B

Question 23

All welders performing repair work should be familiar
with the safety precautions associated with cutting and
welding on piping that contains or has contained crude
petroleum, petroleum products, or fuel gases. Additional
guidance can be found in:
A. ANSI Z49.1
B. API RP 2201
C. API RP 1570
D. AWS A3.0

Answer 23

B

Question 24

Which of the following is not a requirement for the
procedure for film radiography?
A. Intensifying screens
B. Exposure conditions
C. Processing
D. Film manufacturer

Answer 24

D

Question 25

When using Annex A, the results of the ECA for Option 1 should be presented how? A. In the FAD B. In a user friendly format C. In a graph D. In a stress analysis

Answer 25

B

Question 26

For hardness testing of a back weld repair procedure at the weld centerline, the HAZ impression closest to the surface must be: A. No more than 3/32 in. deep B. No more than 5/64 in. deep C. Entirely within the fusion zone D. At locations specified by the company

Answer 26

B

Question 27

When subsized Charpy impact specimens are used, they should have at least how much of the wall thickness of the test coupon? A. 80% B. 75% C. 50% D. 25%

Answer 27

A

Question 28

When inspection in-service welds, longer delay times: A. Decrease the chance that cracking can occur after inspection has been completed B. Increase the chance that cracking can occur after inspection has been completed C. Should not be considered for time of inspection D. Probability of cracking has no importance of determining delay time

Answer 28

A

Question 29

Option 1 of Alternative Acceptance Criteria is limited to CTOD toughness of: A. Equal to or greater than 0.010 in. B. Less than 0.010 in. C. Greater than 0.004 in. D. Equal to or greater than 0.004 in.

Answer 29

D

Question 30

When inspecting a pipe weld on 8 inch schedule 40(.322 wall) you mechanically measure some undercut at the face to be 0.015 inch deep and 3 inches long. The undercut is: A. Not acceptable B. Acceptable C. Not acceptable because length of undercut exceeds 2 inches D. Not enough information given

Answer 30

B

Question 31

Transverse indications (other than cracks) shall be considered volumetric and evaluated using the criteria for volumetric indications. Which of the following shall be used to designate all reported transverse indications? A. TI B. VI C. TC D. T

Answer 31

D

Question 32

When performing a nick-break test, the exposed area of the fracture shall be at least how wide? A. 1/16 inch B. 1/8 inch C. 1/2 inch D. 3/4 inch

Answer 32

D

Question 33

The required axial stress analysis for use of Annex A requires which of the following? A. Evaluation of stresses during construction and installation B. Evaluation of stresses induced by operational and environmental conditions C. Evaluation of stress induced by temperature changes during operation D. Evaluation of stresses during construction and operation

Answer 33

D

Question 34

Face bend specimens for branch and sleeve welds where wall thickness is greater than 0.500 inch: A. A 2 inch radius plunger must be used B. Two side bends shall be substituted C. It may be reduced to 0.500 inch by machining the outside surface D. It may be reduced to 0.500 inch by machining the inside surface

Answer 34

D

Question 35

Company authorization is required for which of the following types or repairs? A. Shallow crater crack B. Back weld C. Rework D. Triple repair

Answer 35

B

Question 36

IPD shall be unacceptable when: A. The length of an individual IPD indication exceeds 1 in. B. The length of an individual IPD indication exceeds 2 in. C. The aggregate length of IPD indications exceeds 2 in. in any continuous 12 in. weld length D. The aggregate length of an IPD indication exceeds 8%

Answer 36

B

Question 37

A record of certified nondestructive testing personnel shall be kept by the company. Level I and Level II NDT personnel shall be recertified at least every: A. Year B. 2 years C. 4 years D. 5 years

Answer 37

D

Question 38

Which of the following environmental conditions may have a negative effect on fatigue life? A. Water, brine, and aqueous solutions that contain CO2 or H2S B. Stress intensity C. Loading cycles D. All of these are correct

Answer 38

D

Question 39

Which of the following organizations is headquartered in Houston, Texas? A. AWS B. ASNT C. API D. NACE

Answer 39

D

Question 40

When pipe is welded above ground, the working clearance around the pipe should not be less than: A. 12 in. B. 14 in. C. 18 in. D. 16 in.

Answer 40

D

Question 41

What is the primary purpose of Annex A? A. To define the procedure for CTOD and CVN testing B. To delineate between circumferential and axial stresses in pipelines C. To define the effect of various anomalies on the suitability of the whole weld for a specific service D. To describe the use of fracture mechanics analysis and fitness for purpose criteria in establishing a more rigorous imperfection allowance

Answer 41

C

Question 42

During welder qualification, when destructive testing pipe with a diameter less than or equal to 1.315 inches: A. Radiography must be used B. The entire pipe must be used for bend testing C. One full-section tensile specimen may be substituted for the root-bend and nick-break specimens D. This diameter may not be destructively tested

Answer 42

C

Question 43

Annex B covers recommended welding practices for which of the following? A. Repairs to piping systems that have been completely isolated and decommissioned B. Repairs to pipeline components in the process of fabrication prior to being put in service C. Repairs to pipelines that are in-service and contain petroleum products or fuel gases D. Appurtenances on decommissioned pipelines

Answer 43

C

Question 44

For multiple qualification of a welder on a full-size branch-on-pipe connection the weld shall be made with the run-pipe axis: A. Extending vertically downward B. Extending vertically upward C. In the flat position D. In the horizontal position

Answer 44

D

Question 45

The stress analysis required for girth welds shall include consideration of potential dynamic loading on girth welds such as: A. Wind loads B. Earthquake loads C. Loads from closing of check valve D. Welding stresses

Answer 45

C

Question 46

What is the maximum radius of the die on a bend test fixture? A. 1-3/4 inches B. 2 inches C. 2-5/16 inch D. 2-1/2 inches

Answer 46

C

Question 47

When radiography is being used, in order that the proper weld and any imperfections in the weld can be quickly and accurately located, images shall be clearly identified by: A. Lead numbers B. Lead letters C. Markers D. All of these are correct

Answer 47

D

Question 48

A welder who successfully completes the qualification in Section 6.2.1 on 8 inch, schedule 40 pipe (0.322 inch wall) must be requalified if: A. The welding process is changed from SMAW to GMAW B. The welder changes the welding direction from horizontal left to horizontal right C. There is a change in filler metal classification from E7018 to E8018 D. The welder welds on 6 inch, schedule 40 (0.280 inch wall) pipe

Answer 48

A

Question 49

The exposed surfaces of each fillet-weld-break specimen shall show: A. No slag inclusions greater than 1/4 inch B. At least 3/4 inches sound metal between adjacent inclusions C. Complete penetration and fusion D. No porosity greater than 1/4 inch in diameter

Answer 49

C

Question 50

Which of the following processes can not be used for mechanized welding with filler metal additions? A. Flash butt welding B. PAW C. GMAW-S D. GTAW

Answer 50

A

Question 51

Macroetch specimens for in-service welding shall receive how many indentions for hardness testing? A. 2 B. 4 C. 5 D. 6

Answer 51

C

Question 52

Which of the following apply to star cracks? A. They are the result of vibrations during welding B. They are the result of weld metal contractions during solidification C. They must be ground out and repair welded D. They are located at the start of weld beads

Answer 52

B

Question 53

When determining the inspection error and safety factor on allowable imperfection size using Option 3, what shall be reduced by the inspection error extracted from NDT qualification results of qualified inspection systems/procedure/operator for the specific project with similar material and welding procedure? A. The flaw width B. The allowable flaw height C. The volume of the flaw D. The flaw length

Answer 53

B

Question 54

Shielding gasses shall not be: A. Stored away from extremes of temperature B. Field intermixed C. Used if their content is known D. All of these are correct

Answer 54

B

Question 55

Using UT, the company shall ensure what minimum length at each pipe end shall be free of any full or partial beam reflectors that could influence production weld inspection? A. 2 inches B. 4 inches C. 6 inches D. 8 inches

Answer 55

B

Question 56

The number of full section tensile-strength specimens for API 5L Grade X42 pipe 1.315 inch in outside diameter is: A. 0 B. 1 C. 2 D. 4

Answer 56

A

Question 57

Acceptance limits for buried slag in a girth weld according to Annex A is: A. Lesser of t/4 or 0.25 in. in width and lesser of t/4 or 0.25 in. in length B. Lesser of t/4 or 0.25 in. in width and 0.25 in. in length C. Lesser of t/4 or 0.25 in. in width and t/4 in length D. Lesser of t/4 or 0.25 in. in width and 4t in length

Answer 57

D

Question 58

A standard WPS was qualified using 0.500 in. thick pipe. What range of thicknesses is qualified by this? A. 0.500 to 1 in. B. 0.154 to 1 in. C. 0.250 to unlimited D. 0.375 to 0.625 in.

Answer 58

B

Question 59

For in-service fillet welds, specified minimum yield strength is: A. An essential variable B. Not an essential variable C. Is an essential variable if the pipe and fitting yield strength is less than or equal to 42 ksi D. Is an essential variable if the pipe and fitting yield strength is greater than 42 ksi but less than 65

Answer 59

B

Question 60

If adjacent imperfections are close enough, they may behave as single larger imperfections. This describes: A. Cluster porosity B. Imperfection interaction C. Stacked defects D. A repair area

Answer 60

B