CWI Part C Practice Exam Questions
and Answers
If notch toughness of welded joints is required, which of the following shall specify the
minimum absorbed energy / test temperature on the contract documents.
Building owner
Building official
Engineer
AWS CWI ANSWERS Engineer
Which of the following is the minimum diameter of the hole for a plug weld on 1" thick
plate?
1"
1 5/16"
5/8"
1 1/8" ANSWERS 1 5/16"
In regard to PJP groove welds, which of the following shall indicate the weld groove
depths ("D") needed to attain the required for the welding process and position of
welding to be used.
weld size
"S"
Z-Loss ANSWERS weld size and "S"
Steel backing of the welds used in buildings need not be removed unless required by
the:
building official
architect
stress design category
special inspector ANSWERS stress design category
The width of a slot weld on a 3/4" thick plate shall be a minimum of:
3/4"
1"
1 1/8"
1 1/16" ANSWERS 1 1/16"
The ends of a slot for a slot weld shall be semicircular or shall have the corners rounded
to a radius not less than:
1/2"
the thickness of the weld
,the thickness of the part
1" ANSWERS the thickness of the part
The sum of diameters of visible piping porosity in fillet welds, for statically loaded
structures in any 12 inches length of weld shall not exceed: a. 3/8" b. 3/4" c. 5/16" d.
3/16" ANSWERS 3/4"
Recalibration of an ultrasonic instrument shall be made after a change of operator or
after each _________ maximum time interval. a. 30 minutes b. 2 hour c. 40 hours d. 4
hours e. 8 hour shift ANSWERS 2 hour
When magnetic particle testing is used, the procedure shall be in accordance with
ASTM: a. E 165 b. E 709 c. E 142 d. E 94 ANSWERS E 709
The horizontal linearity of an ultrasonic test instrument shall be requalified after each
___________ of instrument use. a. two months b. work shift c. 40 hours d. operators
ANSWERS 2 months
For loaded structures in tension, the scanning level for ultrasonic testing with a sound
path to 5", the above zero reference dB shall be: a. 30 b. 10 c. 20 d. 25 ANSWERS
25
The length of a slot to be welded shall not exceed:
ten times the thickness of the part
2 1/4 times the thickness of the part
ten times the depth of the weld
the width of the slot plus 1/8" ANSWERS ten times the thickness of the part
Which of the following shall be shown on the plans of complete details?
location
type
size ANSWERS location
type
size
In regard to lap joints carrying stress, the minimum amount of lap shall be five times the
thickness of the thinner part joined but not less than:
the thickness of the part
the size of the weld
5"
1" ANSWERS 1"
The minimum depth of filling of a slot weld in base metal 1" thick shall be:
1/2"
5/8"
3/4"
, 1" ANSWERS 5/8"
Side or end returns for fillet welds shall be returned continuously around a corner for a
distance of:
2"
1"
2 to 4 times the size of the weld
a distance of the size of the weld ANSWERS 2 to 4 times the size of the weld
T-joints in which the angle between joined parts is _____ greater than 100° or less than
80° shall be defined as skewed T-joints.
greater than 110° or less than 70°
greater than 100° or less than 80°
less than 100° or greater than 80°
none of the above ANSWERS less than 100° or greater than 80°
In built-up tension members, the longitudinal spacing of stitch welds connecting a plate
component to other components, or connecting two plate components to each other,
shall not exceed 12" or _______ times the thickness of the thinner plate.
10
20
24
30 ANSWERS 24
When weld access holes are required, they shall be sized to provide clearances
necessary ______.
a minimum radius of 1 ½'
and approved by the welder foreman
and maintain the axial tension parameter of the electrode used
for deposition of sound weld metal ANSWERS for deposition of sound weld metal
In compression members the longitudinal spacing of stitch welds connecting two plate
components or a plate component to other components shall not exceed 24 times the
thickness of the thinner plate or:
16"
10"
6"
12" ANSWERS 12"
The minimum length of an intermittent fillet weld shall be:
1"
3"
1 1/2"
3/4" ANSWERS 1 1/2"
and Answers
If notch toughness of welded joints is required, which of the following shall specify the
minimum absorbed energy / test temperature on the contract documents.
Building owner
Building official
Engineer
AWS CWI ANSWERS Engineer
Which of the following is the minimum diameter of the hole for a plug weld on 1" thick
plate?
1"
1 5/16"
5/8"
1 1/8" ANSWERS 1 5/16"
In regard to PJP groove welds, which of the following shall indicate the weld groove
depths ("D") needed to attain the required for the welding process and position of
welding to be used.
weld size
"S"
Z-Loss ANSWERS weld size and "S"
Steel backing of the welds used in buildings need not be removed unless required by
the:
building official
architect
stress design category
special inspector ANSWERS stress design category
The width of a slot weld on a 3/4" thick plate shall be a minimum of:
3/4"
1"
1 1/8"
1 1/16" ANSWERS 1 1/16"
The ends of a slot for a slot weld shall be semicircular or shall have the corners rounded
to a radius not less than:
1/2"
the thickness of the weld
,the thickness of the part
1" ANSWERS the thickness of the part
The sum of diameters of visible piping porosity in fillet welds, for statically loaded
structures in any 12 inches length of weld shall not exceed: a. 3/8" b. 3/4" c. 5/16" d.
3/16" ANSWERS 3/4"
Recalibration of an ultrasonic instrument shall be made after a change of operator or
after each _________ maximum time interval. a. 30 minutes b. 2 hour c. 40 hours d. 4
hours e. 8 hour shift ANSWERS 2 hour
When magnetic particle testing is used, the procedure shall be in accordance with
ASTM: a. E 165 b. E 709 c. E 142 d. E 94 ANSWERS E 709
The horizontal linearity of an ultrasonic test instrument shall be requalified after each
___________ of instrument use. a. two months b. work shift c. 40 hours d. operators
ANSWERS 2 months
For loaded structures in tension, the scanning level for ultrasonic testing with a sound
path to 5", the above zero reference dB shall be: a. 30 b. 10 c. 20 d. 25 ANSWERS
25
The length of a slot to be welded shall not exceed:
ten times the thickness of the part
2 1/4 times the thickness of the part
ten times the depth of the weld
the width of the slot plus 1/8" ANSWERS ten times the thickness of the part
Which of the following shall be shown on the plans of complete details?
location
type
size ANSWERS location
type
size
In regard to lap joints carrying stress, the minimum amount of lap shall be five times the
thickness of the thinner part joined but not less than:
the thickness of the part
the size of the weld
5"
1" ANSWERS 1"
The minimum depth of filling of a slot weld in base metal 1" thick shall be:
1/2"
5/8"
3/4"
, 1" ANSWERS 5/8"
Side or end returns for fillet welds shall be returned continuously around a corner for a
distance of:
2"
1"
2 to 4 times the size of the weld
a distance of the size of the weld ANSWERS 2 to 4 times the size of the weld
T-joints in which the angle between joined parts is _____ greater than 100° or less than
80° shall be defined as skewed T-joints.
greater than 110° or less than 70°
greater than 100° or less than 80°
less than 100° or greater than 80°
none of the above ANSWERS less than 100° or greater than 80°
In built-up tension members, the longitudinal spacing of stitch welds connecting a plate
component to other components, or connecting two plate components to each other,
shall not exceed 12" or _______ times the thickness of the thinner plate.
10
20
24
30 ANSWERS 24
When weld access holes are required, they shall be sized to provide clearances
necessary ______.
a minimum radius of 1 ½'
and approved by the welder foreman
and maintain the axial tension parameter of the electrode used
for deposition of sound weld metal ANSWERS for deposition of sound weld metal
In compression members the longitudinal spacing of stitch welds connecting two plate
components or a plate component to other components shall not exceed 24 times the
thickness of the thinner plate or:
16"
10"
6"
12" ANSWERS 12"
The minimum length of an intermittent fillet weld shall be:
1"
3"
1 1/2"
3/4" ANSWERS 1 1/2"
