CWB LEVEL 1 UPDATED QUESTIONS AND ANSWERS
GRADED A+
✔✔31 . For the GTAW process an electrode can carry much higher current without
overheating when it is
used on:
a) DCRP.
b) DCSP.
c) AC.
d) AC with high frequency.
e) AC with balanced wave. - ✔✔b) DCSP.
✔✔32. Which electrode would be used for all position welding, when severe impact
requirements must be
met?
a) E4924
b) E4948
c) E6218-BL3
d) E4918-1
e) E4312 - ✔✔d) E4918-1
✔✔33. Select the correct penetrameter thickness for 2% sensitivity when radiographing
a weldment 1.25
inches in thickness.
a) 0.012 in.
b) 0.015 in.
c) 0.025 in.
d) 0.030 in. - ✔✔c) 0.025 in.
✔✔34. A guided root bend test on a weld test specimen would show:
a) The weld ductility by measuring the difference in distance between gauge marks.
b) Excessive reinforcement.
c) The integrity of the face-weld .
d) Lack of penetration or fusion .
e) HAZ properties. - ✔✔d) Lack of penetration or fusion .
✔✔35. Acetylene cannot be used safely at pressures greater than:
a) 103 Kpa (15 psi).
b) 172 Kpa (25 psi).
c) 310 Kpa (45 psi).
d) 552 Kpa (80 psi).
e) 15167 KPa (2200 psi). - ✔✔a) 103 Kpa (15 psi).
✔✔36. When assessing radiographic image sensitivity during weld inspection:
,a) Hole-type image quality indicators always provide a more reliable method of
assessment.
b) Wire-type image quality indicators always provide a more reliable method of
assessment.
c) The type of image quality indicator to be used is dependent upon the type of radiation
source.
d) Either standard hole-type or wire-type image quality indicators, when used properly,
will
provide the necessary tool to carry out valid evaluation of exposure sensitivity.
e) Visual examination of the weld image should predominate over the appearance of the
image
quality indicator. - ✔✔d) Either standard hole-type or wire-type image quality indicators,
when used properly, will
provide the necessary tool to carry out valid evaluation of exposure sensitivity.
✔✔37. The use of shielding gas pre-purge and post purge in the GTAW process
enables:
a) The easier ionization of the arc gap.
b) The deoxidization of the parent plate in advance of the arc.
c) The welder to "see" the shielding gas flow before the weld commences.
d) The workpiece and the electrode to be protected from oxidization.
e) The workpiece and the torch to be cooled before and after welding. - ✔✔d) The
workpiece and the electrode to be protected from oxidization.
✔✔38. Which side of a fillet weld gauge is used for measuring the size of a concave
faced fillet weld?
a) Leg side.
b) Straight side.
c) Throat side.
d) Face side.
e) Toe side. - ✔✔c) Throat side.
✔✔39. In rad iographic inspection, the term "film density" is used to describe the:
a) Lightness or darkness of the image on the film.
b) Weight of the film .
c) Class of the film.
d) % of the welds which are exposed to radiographic inspection.
e) % of his time that the rad iographer spends exposing the film. - ✔✔a) Lightness or
darkness of the image on the film.
✔✔40. The two basic types of stud welding processes are:
a) Cold and pressure stud welding.
b) Capacitor discharge and arc stud welding .
c) Submerged arc and flux cored stud welding.
d) Flat and horizontal stud welding.
, e) Shop and field stud welding. - ✔✔b) Capacitor discharge and arc stud welding
✔✔41 . When the ultrasonic transducer or probe is in direct contact with the material
under test the
ultrasonic method is:
a) The shear wave method.
b) The longitudinal wave method.
c) The transverse wave method.
d) The angle beam technique.
e) Can be any of the above. - ✔✔e) Can be any of the above.
✔✔42. The liquid penetrant inspection method is an effective NOT method for:
a) Locating incomplete penetration in a double vee groove weld.
b) Detecting very fine indications of porosity beneath the weld surface.
c) Detecting lack of fusion at the root of a groove weld with a backing strip.
d) Locating internal undercutting in groove and fillet welds.
e) Locating very fine surface cracks in the weld cap providing it is clean and not too
rough. - ✔✔e) Locating very fine surface cracks in the weld cap providing it is clean and
not too rough.
✔✔44. A tension test has been carried out on a weld test specimen. Before the tension
test the diameter
was 0.505 in. At yield point the diameter was 0.375 in. What is the percent difference?
a) 12.8%
b) 25.7%
c) 34.6%
d) 53.4%
e) 74.1% - ✔✔b) 25.7%
✔✔45. Lamellar tears in weldments are usually found:
a) In the heat affected zone area.
b) In the root pass.
c) In thin wall fabrications welded with GMAW.
d) In the weld centreline.
e) Anywhere in the weld . - ✔✔a) In the heat affected zone area.
✔✔46. Select the cutting process that would provide the narrowest heat affected zone
when cutting 12.5
mm (0 .5 in) thick carbon steel.
a) Oxy-acetylene cutting.
b) Air-carbon arc cutting.
c) Oxy-propane cutting.
d) Plasma arc cutting.
e) Laser beam cutting - ✔✔e) Laser beam cutting
GRADED A+
✔✔31 . For the GTAW process an electrode can carry much higher current without
overheating when it is
used on:
a) DCRP.
b) DCSP.
c) AC.
d) AC with high frequency.
e) AC with balanced wave. - ✔✔b) DCSP.
✔✔32. Which electrode would be used for all position welding, when severe impact
requirements must be
met?
a) E4924
b) E4948
c) E6218-BL3
d) E4918-1
e) E4312 - ✔✔d) E4918-1
✔✔33. Select the correct penetrameter thickness for 2% sensitivity when radiographing
a weldment 1.25
inches in thickness.
a) 0.012 in.
b) 0.015 in.
c) 0.025 in.
d) 0.030 in. - ✔✔c) 0.025 in.
✔✔34. A guided root bend test on a weld test specimen would show:
a) The weld ductility by measuring the difference in distance between gauge marks.
b) Excessive reinforcement.
c) The integrity of the face-weld .
d) Lack of penetration or fusion .
e) HAZ properties. - ✔✔d) Lack of penetration or fusion .
✔✔35. Acetylene cannot be used safely at pressures greater than:
a) 103 Kpa (15 psi).
b) 172 Kpa (25 psi).
c) 310 Kpa (45 psi).
d) 552 Kpa (80 psi).
e) 15167 KPa (2200 psi). - ✔✔a) 103 Kpa (15 psi).
✔✔36. When assessing radiographic image sensitivity during weld inspection:
,a) Hole-type image quality indicators always provide a more reliable method of
assessment.
b) Wire-type image quality indicators always provide a more reliable method of
assessment.
c) The type of image quality indicator to be used is dependent upon the type of radiation
source.
d) Either standard hole-type or wire-type image quality indicators, when used properly,
will
provide the necessary tool to carry out valid evaluation of exposure sensitivity.
e) Visual examination of the weld image should predominate over the appearance of the
image
quality indicator. - ✔✔d) Either standard hole-type or wire-type image quality indicators,
when used properly, will
provide the necessary tool to carry out valid evaluation of exposure sensitivity.
✔✔37. The use of shielding gas pre-purge and post purge in the GTAW process
enables:
a) The easier ionization of the arc gap.
b) The deoxidization of the parent plate in advance of the arc.
c) The welder to "see" the shielding gas flow before the weld commences.
d) The workpiece and the electrode to be protected from oxidization.
e) The workpiece and the torch to be cooled before and after welding. - ✔✔d) The
workpiece and the electrode to be protected from oxidization.
✔✔38. Which side of a fillet weld gauge is used for measuring the size of a concave
faced fillet weld?
a) Leg side.
b) Straight side.
c) Throat side.
d) Face side.
e) Toe side. - ✔✔c) Throat side.
✔✔39. In rad iographic inspection, the term "film density" is used to describe the:
a) Lightness or darkness of the image on the film.
b) Weight of the film .
c) Class of the film.
d) % of the welds which are exposed to radiographic inspection.
e) % of his time that the rad iographer spends exposing the film. - ✔✔a) Lightness or
darkness of the image on the film.
✔✔40. The two basic types of stud welding processes are:
a) Cold and pressure stud welding.
b) Capacitor discharge and arc stud welding .
c) Submerged arc and flux cored stud welding.
d) Flat and horizontal stud welding.
, e) Shop and field stud welding. - ✔✔b) Capacitor discharge and arc stud welding
✔✔41 . When the ultrasonic transducer or probe is in direct contact with the material
under test the
ultrasonic method is:
a) The shear wave method.
b) The longitudinal wave method.
c) The transverse wave method.
d) The angle beam technique.
e) Can be any of the above. - ✔✔e) Can be any of the above.
✔✔42. The liquid penetrant inspection method is an effective NOT method for:
a) Locating incomplete penetration in a double vee groove weld.
b) Detecting very fine indications of porosity beneath the weld surface.
c) Detecting lack of fusion at the root of a groove weld with a backing strip.
d) Locating internal undercutting in groove and fillet welds.
e) Locating very fine surface cracks in the weld cap providing it is clean and not too
rough. - ✔✔e) Locating very fine surface cracks in the weld cap providing it is clean and
not too rough.
✔✔44. A tension test has been carried out on a weld test specimen. Before the tension
test the diameter
was 0.505 in. At yield point the diameter was 0.375 in. What is the percent difference?
a) 12.8%
b) 25.7%
c) 34.6%
d) 53.4%
e) 74.1% - ✔✔b) 25.7%
✔✔45. Lamellar tears in weldments are usually found:
a) In the heat affected zone area.
b) In the root pass.
c) In thin wall fabrications welded with GMAW.
d) In the weld centreline.
e) Anywhere in the weld . - ✔✔a) In the heat affected zone area.
✔✔46. Select the cutting process that would provide the narrowest heat affected zone
when cutting 12.5
mm (0 .5 in) thick carbon steel.
a) Oxy-acetylene cutting.
b) Air-carbon arc cutting.
c) Oxy-propane cutting.
d) Plasma arc cutting.
e) Laser beam cutting - ✔✔e) Laser beam cutting
