CWB Level 2 Closed Book
A backing gas is used to:
a) Keep root burn-through at bay. b) Reduce root concavity.
c) Provide support for the hot root metal. d) Avoid contamination with root oxide - ANSd)
Avoid contamination with root oxide A: is a crack that runs parallel to the length of the weld.
a) Transverse crack.
b) Crack running longitudinally. c) Throat crack.
d) Crack in the underbead; ANSa) Crack in the transverse A benefit of using an AC welding
circuit is: a) It works best on thin materials when used with large electrodes. b) It is best used
with small electrodes on thin sections.
c) It aids in the elimination of arc blow. d) It helps eliminate arc blow and reduces internal
undercut (ANSc). On a weld's radiograph, a dense, irregular white spot can be seen. Which
of the processes listed below, assuming the welding process was to blame, would be
responsible? a) SMAW process.
b) GTAW process.
c) The GMAW procedure. d) ST process.
e) ESW process. - ANSb) GTAW process.
The following factors typically determine whether ultrasonic testing-detected weld
discontinuities are accepted or rejected: a) Linearity up the sides. b) Time base analysis.
c) Data from horizontal responses d) The ratio of signal to noise. e) Signal amplitude. -
ANSe) Signal amplitude.
Constant potential power sources with the slope control are used for which type of mode of
transfer?
a) Transfer of glories b) Spreading by spray c) Transfer of pulsed current. d) The transfer of
a short circuit e) Axial spray transfer. - ANSd) Short circuit transfer.
What would be the distance represented by a distance of 6 cm on the drawing when it was
made to a scale of 1:50? a) 12 cm.
b) 30 cm.
c) 50 cm.
d) 240 cm.
e) 300 cm. - ANSe) 300 cm.
The use of a is referred to as reverse polarity. a) An electrode and an AC power source b)
An electrode and a DC power source c) AC power source, electrode -
d) A DC power source with an electrode - ANSb) A DC power source with an electrode +
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. - ANSc) 0.025 in.
When cutting carbon steel that is 12.5 millimeters (0.5 inches) thick, choose the cutting
method that will result in the narrowest heat-affected zone. a) Cutting with oxyacetylene b)
Air-carbon arc cutting.
A backing gas is used to:
a) Keep root burn-through at bay. b) Reduce root concavity.
c) Provide support for the hot root metal. d) Avoid contamination with root oxide - ANSd)
Avoid contamination with root oxide A: is a crack that runs parallel to the length of the weld.
a) Transverse crack.
b) Crack running longitudinally. c) Throat crack.
d) Crack in the underbead; ANSa) Crack in the transverse A benefit of using an AC welding
circuit is: a) It works best on thin materials when used with large electrodes. b) It is best used
with small electrodes on thin sections.
c) It aids in the elimination of arc blow. d) It helps eliminate arc blow and reduces internal
undercut (ANSc). On a weld's radiograph, a dense, irregular white spot can be seen. Which
of the processes listed below, assuming the welding process was to blame, would be
responsible? a) SMAW process.
b) GTAW process.
c) The GMAW procedure. d) ST process.
e) ESW process. - ANSb) GTAW process.
The following factors typically determine whether ultrasonic testing-detected weld
discontinuities are accepted or rejected: a) Linearity up the sides. b) Time base analysis.
c) Data from horizontal responses d) The ratio of signal to noise. e) Signal amplitude. -
ANSe) Signal amplitude.
Constant potential power sources with the slope control are used for which type of mode of
transfer?
a) Transfer of glories b) Spreading by spray c) Transfer of pulsed current. d) The transfer of
a short circuit e) Axial spray transfer. - ANSd) Short circuit transfer.
What would be the distance represented by a distance of 6 cm on the drawing when it was
made to a scale of 1:50? a) 12 cm.
b) 30 cm.
c) 50 cm.
d) 240 cm.
e) 300 cm. - ANSe) 300 cm.
The use of a is referred to as reverse polarity. a) An electrode and an AC power source b)
An electrode and a DC power source c) AC power source, electrode -
d) A DC power source with an electrode - ANSb) A DC power source with an electrode +
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. - ANSc) 0.025 in.
When cutting carbon steel that is 12.5 millimeters (0.5 inches) thick, choose the cutting
method that will result in the narrowest heat-affected zone. a) Cutting with oxyacetylene b)
Air-carbon arc cutting.
