CWB Level 2 Closed Book
A backing gas is used to:
a) Prevent root burn-via.
B) Reduce root concavity.
C) Support the molten root steel.
D) Prevent root oxide infection. - ANS-d) Prevent root oxide infection.
A crack perpendicular to the period of the weld is called a:
a) Transverse crack.
B) Longitudinal crack.
C) Throat crack.
D) Underbead crack. - ANS-a) Transverse crack.
An advantage of an AC welding circuit is:
a) It is nice used with large electrodes on skinny materials.
B) It is best used with small electrodes on skinny sections.
C) It enables to cast off arc blow.
D) It minimizes internal undercut. - ANS-c) It enables to do away with arc blow.
An abnormal, dense white spot is visible at the radiograph of a weld. Assuming it turned into
caused by the welding technique used, which one of the methods under could be
accountable?
A) SMAW technique.
B) GTAW technique.
C) GMAW method.
D) ST process.
E) ESW procedure. - ANS-b) GTAW process.
As a wellknown rule, weld discontinuities detected by ultrasonic testing are familiar or
rejected on the basis of:
a) Vertical linearity.
B) Time base evaluation.
C) Horizontal response records.
D) Noise to signal ratio.
E) Signal amplitude. - ANS-e) Signal amplitude.
Constant ability electricity sources with the slope control are used for which kind of mode of
switch?
A) Globular transfer.
B) Spray transfer.
C) Pulsed current switch.
, D) Short circuit transfer.
E) Axial spray transfer. - ANS-d) Short circuit transfer.
In generating a drawing for a scale of 1:50, what might be the distance represented with the
aid of a distance on the drawing of 6 cm?
A) 12 cm.
B) 30 cm.
C) 50 cm.
D) 240 cm.
E) three hundred cm. - ANS-e) 300 cm.
Reverse polarity refers to the use of a:
a) AC energy source, electrode +
b) DC strength source, electrode +
c) AC energy source, electrode -
d) DC electricity supply, electrode - - ANS-b) DC energy source, electrode +
Select the perfect penetrameter thickness for two% sensitivity when radiographing a
weldment 1.25 inches in thickness.
A) 0.012 in.
B) 0.1/2 in.
C) zero.0.5 in.
D) 0.030 in. - ANS-c) zero.Half in.
Select the slicing procedure that would offer the narrowest warmness affected region while
slicing 12.5 mm (zero.Five in) thick carbon steel.
A) Oxy-acetylene slicing.
B) Air-carbon arc slicing.
C) Oxy-propane slicing.
D) Plasma arc reducing.
E) Laser beam slicing - ANS-e) Laser beam reducing
Select the electrode that might be quality proper for welding excessive sulphur steels in the
flat function:
a) E4924
b) E4914
c) E4927
d) E4918 - ANS-d) E4918
The mechanical check used to determine the capability of a material to resist failure by way
of brittle fracture requires using:
a) A tensile take a look at specimen.
B) A bend check specimen.
C) A compression take a look at specimen.
D) An impact take a look at specimen.
E) A spectrographic take a look at. - ANS-d) An impact check specimen.
The resistance of steel to failure through brittle fracture is normally assessed with the aid of
engaging in a:
A backing gas is used to:
a) Prevent root burn-via.
B) Reduce root concavity.
C) Support the molten root steel.
D) Prevent root oxide infection. - ANS-d) Prevent root oxide infection.
A crack perpendicular to the period of the weld is called a:
a) Transverse crack.
B) Longitudinal crack.
C) Throat crack.
D) Underbead crack. - ANS-a) Transverse crack.
An advantage of an AC welding circuit is:
a) It is nice used with large electrodes on skinny materials.
B) It is best used with small electrodes on skinny sections.
C) It enables to cast off arc blow.
D) It minimizes internal undercut. - ANS-c) It enables to do away with arc blow.
An abnormal, dense white spot is visible at the radiograph of a weld. Assuming it turned into
caused by the welding technique used, which one of the methods under could be
accountable?
A) SMAW technique.
B) GTAW technique.
C) GMAW method.
D) ST process.
E) ESW procedure. - ANS-b) GTAW process.
As a wellknown rule, weld discontinuities detected by ultrasonic testing are familiar or
rejected on the basis of:
a) Vertical linearity.
B) Time base evaluation.
C) Horizontal response records.
D) Noise to signal ratio.
E) Signal amplitude. - ANS-e) Signal amplitude.
Constant ability electricity sources with the slope control are used for which kind of mode of
switch?
A) Globular transfer.
B) Spray transfer.
C) Pulsed current switch.
, D) Short circuit transfer.
E) Axial spray transfer. - ANS-d) Short circuit transfer.
In generating a drawing for a scale of 1:50, what might be the distance represented with the
aid of a distance on the drawing of 6 cm?
A) 12 cm.
B) 30 cm.
C) 50 cm.
D) 240 cm.
E) three hundred cm. - ANS-e) 300 cm.
Reverse polarity refers to the use of a:
a) AC energy source, electrode +
b) DC strength source, electrode +
c) AC energy source, electrode -
d) DC electricity supply, electrode - - ANS-b) DC energy source, electrode +
Select the perfect penetrameter thickness for two% sensitivity when radiographing a
weldment 1.25 inches in thickness.
A) 0.012 in.
B) 0.1/2 in.
C) zero.0.5 in.
D) 0.030 in. - ANS-c) zero.Half in.
Select the slicing procedure that would offer the narrowest warmness affected region while
slicing 12.5 mm (zero.Five in) thick carbon steel.
A) Oxy-acetylene slicing.
B) Air-carbon arc slicing.
C) Oxy-propane slicing.
D) Plasma arc reducing.
E) Laser beam slicing - ANS-e) Laser beam reducing
Select the electrode that might be quality proper for welding excessive sulphur steels in the
flat function:
a) E4924
b) E4914
c) E4927
d) E4918 - ANS-d) E4918
The mechanical check used to determine the capability of a material to resist failure by way
of brittle fracture requires using:
a) A tensile take a look at specimen.
B) A bend check specimen.
C) A compression take a look at specimen.
D) An impact take a look at specimen.
E) A spectrographic take a look at. - ANS-d) An impact check specimen.
The resistance of steel to failure through brittle fracture is normally assessed with the aid of
engaging in a:
