CWB Level 2 Closed Book
A backing gasoline is used to:
a) Prevent root burn-thru.
B) Reduce root concavity.
C) Support the molten root steel.
D) Prevent root oxide infection. - ANS-d) Prevent root oxide contamination.
A crack perpendicular to the period of the weld is referred to as 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 excellent used with big electrodes on skinny substances.
B) It is satisfactory used with small electrodes on skinny sections.
C) It allows to take away arc blow.
D) It minimizes internal undercut. - ANS-c) It enables to cast off arc blow.
An irregular, dense white spot is visible on the radiograph of a weld. Assuming it was resulting
from the welding manner used, which one of the methods below would be accountable?
A) SMAW procedure.
B) GTAW method.
C) GMAW manner.
D) ST manner.
E) ESW manner. - ANS-b) GTAW procedure.
As a wellknown rule, weld discontinuities detected through ultrasonic checking out are usual or
rejected on the premise 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 potential power sources with the slope manage are used for which type of mode of
transfer?
A) Globular switch.
B) Spray switch.
C) Pulsed modern-day switch.
D) Short circuit switch.
E) Axial spray transfer. - ANS-d) Short circuit switch.
In generating a drawing for a scale of 1:50, what could be the distance represented through a
distance at the drawing of 6 cm?
A) 12 cm.
B) 30 cm.
C) 50 cm.
D) 240 cm.
E) three hundred cm. - ANS-e) three hundred cm.
Reverse polarity refers to using a:
a) AC energy supply, electrode +
b) DC energy supply, electrode +
c) AC power source, electrode -
d) DC power source, electrode - - ANS-b) DC power source, electrode +
Select the appropriate penetrameter thickness for 2% sensitivity whilst radiographing a
weldment 1.25 inches in thickness.
A) 0.012 in.
B) zero.1/2 in.
C) 0.0.5 in.
D) zero.030 in. - ANS-c) zero.Half in.
Select the slicing technique that could offer the narrowest warmth affected quarter while cutting
12.Five mm (zero.5 in) thick carbon metal.
A) Oxy-acetylene reducing.
B) Air-carbon arc slicing.
C) Oxy-propane cutting.
D) Plasma arc slicing.
E) Laser beam cutting - ANS-e) Laser beam slicing
Select the electrode that might be pleasant perfect for welding high sulphur steels inside the flat
role:
A backing gasoline is used to:
a) Prevent root burn-thru.
B) Reduce root concavity.
C) Support the molten root steel.
D) Prevent root oxide infection. - ANS-d) Prevent root oxide contamination.
A crack perpendicular to the period of the weld is referred to as 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 excellent used with big electrodes on skinny substances.
B) It is satisfactory used with small electrodes on skinny sections.
C) It allows to take away arc blow.
D) It minimizes internal undercut. - ANS-c) It enables to cast off arc blow.
An irregular, dense white spot is visible on the radiograph of a weld. Assuming it was resulting
from the welding manner used, which one of the methods below would be accountable?
A) SMAW procedure.
B) GTAW method.
C) GMAW manner.
D) ST manner.
E) ESW manner. - ANS-b) GTAW procedure.
As a wellknown rule, weld discontinuities detected through ultrasonic checking out are usual or
rejected on the premise 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 potential power sources with the slope manage are used for which type of mode of
transfer?
A) Globular switch.
B) Spray switch.
C) Pulsed modern-day switch.
D) Short circuit switch.
E) Axial spray transfer. - ANS-d) Short circuit switch.
In generating a drawing for a scale of 1:50, what could be the distance represented through a
distance at the drawing of 6 cm?
A) 12 cm.
B) 30 cm.
C) 50 cm.
D) 240 cm.
E) three hundred cm. - ANS-e) three hundred cm.
Reverse polarity refers to using a:
a) AC energy supply, electrode +
b) DC energy supply, electrode +
c) AC power source, electrode -
d) DC power source, electrode - - ANS-b) DC power source, electrode +
Select the appropriate penetrameter thickness for 2% sensitivity whilst radiographing a
weldment 1.25 inches in thickness.
A) 0.012 in.
B) zero.1/2 in.
C) 0.0.5 in.
D) zero.030 in. - ANS-c) zero.Half in.
Select the slicing technique that could offer the narrowest warmth affected quarter while cutting
12.Five mm (zero.5 in) thick carbon metal.
A) Oxy-acetylene reducing.
B) Air-carbon arc slicing.
C) Oxy-propane cutting.
D) Plasma arc slicing.
E) Laser beam cutting - ANS-e) Laser beam slicing
Select the electrode that might be pleasant perfect for welding high sulphur steels inside the flat
role:
