CWB Welding Inspection Level II -
Chapter 1 Welding Processes and
Equipment
_______ is not unusual weld defect which can occur while the use of high modern-day
DCEP polarity for the SAW manner:
Slag entrapment
Solidification cracking
Undercut
Underfill - ANS-Solidification cracking
___________ is commonplace weld disorder that can occur while the usage of excessive
cutting-edge DCEP polarity for the SAW technique.
A. Undercut
b. Underfill
c. Slag entrapment
d. Solidification cracking - ANS-d. Solidification cracking
A disadvantage of the usage of DCEN as compared to DCEP with the SAW method is:
(Multiple Choice)
A) more distortion.
B) more solidification cracking.
C) susceptibility to incomplete penetration.
D) greater slag inclusions. - ANS-C) susceptibility to incomplete penetration.
A wire specific via CSA Standard W48 as an E491T-9MJ-H8: (Multiple Choice)
A) effects in a weld deposit with a maximum of eight ml of diffusible hydrogen per one
hundred g of weld metallic.
B) has a yield strength of 550 MPa.
C) is restricted to welding within the flat and horizontal positions.
D) does now not meet the requirements for advanced longevity of 27J at -40 °C. - ANS-A)
outcomes in a weld deposit with a most of 8 ml of diffusible hydrogen in line with one
hundred g of weld metallic.
An arc plasma consists of
a. Atoms and gasoline molecules.
B. Loose electrons and tremendous ions.
C. Carbon atoms and hydrogen molecules.
D. Mild of a fixed wavelength - ANS-b. Loose electrons and wonderful ions.
An arc plasma consists of ___________________________.
Loose electrons and fine ions.
Carbon atoms and hydrogen molecules.
, Atoms and fuel molecules.
Mild of a hard and fast wavelength - ANS-free electrons and tremendous ions
Can the GMAW technique use a steady voltage strength supply in addition to a consistent
modern-day energy source? (Multiple Choice)
A) yes
B) no - ANS-B) no
Compared with the FCAW technique the MCAW procedure has the subsequent capabilities.
A. Higher deposition charges for the same electrode length and contemporary
b. Typically most effective used in the flat and horizontal function
c. Higher productiveness because there is most effective islanding slag produced
d. All of the above - ANS-d. All of the above
Diffusion welding is: (Multiple Choice)
A) a fusion welding method.
B) a excessive density fusion procedure that produces coalescence between substances by
means of the warmth generated from a centered beam of excessive velocity electrons.
C) using frictional warmness generated with the aid of the movement of substances, in
contact under compressive forces, to shape a stable kingdom metallurgical bond.
D) a solid country welding method that produces an atomic bond between two surfaces thru
the software of heat and stress. - ANS-D) a solid kingdom welding method that produces an
atomic bond among surfaces thru the application of heat and stress.
Do fluxes used for soldering update pre-cleaning? (Multiple Choice)
A) Yes
B) No - ANS-B) No
Electrodes for flux cored arc welding: (Multiple Choice)
A) can be self shielded or fuel shielded.
B) can only be self shielded.
C) can most effective be fuel shielded.
D) can only be a stable electrode. - ANS-A) can be self shielded or gasoline shielded.
Explosion welding is: (Multiple Choice)
A) a solid kingdom welding procedure that produces an atomic bond between surfaces thru
the utility of heat and strain.
B) a strong kingdom technique wherein coalescence is produced through high speed
impacting of two or extra substances with the aid of managed detonation.
C) a procedure in which the warmth generated in a chemical reaction is used to sign up for
cloth with or without the software of pressure.
D) a technique that utilizes a beam of coherent optical light centered to create a small spot of
severe heat and is appropriate for welding steel and non-metallic materials. - ANS-B) a
strong kingdom process wherein coalescence is produced through excessive speed
impacting of two or more materials via controlled detonation.
Fluxes that significantly influence the weld steel composition are termed: (Multiple Choice)
A) active fluxes.
B) acidic fluxes.
Chapter 1 Welding Processes and
Equipment
_______ is not unusual weld defect which can occur while the use of high modern-day
DCEP polarity for the SAW manner:
Slag entrapment
Solidification cracking
Undercut
Underfill - ANS-Solidification cracking
___________ is commonplace weld disorder that can occur while the usage of excessive
cutting-edge DCEP polarity for the SAW technique.
A. Undercut
b. Underfill
c. Slag entrapment
d. Solidification cracking - ANS-d. Solidification cracking
A disadvantage of the usage of DCEN as compared to DCEP with the SAW method is:
(Multiple Choice)
A) more distortion.
B) more solidification cracking.
C) susceptibility to incomplete penetration.
D) greater slag inclusions. - ANS-C) susceptibility to incomplete penetration.
A wire specific via CSA Standard W48 as an E491T-9MJ-H8: (Multiple Choice)
A) effects in a weld deposit with a maximum of eight ml of diffusible hydrogen per one
hundred g of weld metallic.
B) has a yield strength of 550 MPa.
C) is restricted to welding within the flat and horizontal positions.
D) does now not meet the requirements for advanced longevity of 27J at -40 °C. - ANS-A)
outcomes in a weld deposit with a most of 8 ml of diffusible hydrogen in line with one
hundred g of weld metallic.
An arc plasma consists of
a. Atoms and gasoline molecules.
B. Loose electrons and tremendous ions.
C. Carbon atoms and hydrogen molecules.
D. Mild of a fixed wavelength - ANS-b. Loose electrons and wonderful ions.
An arc plasma consists of ___________________________.
Loose electrons and fine ions.
Carbon atoms and hydrogen molecules.
, Atoms and fuel molecules.
Mild of a hard and fast wavelength - ANS-free electrons and tremendous ions
Can the GMAW technique use a steady voltage strength supply in addition to a consistent
modern-day energy source? (Multiple Choice)
A) yes
B) no - ANS-B) no
Compared with the FCAW technique the MCAW procedure has the subsequent capabilities.
A. Higher deposition charges for the same electrode length and contemporary
b. Typically most effective used in the flat and horizontal function
c. Higher productiveness because there is most effective islanding slag produced
d. All of the above - ANS-d. All of the above
Diffusion welding is: (Multiple Choice)
A) a fusion welding method.
B) a excessive density fusion procedure that produces coalescence between substances by
means of the warmth generated from a centered beam of excessive velocity electrons.
C) using frictional warmness generated with the aid of the movement of substances, in
contact under compressive forces, to shape a stable kingdom metallurgical bond.
D) a solid country welding method that produces an atomic bond between two surfaces thru
the software of heat and stress. - ANS-D) a solid kingdom welding method that produces an
atomic bond among surfaces thru the application of heat and stress.
Do fluxes used for soldering update pre-cleaning? (Multiple Choice)
A) Yes
B) No - ANS-B) No
Electrodes for flux cored arc welding: (Multiple Choice)
A) can be self shielded or fuel shielded.
B) can only be self shielded.
C) can most effective be fuel shielded.
D) can only be a stable electrode. - ANS-A) can be self shielded or gasoline shielded.
Explosion welding is: (Multiple Choice)
A) a solid kingdom welding procedure that produces an atomic bond between surfaces thru
the utility of heat and strain.
B) a strong kingdom technique wherein coalescence is produced through high speed
impacting of two or extra substances with the aid of managed detonation.
C) a procedure in which the warmth generated in a chemical reaction is used to sign up for
cloth with or without the software of pressure.
D) a technique that utilizes a beam of coherent optical light centered to create a small spot of
severe heat and is appropriate for welding steel and non-metallic materials. - ANS-B) a
strong kingdom process wherein coalescence is produced through excessive speed
impacting of two or more materials via controlled detonation.
Fluxes that significantly influence the weld steel composition are termed: (Multiple Choice)
A) active fluxes.
B) acidic fluxes.
