Cwi fundamental practice Questions
and Answers 100% Pass
Which of the following metals cannot be efficiently cut with OFC?
A. High-carbon steel
B. Low-carbon steel
C. Stainless steel
D. Cast iron
E. C and D above - ✔✔E. C and D above
Stainless steel and Cast iron
The melting point of carbon steel is approximately:
A. 2250F
B. 2375F
C. 2780F
Brittie Donald, All Rights Reserved © 2025 1
,D. 3005F
E. 3333F - ✔✔C. 2780F
Which of the following gas(es) is commonly used as a shielding has for GTAW?
A. Argon
B. Carbon dioxide
C. Oxygen
D. Argon/carbon dioxide
E. Tri-mix - ✔✔A. Argon
During tempering, as the temperature increases, which of the following are correct?
A. Hardness increases
B. Hardness decreases
C. Elongation decreases
D. Strength increases
E. Ductility decreases - ✔✔B. Hardness decreases
Brittie Donald, All Rights Reserved © 2025 2
,In GMAW, the distance from the end of the contact tube to the arc is:
A. Arc length
B. Electrode extension
C. Stickout
D. Standoff
E. Work angle - ✔✔B. Electrode extension
The technique which does not aid in reducing residual stress is:
A. Peening
B. Vibratory stress relief
C. Thermal stress relief
D. External restraint
E. Preheating - ✔✔D. External restraint
Which of the following is truly a volumetric test method?
A.RT
Brittie Donald, All Rights Reserved © 2025 3
, B.UT
C.VT
D.MT
E.PT - ✔✔B. UT
Use of preheat will result in:
A. A faster cooling rate and wider heat-affected zone
B. A faster cooling rate and narrower heat-affected zone
C. A slower cooling rate and wider heat-affected zone
D. A slower cooling rate and narrower heat-affected zone
E. None of the above - ✔✔C. A slower cooling rate and wider heat-affected zone
In GMAW, the welding variable controlled by the wire feed speed is:
A. Arc length
B. Voltage
C. Current
D. Stickout
Brittie Donald, All Rights Reserved © 2025 4
and Answers 100% Pass
Which of the following metals cannot be efficiently cut with OFC?
A. High-carbon steel
B. Low-carbon steel
C. Stainless steel
D. Cast iron
E. C and D above - ✔✔E. C and D above
Stainless steel and Cast iron
The melting point of carbon steel is approximately:
A. 2250F
B. 2375F
C. 2780F
Brittie Donald, All Rights Reserved © 2025 1
,D. 3005F
E. 3333F - ✔✔C. 2780F
Which of the following gas(es) is commonly used as a shielding has for GTAW?
A. Argon
B. Carbon dioxide
C. Oxygen
D. Argon/carbon dioxide
E. Tri-mix - ✔✔A. Argon
During tempering, as the temperature increases, which of the following are correct?
A. Hardness increases
B. Hardness decreases
C. Elongation decreases
D. Strength increases
E. Ductility decreases - ✔✔B. Hardness decreases
Brittie Donald, All Rights Reserved © 2025 2
,In GMAW, the distance from the end of the contact tube to the arc is:
A. Arc length
B. Electrode extension
C. Stickout
D. Standoff
E. Work angle - ✔✔B. Electrode extension
The technique which does not aid in reducing residual stress is:
A. Peening
B. Vibratory stress relief
C. Thermal stress relief
D. External restraint
E. Preheating - ✔✔D. External restraint
Which of the following is truly a volumetric test method?
A.RT
Brittie Donald, All Rights Reserved © 2025 3
, B.UT
C.VT
D.MT
E.PT - ✔✔B. UT
Use of preheat will result in:
A. A faster cooling rate and wider heat-affected zone
B. A faster cooling rate and narrower heat-affected zone
C. A slower cooling rate and wider heat-affected zone
D. A slower cooling rate and narrower heat-affected zone
E. None of the above - ✔✔C. A slower cooling rate and wider heat-affected zone
In GMAW, the welding variable controlled by the wire feed speed is:
A. Arc length
B. Voltage
C. Current
D. Stickout
Brittie Donald, All Rights Reserved © 2025 4
