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 - ANSWER E. C and D above
Stainless steel and Cast iron
The melting point of carbon steel is approximately:
A. 2250F
B. 2375F
C. 2780F
D. 3005F
E. 3333F - ANSWER 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
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,E. Tri-mix - ANSWER 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 - ANSWER B. Hardness decreases
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 - ANSWER 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 - ANSWER D. External restraint
Which of the following is truly a volumetric test method?
2
,A.RT
B.UT
C.VT
D.MT
E.PT - ANSWER 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 - ANSWER 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
E. Travel speed - ANSWER C. Current
As the temperature of the base metal is decreased:
A. Impact strength decreases
B. Tensile strength increases
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, C. Ductility decreases
D. Hardness increases
E. All of the above - ANSWER E. All of the above
An E7018 SMAW electrode exhibits which of the following characteristics?
A. Low hydrogen; use on AC only; iron powder
B. Low hydrogen; use on AC and DCEN
C. Low hydrogen; AC and DCEP; iron powder
D. Rutile; DCEP
E. Rutile; DCEP; iron powder - ANSWER C. Low hydrogen; AC and DCEP; iron powde
Piezoelectricity is a material property used by which NDE method?
A. UT
B. ET
C. RT
D. MT
E. PT - ANSWER A. UT
A thermal treatment that follows quenching and restores some of the metal's ductility is re-
ferred to as:
A. Stress relief
B. Tempering
C. Hardening
D. Normalizing
E. Postheat - ANSWER B. Tempering
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A. High-carbon steel
B. Low-carbon steel
C. Stainless steel
D. Cast iron
E. C and D above - ANSWER E. C and D above
Stainless steel and Cast iron
The melting point of carbon steel is approximately:
A. 2250F
B. 2375F
C. 2780F
D. 3005F
E. 3333F - ANSWER 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
1
,E. Tri-mix - ANSWER 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 - ANSWER B. Hardness decreases
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 - ANSWER 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 - ANSWER D. External restraint
Which of the following is truly a volumetric test method?
2
,A.RT
B.UT
C.VT
D.MT
E.PT - ANSWER 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 - ANSWER 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
E. Travel speed - ANSWER C. Current
As the temperature of the base metal is decreased:
A. Impact strength decreases
B. Tensile strength increases
3
, C. Ductility decreases
D. Hardness increases
E. All of the above - ANSWER E. All of the above
An E7018 SMAW electrode exhibits which of the following characteristics?
A. Low hydrogen; use on AC only; iron powder
B. Low hydrogen; use on AC and DCEN
C. Low hydrogen; AC and DCEP; iron powder
D. Rutile; DCEP
E. Rutile; DCEP; iron powder - ANSWER C. Low hydrogen; AC and DCEP; iron powde
Piezoelectricity is a material property used by which NDE method?
A. UT
B. ET
C. RT
D. MT
E. PT - ANSWER A. UT
A thermal treatment that follows quenching and restores some of the metal's ductility is re-
ferred to as:
A. Stress relief
B. Tempering
C. Hardening
D. Normalizing
E. Postheat - ANSWER B. Tempering
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