Welding Inspection Level 2, Chapter 7
Questions Fully Solved.
Which of the following phases is the least prone to hydrogen-induced cold cracking (HICC)? -
Answer FCC austenite
The use of a shielding gas containing CO2 can produced increased levels of: - Answer Carbon
Austenitic stainless-steel weldments are more likely than carbon steel weldments to suffer from
distortion because stainless steel: - Answer Has a 50% greater coefficient of thermal
expansion than carbon steel.
Which of the following is the most susceptible to stress corrosion cracking? - Answer
Austenitic stainless steels in the as-welded condition with an environment that may contain
chlorides.
What electrode would be used for joining a martensitic stainless steel if strength is not a factor?
- Answer An austenitic stainless-steel electrode
Which of these stainless steels has the best low temperature impact properties? - Answer
Austenitic
Which stainless steel phase may be subject to serious embrittlement when tempered? - Answer
Martensitic phase
In addition to corrosion resistance, what is one other useful property of some stainless steels? -
Answer Good low temperature toughness
For weld joint preparations, the thermal properties of stainless steels permit a: - Answer
Narrower groove angle.
What are the advantages of duplex stainless steels over ferritic stainless steels? - Answer
Duplex stainless steels have superior toughness and corrosion resistance.
If no ferrite is allowed to form in an austenitic stainless-steel weldment, which method should
be used to avoid weld metal cracking? - Answer Low heat input stringer beads
What types of stainless steel are not able to undergo phase transformations on heating and
cooling? - Answer Ferritic and austenitic
, Stainless steels acquire their special properties because of the presence of: - Answer More
than 10% chromium.
Crevice corrosion can occur in which of these types of welded joints in stainless steel
fabrication? - Answer Partial penetration joints welded from one side
The Iron-Chromium phase diagram indicates that the formation of austenite in stainless steels is
prevented by having chromium levels above: - Answer 14%.
When welding ferritic stainless steels using a ferritic weld metal, what method must be
employed to achieve the best weldment toughness? - Answer Use low heat input stringer
beads to increase the cooling rate
Stabilized austenitic stainless steels obtain their stabilizing properties when: - Answer
Elements are added that form preferential carbides.
The maximum hardness of martensitic stainless steels is determined by the: - Answer Carbon
content.
Which of the following consumables would be best suited for buttering a carbon steel before
welding it to a 304 austenitic stainless steel? - Answer E309
Which two regions in the HAZ of a precipitation hardening stainless steel exhibit a reduction in
strength? - Answer Weld metal and the base metal side of the fusion boundary (weld
interface)
Which elements in a stainless weldment can be lost transferring across the arc using an open
arc welding process without inert gas shielding? - Answer Chromium, titanium, and niobium
With 8% nickel how much chromium must be added to produce austenitic stainless steel? -
Answer 18%
What procedure is normally required to restore general corrosion resistance of stainless steels?
- Answer A passivation process is required to restore corrosion resistance.
The strength of the 200 series of stainless steels is increased by the addition of: - Answer
nitrogen.
Questions Fully Solved.
Which of the following phases is the least prone to hydrogen-induced cold cracking (HICC)? -
Answer FCC austenite
The use of a shielding gas containing CO2 can produced increased levels of: - Answer Carbon
Austenitic stainless-steel weldments are more likely than carbon steel weldments to suffer from
distortion because stainless steel: - Answer Has a 50% greater coefficient of thermal
expansion than carbon steel.
Which of the following is the most susceptible to stress corrosion cracking? - Answer
Austenitic stainless steels in the as-welded condition with an environment that may contain
chlorides.
What electrode would be used for joining a martensitic stainless steel if strength is not a factor?
- Answer An austenitic stainless-steel electrode
Which of these stainless steels has the best low temperature impact properties? - Answer
Austenitic
Which stainless steel phase may be subject to serious embrittlement when tempered? - Answer
Martensitic phase
In addition to corrosion resistance, what is one other useful property of some stainless steels? -
Answer Good low temperature toughness
For weld joint preparations, the thermal properties of stainless steels permit a: - Answer
Narrower groove angle.
What are the advantages of duplex stainless steels over ferritic stainless steels? - Answer
Duplex stainless steels have superior toughness and corrosion resistance.
If no ferrite is allowed to form in an austenitic stainless-steel weldment, which method should
be used to avoid weld metal cracking? - Answer Low heat input stringer beads
What types of stainless steel are not able to undergo phase transformations on heating and
cooling? - Answer Ferritic and austenitic
, Stainless steels acquire their special properties because of the presence of: - Answer More
than 10% chromium.
Crevice corrosion can occur in which of these types of welded joints in stainless steel
fabrication? - Answer Partial penetration joints welded from one side
The Iron-Chromium phase diagram indicates that the formation of austenite in stainless steels is
prevented by having chromium levels above: - Answer 14%.
When welding ferritic stainless steels using a ferritic weld metal, what method must be
employed to achieve the best weldment toughness? - Answer Use low heat input stringer
beads to increase the cooling rate
Stabilized austenitic stainless steels obtain their stabilizing properties when: - Answer
Elements are added that form preferential carbides.
The maximum hardness of martensitic stainless steels is determined by the: - Answer Carbon
content.
Which of the following consumables would be best suited for buttering a carbon steel before
welding it to a 304 austenitic stainless steel? - Answer E309
Which two regions in the HAZ of a precipitation hardening stainless steel exhibit a reduction in
strength? - Answer Weld metal and the base metal side of the fusion boundary (weld
interface)
Which elements in a stainless weldment can be lost transferring across the arc using an open
arc welding process without inert gas shielding? - Answer Chromium, titanium, and niobium
With 8% nickel how much chromium must be added to produce austenitic stainless steel? -
Answer 18%
What procedure is normally required to restore general corrosion resistance of stainless steels?
- Answer A passivation process is required to restore corrosion resistance.
The strength of the 200 series of stainless steels is increased by the addition of: - Answer
nitrogen.
