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CWB Module 22 QUESTIONS AND ANSWERS RATED A+ 2024/2025
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CWB Module 22 QUESTIONS AND ANSWERS RATED A+ 2024/2025
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CWB Module 22Complete the subsequent:
a) Chromium stabilizes the _____ form of iron
b) Nickel stabilizes the _____ form of iron - ANSa) bcc
b) fcc
If a instantly chromium steel of 18% Cr and < 0.1 % C is heated to a thousand°C will it rework to
austenite or remain as ferrite? - ANSremain as ferrite
What is the primary shape of an 18% Cr, 8% Ni metal at room temperature? - ANSaustenite
The chromium content material of a stainless steel is 20%. Is it probable this is a martensitic
grade? - ANSNo, Martensitic grade is 18% to 11.Five% Cr
A 14% Cr martensitic metallic heated to 1000°C and air cooled produces a) ferrite
b) aus1enite
c) martensite - ANSc) martensite
Does an austenitic chrome steel have a more or lesser work hardening charge than carbon
metal? - ANSgreater
A carbon metal thing operates satisfactorily at 500°C under a pressure of 50MPa. If 304
stainless had been substituted, as much as what stage should the temperature be raised? -
ANS600°C, 20% extra then carbon
The lack of corrosion resistance because of carbide formation and chromium depletion is
referred to as:
a) sigma formation
b) sensitization
c) stabilization - ANSb) sensitization
What maximum carbon stage is typically specified to make certain freedom from sensitization in
the course of welding?
A) 0.03%
b) zero.003%
C) zero.3% - ANSa) zero.03%
The presence of residual delta ferrite inside the weld steel suggests that primary solidification
became?
A) ferrite
b) austenite - ANSa) ferrite
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