CWB Level 3 Exam- Prep (Latest 2026/2027
Update) Practice Questions with 100%
Verified Answers | Canadian Welding
Bureau Inspector Certification| Graded A+
Question:
What is the resulting structure of a 0.6% carbon steel slowly cooled from
900°C to room
temperature??
Answer:
About 25% proeutectoid ferrite and 75% pearlite
Question:
Most fine grain steels retain their fine grains: (
(a) up to the melting temperature.
(b) up to the grain coarsening temperature, but above that behave as
coarse grain steel. C
(c) only up to the transformation temperature.?
Answer:
(b)
,Question:
Why is martensite produced rather than pearlite when a
steel is rapidly quenched from, 900°C??
Answer:
Insufficient time for carbon to diffuse to form carbides
Question:
The hardness of martensite depends mainly on the:
(a) alloy content.
(b) rate of cooling.
(c) carbon content.
(d) size of the part.?
Answer:
(c)
Question:
The maximum solubility of carbon in a iron is:
(a) 2%.
(b) 0.002%.
(c) 0.02%.
(d) There is no solubility.?
, Answer:
(c) 0.02%.
Question:
True or false?
When a steel is heated into the austenite region, all carbon and most other
compounds dissolve
to form a single phase.?
Answer:
True
Question:
True or false?
Pearlite is a single phase.?
Answer:
False
Question:
Update) Practice Questions with 100%
Verified Answers | Canadian Welding
Bureau Inspector Certification| Graded A+
Question:
What is the resulting structure of a 0.6% carbon steel slowly cooled from
900°C to room
temperature??
Answer:
About 25% proeutectoid ferrite and 75% pearlite
Question:
Most fine grain steels retain their fine grains: (
(a) up to the melting temperature.
(b) up to the grain coarsening temperature, but above that behave as
coarse grain steel. C
(c) only up to the transformation temperature.?
Answer:
(b)
,Question:
Why is martensite produced rather than pearlite when a
steel is rapidly quenched from, 900°C??
Answer:
Insufficient time for carbon to diffuse to form carbides
Question:
The hardness of martensite depends mainly on the:
(a) alloy content.
(b) rate of cooling.
(c) carbon content.
(d) size of the part.?
Answer:
(c)
Question:
The maximum solubility of carbon in a iron is:
(a) 2%.
(b) 0.002%.
(c) 0.02%.
(d) There is no solubility.?
, Answer:
(c) 0.02%.
Question:
True or false?
When a steel is heated into the austenite region, all carbon and most other
compounds dissolve
to form a single phase.?
Answer:
True
Question:
True or false?
Pearlite is a single phase.?
Answer:
False
Question:
