CWB LEVEL 3 MODULE 21 PRACTICE QUESTIONS WITH GUARANTEED ACCURATE ANSWERS |LATEST 202526

CWB LEVEL 3 MODULE 21 PRACTICE QUESTIONS WITH
GUARANTEED ACCURATE ANSWERS |LATEST 2025\26

Terms in this set (43)


The maximum solubility of (c) 0.02%.
carbon in a iron is:
(a)2%.
(b) 0.002%.
(c) 0.02%.
(d)There is no solubility.

True or false? True
When a steel is heated into
the austenite region, all carbon
and most other compounds
dissolve to form a single
phase.

True or false? False
Pearlite is a single phase.

What is the resulting structure of About 25% proeutectoid ferrite and 75% pearlite
a 0.6% carbon steel slowly
cooled from 900°C to room
temperature?

, Most fine grain steels retain (b)
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.

Why is martensite produced Insufficient time for carbon to diffuse to form carbides
rather than pearlite when a
steel is rapidly quenched from,
900°C?

The hardness of martensite (c)
depends mainly on the:
(a)alloy content.
(b) rate of cooling.
(c) carbon content.
(d) size of the part.

Can bainite normally be No
produced in continuous
cooling of a plain carbon
steel?