CWB WELDING - CHAPTER 4 (METALLURGY AND
MATERIAL SPECIFICATION) EXAM QUESTIONS
100% CORRECT ANSWERS
Alloy steels are typically used for: - ANS -Tools and gears.
Engineering materials are classified as metals and: - ANS -Non-metals.
Which of the following elements is used as an alloying element in steel and
provides corrosion resistance? - ANS -Nickel.
True or False? Alloys are mixtures of metal with other metals or non-metals. - ANS
-True.
What is the purpose of using limestone in the blast furnace to convert iron ore
into pig iron? - ANS -Limestone acts as a fluxing agent to form a slag and remove
impurities.
True or False? The basic oxygen furnace is use to produce pig iron. - ANS -False.
The term basic in the basic oxygen furnace refers to the: - ANS -Basicity of the flux
produced.
Compared to the basic oxygen furnace, the electric furnace provides refining
conditions that are: - ANS -More controllable.
, True or False? Semi-killed steel is a class of steel produced from pig iron. - ANS -
True.
The plates for the shell of a pressure vessel are usually formed with the rolling
direction: - ANS -Around the circumference.
True or False? The ductility of a sample transverse to the direction of rolling will
be greater than a longitudinal sample. - ANS -False.
When a plate is made, most of the rolling will usually take place in one direction,
resulting in the formation of elongated inclusions. Elongated inclusions such as
these are called: - ANS -Stringers.
When up to 0.8% carbon is added to iron, the resulting steel under equilibrium
conditions will have a structure of: - ANS -Ferrite and pearlite.
A hypoeutectoid steel has: - ANS -Less than 0.8% carbon.
True or False? The FCC structure is more closely packed than the BCC structure. -
ANS -True.
The extent to which a steel forms martensite at a given cooling rate is called: -
ANS -Hardenability.
True or False? Normalizing of steel involves heating into the fully austenite region
followed by furnace cooling. - ANS -False.
MATERIAL SPECIFICATION) EXAM QUESTIONS
100% CORRECT ANSWERS
Alloy steels are typically used for: - ANS -Tools and gears.
Engineering materials are classified as metals and: - ANS -Non-metals.
Which of the following elements is used as an alloying element in steel and
provides corrosion resistance? - ANS -Nickel.
True or False? Alloys are mixtures of metal with other metals or non-metals. - ANS
-True.
What is the purpose of using limestone in the blast furnace to convert iron ore
into pig iron? - ANS -Limestone acts as a fluxing agent to form a slag and remove
impurities.
True or False? The basic oxygen furnace is use to produce pig iron. - ANS -False.
The term basic in the basic oxygen furnace refers to the: - ANS -Basicity of the flux
produced.
Compared to the basic oxygen furnace, the electric furnace provides refining
conditions that are: - ANS -More controllable.
, True or False? Semi-killed steel is a class of steel produced from pig iron. - ANS -
True.
The plates for the shell of a pressure vessel are usually formed with the rolling
direction: - ANS -Around the circumference.
True or False? The ductility of a sample transverse to the direction of rolling will
be greater than a longitudinal sample. - ANS -False.
When a plate is made, most of the rolling will usually take place in one direction,
resulting in the formation of elongated inclusions. Elongated inclusions such as
these are called: - ANS -Stringers.
When up to 0.8% carbon is added to iron, the resulting steel under equilibrium
conditions will have a structure of: - ANS -Ferrite and pearlite.
A hypoeutectoid steel has: - ANS -Less than 0.8% carbon.
True or False? The FCC structure is more closely packed than the BCC structure. -
ANS -True.
The extent to which a steel forms martensite at a given cooling rate is called: -
ANS -Hardenability.
True or False? Normalizing of steel involves heating into the fully austenite region
followed by furnace cooling. - ANS -False.
