CWB Welding - Chapter 4 (Metallurgy and Material Specification)
|| All Accurately Answered.
Alloy steels are typically used for: correct answers Tools and gears.
Engineering materials are classified as metals and: correct answers Non-metals.
Which of the following elements is used as an alloying element in steel and provides corrosion
resistance? correct answers Nickel.
True or False? Alloys are mixtures of metal with other metals or non-metals. correct answers
True.
What is the purpose of using limestone in the blast furnace to convert iron ore into pig iron?
correct answers 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. correct answers False.
The term basic in the basic oxygen furnace refers to the: correct answers Basicity of the flux
produced.
Compared to the basic oxygen furnace, the electric furnace provides refining conditions that are:
correct answers More controllable.
True or False? Semi-killed steel is a class of steel produced from pig iron. correct answers True.
The plates for the shell of a pressure vessel are usually formed with the rolling direction: correct
answers Around the circumference.
, True or False? The ductility of a sample transverse to the direction of rolling will be greater than
a longitudinal sample. correct answers 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: correct answers
Stringers.
When up to 0.8% carbon is added to iron, the resulting steel under equilibrium conditions will
have a structure of: correct answers Ferrite and pearlite.
A hypoeutectoid steel has: correct answers Less than 0.8% carbon.
True or False? The FCC structure is more closely packed than the BCC structure. correct answers
True.
The extent to which a steel forms martensite at a given cooling rate is called: correct answers
Hardenability.
True or False? Normalizing of steel involves heating into the fully austenite region followed by
furnace cooling. correct answers False.
Hot rolling is carried out: correct answers In the fully austenitic region.
Tempering martensite involves reheating to a temperature: correct answers Below the lower
transformation temperature of 723 degrees.
True or False? Controlled rolled, killed, fine grain steel has a higher impact energy than as-
rolled, killed, fine grain steel. correct answers True.
The three major steel groups are carbon steels, low-alloy steels and: correct answers Alloy steels.
|| All Accurately Answered.
Alloy steels are typically used for: correct answers Tools and gears.
Engineering materials are classified as metals and: correct answers Non-metals.
Which of the following elements is used as an alloying element in steel and provides corrosion
resistance? correct answers Nickel.
True or False? Alloys are mixtures of metal with other metals or non-metals. correct answers
True.
What is the purpose of using limestone in the blast furnace to convert iron ore into pig iron?
correct answers 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. correct answers False.
The term basic in the basic oxygen furnace refers to the: correct answers Basicity of the flux
produced.
Compared to the basic oxygen furnace, the electric furnace provides refining conditions that are:
correct answers More controllable.
True or False? Semi-killed steel is a class of steel produced from pig iron. correct answers True.
The plates for the shell of a pressure vessel are usually formed with the rolling direction: correct
answers Around the circumference.
, True or False? The ductility of a sample transverse to the direction of rolling will be greater than
a longitudinal sample. correct answers 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: correct answers
Stringers.
When up to 0.8% carbon is added to iron, the resulting steel under equilibrium conditions will
have a structure of: correct answers Ferrite and pearlite.
A hypoeutectoid steel has: correct answers Less than 0.8% carbon.
True or False? The FCC structure is more closely packed than the BCC structure. correct answers
True.
The extent to which a steel forms martensite at a given cooling rate is called: correct answers
Hardenability.
True or False? Normalizing of steel involves heating into the fully austenite region followed by
furnace cooling. correct answers False.
Hot rolling is carried out: correct answers In the fully austenitic region.
Tempering martensite involves reheating to a temperature: correct answers Below the lower
transformation temperature of 723 degrees.
True or False? Controlled rolled, killed, fine grain steel has a higher impact energy than as-
rolled, killed, fine grain steel. correct answers True.
The three major steel groups are carbon steels, low-alloy steels and: correct answers Alloy steels.
