Chapter 6
The principal ore used in the production of iron and steel is which one of the following
hematite
A eutectic alloy is which of the following (two correct answers)
the composition in an alloy system for which the solidus and liquidus are at the same temperature
The inverse lever rule is used to determine which one of the following in a binary phase diagram
the proportions of each phase present at a given temperature
Plain carbon steels are designated in the AISI code system by which of the following
10xx
Which one of the following is not a common alloying ingredient in steel
Zinc
A steel with 1.0% carbon is known as which one of the followin
hypereutectoid
Galvanized steel is steel that has been coated with which one of the following metals
zinc
Which one of the following elements is the most important alloying ingredient in steel
Carbon
Which of the following metals is noted for its good electrical conductivity
Copper
Traditional brass is an alloy of which of the following metallic elements
Copper, Zinc
Which of the following is the most important cast iron commercially
Gray cast iron
The principal strengthening mechanism in high-strength low-alloy (HSLA) steels is which one of the following
Heat treatment
An alloy is a metal composed of two or more elements, at least one of which is metallic. The two main categories of alloys are which two of the following:
Intermediate phase, Solid solution
Which one of the following metals is not one of the three metals used as the principal constituent in superalloys
Iron
The iron tapped from the blast furnace is which one of the following
Pig Iron
Which of the following metals has the highest density
Platinum
Which one of the following is the source of most commercially produced magnesium
Sea water
Which one of the following metals has the lowest melting point
Tin
A binary phase diagram is a phase diagram indicating the phases of two metallic elements as a function of composition and temperature at atmospheric pressure
True
The Bayer process is associated with the production of which one of the following metals
aluminum
As temperature is increased to slightly above 912C (1674F), pure iron transforms into which one of the following phases
austenite
Today, the two most important processes in steelmaking are which of the following (two correct answers)
basic oxygen furnace, electric arc furnace
From which of the following ores is aluminum derived
bauxite
Which of the following alloying elements are most commonly associated with stainless steel (two best answers)
chromium, nickel
The predominant phase in the iron-carbon alloy system for a composition with 99% iron at room temperature is which one of the following
ferrite
Which of the following properties or characteristics do not apply to metals (two correct answers):
high electrical resistivity, ionic bonding
The strength and hardness of steel increases as carbon content
increases
Which one of the following metals has the lowest density
magnesium
High-speed steels are used in cutting tools for machining. Which of the following alloying elements are used in the highest proportion in high-speed steel (two correct answers)
molybdenum, tungsten