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