M&P chapter 4

Question 1

Iron tapped from the blast furnace during the initial refining process from a mixture of iron ore, hematite, magnetite, coke, and limestone is referred to as:

Answer 1

Pig iron

Question 2

As a result of the natural conditions inside a blast furnace, pig iron always contains:

Answer 2

3 to 4% carbon

Question 3

Open-hearth, bessemer converter, electric arc,
and basic oxygen are all examples of:

Answer 3

Secondary steel refining furnaces.

Question 4

When the carbon content of pig iron is reduced to less than 2% the resulting new material is generically called:

Answer 4

Cast iron

Question 5

The principle use for wrought iron is in the manufacturing of:

Answer 5

Welded pipe

Question 6

The majority of common carbon and low alloy
steels can be described by a standardized code
system developed by the American Iron and
Steel Institute, which consists of a letter followed by four or five numbers. The letter
refers to the:

Answer 6

Steel manufacturing process used.

Question 7

As the carbon content of steel is increased from 0.05% (low carbon), the strength of the material also increases. This increase in strength causes a
loss of:

Answer 7

Ductility

Question 8

__________ are rarely hardened by heat treatment because their carbon content permits so little formation of hard martensite.

Answer 8

Low carbon steels.

Question 9

Steels that contain __________ carbon contain sufficient carbon that they may be heat treated for desirable strength, hardness, machinability,
or other properties.

Answer 9

0.25 to 0.5%

Question 10

Carbon steel, classified as tool and die steel, in which hardness is the principle property desired, is referred to as:

Answer 10

High carbon steel.